Caterpillar D6K
Caterpillartrack-type tractor

Caterpillar D6K

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar D6K is a mid-size track-type tractor (dozer) built from 2007 to 2012, the first machine in Cat's then-new K-series dozer line. It runs the Cat C6.6 ACERT diesel, rated at roughly 93 kW (125 hp) net, paired with a dual-path, electronically controlled, closed-loop hydrostatic transmission rather than the torque-converter powershift used on other D6-family dozers. Operating weight runs roughly 12.9 to 13.9 tonnes (28,400 to 30,700 lb); the exact figure varies by configuration and by which factory spec sheet is quoted, with LGP always the heavier of the two. Cat built the D6K in two undercarriage widths only, XL (standard gauge) and LGP (low ground pressure) — there was no plain "Std" version. It took over the lighter end of the D6 class from the older, mechanically driven D6M and ran alongside the heavier, powershift-drive D6N, giving Cat a dedicated finish-grading machine with infinitely variable travel speed. The D6K shipped standard with Cat's sealed-and-lubricated SystemOne undercarriage and offered an AccuGrade-ready option for factory grade-control integration.

Cat retired the D6K around 2012 in favor of the D6K2, which kept the hydrostatic-drive concept but added updated grade-control electronics and moved to a later emissions-tier engine package; the exact engine used in the D6K2 is reported inconsistently across sources, so treat it as a separate machine rather than an extension of the D6K's own C6.6 ACERT. "D6K" parts and service searches online can turn up data for the D6K2 or other related nameplates if the serial prefix isn't checked first. On the used and parts market, the original D6K stays in demand mainly because of that hydrostatic drive: it is simpler to run at variable speed than a powershift machine of the same era. Buyers scrutinize the SystemOne undercarriage and the hydrostatic pump-and-motor package hardest, since replacing or rebuilding either is the biggest cost driver on a machine now well over a decade old.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Caterpillar D6K specifications

Series and Configuration

Platform overviewD6K track-type tractor offered in XL and LGP undercarriage widths (a limited XLP width also existed). Two production generations: the original D6K with hydrostatic drive (launched 2007) and the later D6K2, which carries updated grade-control electronics and, on later units, a revised engine. Configuration and build era change nearly every figure below.
Engine generations, do not blendD6K (original) uses the Cat C6.6 ACERT diesel throughout its production. D6K2 continued with C6.6 ACERT on early Tier 4 Interim/Stage IIIB build, then switched to the smaller-displacement Cat C4.4 ACERT twin-turbo diesel with SCR/DEF aftertreatment on Tier 4 Final/Stage IV/Korea Tier 4 build. These are two distinct engine calibrations under one D6K2 nameplate; specify which emissions tier before quoting engine numbers.

Engine

D6K (original) engineCat C6.6 ACERT, turbocharged diesel. Net power 93 kW (125 hp) at 2,100 rpm. Displacement 6.6 L (403 cu in).
D6K2, Tier 4 Interim/Stage IIIB engineCat C6.6 ACERT. Net power (ISO 9249) 97 kW (130 hp); net power (SAE J1349) 95 kW (128 hp). Maximum/gross power (SAE J1995) 118 kW (158 hp). Displacement 6.6 L (402.8 cu in).
D6K2, Tier 4 Final/Stage IV/Korea Tier 4 engineCat C4.4 ACERT with twin turbo. Net power (ISO 9249) 97 kW (130 hp; 132 hp DIN); net power (SAE J1349) 95 kW (128 hp). Maximum power (SAE J1995) 119 kW (160 hp); maximum power (ISO 14396) 117 kW (157 hp; 159 hp DIN). Bore 105 mm (4.13 in), stroke 127 mm (4.99 in), displacement 4.4 L (268.5 cu in). Rated at 2,200 rpm. Uses Selective Catalytic Reduction with Diesel Exhaust Fluid dosing.
Fuel requirement (Tier 4 engines)Ultra Low Sulfur Diesel only. Biodiesel blends up to B20 accepted when blended with ULSD meeting the applicable biodiesel blend spec.
Altitude deratingNo derating required up to 3,000 m (9,840 ft); automatic derating above that altitude.

Weights

D6K XL operating weight (original)12,886 kg (28,409 lb)
D6K LGP operating weight (original)13,465 kg (29,690 lb)
D6K2 XL operating weight, Tier 4 Interim/Stage IIIB13,314 kg (29,346 lb)
D6K2 LGP operating weight, Tier 4 Interim/Stage IIIB13,948 kg (30,750 lb)
D6K2 XL operating weight, Tier 4 Final/Stage IV13,271 kg (29,258 lb)
D6K2 XL shipping weight, Tier 4 Final/Stage IV12,996 kg (28,651 lb)
D6K2 LGP operating weight, Tier 4 Final/Stage IV13,909 kg (30,664 lb)
D6K2 LGP shipping weight, Tier 4 Final/Stage IV13,634 kg (30,058 lb)
Weight basisOperating weight includes cab, A/C, lights, blade, transmission, drawbar, engine enclosure, hydraulics, full fuel, seat and operator. Shipping weight uses 10% fuel and no operator.

Dimensions

D6K XL length5.00 m (16.4 ft) with blade; 3.81 m (12.5 ft) without blade
D6K XL width over tracks2.33-2.35 m (7.7 ft)
D6K LGP width over tracks2.77 m (9.1 ft)
Cab height, both generations and configurations2.96 m (9.7 ft)
Ground clearanceD6K (original) about 0.37 m (1.2 ft); D6K2 0.35 m (14 in), measured per SAE J1234
Track gauge, D6K (original)XL 1.80 m (5.9 ft); LGP 2.01 m (6.6 ft)
Track gauge, D6K2XL 1.77 m (70 in); LGP 2.00 m (79 in)
Track on ground, both generations and configurations2.65 m (104 in / 8.7 ft)
Standard track shoe widthXL 560 mm (22 in); LGP 760 mm (30 in)
D6K2 basic tractor length (with C-frame/drawbar)4.62 m (182 in). Add 0.38 m (15 in) for a straight VPAT blade, or 1.01 m (40 in) for a 25-degree angled VPAT blade; add about 0.82 m (32 in) for a rear ripper.
D6K2 machine height over ROPS cab, tip of grouser2.965 m (117 in)
D6K2 tractor width, standard shoes, no bladeXL 2.33 m (92 in); LGP 2.76 m (109 in)
D6K2 tractor width, standard shoes with VPAT blade angled 25 degreesXL 2.90 m (114 in); LGP 3.34 m (131 in)
Drawbar height, center of clevis, D6K20.52 m (20 in) from ground face of shoes

Performance

Transmission / travel speed, both generationsHydrostatic dual-path drive, continuously variable, no fixed gear steps. 0-10 km/h (0-6.2 mph) forward and reverse.
Ground pressure, D6K (original)XL about 40 kPa (5.8-6.2 psi); LGP about 31-33 kPa (4.5-4.8 psi). Reported figures vary slightly with measurement standard used.
Ground pressure, D6K2 (both engine tiers, ISO 16754)XL 39.8 kPa (5.77 psi); LGP 30.6 kPa (4.44 psi)
Drawbar pull, D6K2Factory drawbar-pull curve peaks near 200 kN (45,000 lbf) at low travel speed and falls off steeply as ground speed rises toward the 10 km/h (6.2 mph) top speed, typical of a hydrostatic drive. Some published figures list a maximum near 178 kN (40,000 lbf, about 18 metric tons) for the XL configuration; treat exact peak value as approximate and dependent on where it is read from the curve.
Drawbar pull, D6K (original)Not published in the reviewed spec sheets for this generation.
Ripper performance, D6K2 (fixed parallelogram ripper)Maximum penetration force: XL 42.2 kN (9,480 lbf); LGP 45.1 kN (10,138 lbf). Maximum pry-out force: 166.7 kN (37,480 lbf) on both configurations. Maximum penetration depth 360 mm (14.2 in).
GradeabilityNot published as a standalone spec in the reviewed dealer and factory sheets for either generation.

Blades

D6K (original) XL blade2.68 m3 (3.5 yd3) capacity, 3.05 m (10 ft) width over end bits, about 1.14 m (44.9 in) blade height.
D6K (original) LGP blade2.91 m3 (3.8 yd3) capacity, 3.35 m (11 ft) width over end bits.
D6K2 VPAT blade, XL3.26 m3 (4.26 yd3) capacity per the factory spec sheet, 3.196 m (10.5 ft) width over end bits. Some published figures for this configuration run slightly lower, near 3.1 m3 (4.0 yd3); treat as varying by print source.
D6K2 VPAT blade, LGP3.81 m3 (4.98 yd3) capacity per the factory spec sheet, 3.682 m (12.0 ft) width over end bits. Some published figures for this configuration run slightly lower, near 3.3 m3 (4.4 yd3); treat as varying by print source.
D6K2 blade typeVPAT (Variable Pitch Angle Tilt) is the standard blade family. A foldable VPAT option shares the same capacity and width as the fixed version.
D6K (original) blade typeExact factory blade-type letter designation not confirmed in the reviewed sources; capacity and width place it in the same class as a semi-universal-type dozer blade.

Service Capacities

D6K (original) fuel tank294.8 L (77.9 gal)
D6K (original) hydraulic tank57.9 L (15.3 gal)
D6K (original) engine crankcase16.6 L (4.4 gal)
D6K (original) cooling system24.2 L (6.4 gal)
D6K (original) final drive, each sideXL 15.1 L (4 gal); LGP 22.7 L (6 gal)
D6K2 fuel tank, Tier 4 Final/Stage IV260 L (69 gal)
D6K2 DEF tank, Tier 4 Final/Stage IV19 L (5 gal)
D6K2 cooling system, Tier 4 Final/Stage IV30 L (7.9 gal)
D6K2 engine crankcase, Tier 4 Final/Stage IV11 L (2.9 gal)
D6K2 final drive, each side, Tier 4 Final/Stage IV18.5 L (4.9 gal), same for XL and LGP
D6K2 hydraulic tank, Tier 4 Final/Stage IV64 L (16.9 gal)
Fuel/DEF system noteRated fuel tank capacity is smaller on the Tier 4 Final D6K2 than on the original D6K, offset by the addition of a separate DEF tank feeding the SCR aftertreatment system.

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

D6K fluids & capacities

SystemCapacityRecommended fluid
Engine Crankcase (with filter)D6K (Gen 1, Cat C6.6 ACERT engine): approx. 15-16.5 L (4.0-4.35 US gal), depending on source. D6K2 (later Tier 4 Final generation, Cat C4.4 ACERT twin-turbo engine): approx. 11 L (2.9 US gal).Cat DEO or DEO-ULS diesel engine oil. SAE 10W-30 multigrade covers most ambient ranges; SAE 15W-40 for sustained warm climates. Select grade from the ambient-temperature viscosity chart in the OMM.
Cooling SystemD6K (Gen 1): approx. 23-24.4 L (6.1-6.4 US gal). D6K2: approx. 30 L (7.9 US gal).Cat ELC (Extended Life Coolant), factory-fill premix or concentrate mixed with clean water; meets ASTM D3306/D6210. Do not mix with conventional (non-ELC) coolant or top off with a different coolant chemistry.
Fuel TankD6K (Gen 1): approx. 291-295 L (76.9-77.9 US gal). D6K2: approx. 260 L (69 US gal).Ultra-low sulfur No. 2-D diesel. Biodiesel blends up to B20 are acceptable per Cat spec; higher blends call for shorter oil and filter service intervals.
Transmission / Hydrostatic Drive SystemNo separate transmission compartment is listed. The D6K uses a dual-path, electronically controlled, closed-loop hydrostatic transmission with an independent drive circuit to each track, replacing the powershift transmission plus separate bevel-gear/steering-clutch layout used on earlier D6-family dozers. Its oil is drawn from and returns to the machine's single hydraulic tank -- see the Hydraulic System row for the fill volume.Cat HYDO Advanced hydraulic oil, the same fluid used for the implement hydraulic circuit. Grade selected by ambient temperature (SAE 10W/20W/30).
Final Drive (each side)D6K XL undercarriage: approx. 15 L (4.0 US gal) per side. D6K LGP undercarriage: approx. 23 L (6.0 US gal) per side -- capacity varies by undercarriage configuration. D6K2: approx. 18.5 L (4.9 US gal) per side (undercarriage-specific split not documented for this generation in available literature).Cat TDTO (Transmission/Drivetrain Oil), SAE 10W or SAE 30 selected by ambient temperature. Cat FDAO is listed as an approved alternative in later Cat fluid guides.
Hydraulic System / Tank (implement circuit + hydrostatic drive, combined)D6K (Gen 1): approx. 57-58 L (15.0-15.3 US gal). D6K2: approx. 64 L (16.9 US gal).Cat HYDO Advanced hydraulic oil. SAE 10W for colder ambient conditions, SAE 30 for sustained hot climates, SAE 20W as an intermediate grade. Extended drain intervals are supported when paired with S-O-S oil sampling.
Pivot Shaft (equalizer bar)Oil-filled compartment on each side, checked at a dipstick or level plug. No separate refill volume is documented for this model in available literature -- verify against the OMM or with a dealer before servicing.Same oil class as the final drives (Cat TDTO) unless the OMM specifies otherwise for this compartment.
Grease (fittings, pins, bearings)Applied per grease-fitting service point per the lubrication chart; not a fill-volume item.Cat Multipurpose Grease (MPGM), NLGI 2, effective roughly -30 deg C to 40 deg C (-22 deg F to 104 deg F). Cat Advanced 3Moly Grease (NLGI 2 with moly additive) is recommended for high-load pin joints such as the blade lift and tilt linkage. Extreme-cold regions can use an arctic-grade grease per dealer guidance.

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar D6K maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level on the dipstick before starting; top off with the correct Cat DEO-grade oil
  • Drain water and sediment from the primary fuel filter/water separator at the ground-level service point
  • Check coolant level at the sight gauge; top up with Cat ELC only, never mix coolant types
  • Check hydrostatic/hydraulic system oil level with the engine off and the blade lowered to the ground
  • Walk around and inspect the SystemOne undercarriage cartridges, track shoes, and idlers for leaks or damage
  • Weekly: check track sag and adjust toward roughly 50 mm (2 in) of grouser-tip sag between sprocket and idler
Every 250 h
  • Pull an S·O·S engine oil sample, then change the engine oil and filter
  • Replace the primary and secondary fuel filters; prime the low-pressure fuel system before restart
  • Check pivot shaft/equalizer bar oil level on both sides of the track frame
  • Replace the cab fresh-air filter and inspect the recirculating cab filter
  • Inspect the engine drive belt for cracking or glazing; replace if worn
  • Torque-check ROPS/FOPS mounting bolts
Every 500 h
  • Pull S·O·S samples from the hydrostatic system and both final drives at operating temperature
  • Replace the hydrostatic/hydraulic system filter elements
  • Inspect SystemOne cartridge seals for weep and rail wear; recheck track sag
  • Check final drive oil level on each side
  • Clean the fuel tank strainer and check the tank cap and vent
  • Grease C-frame, blade lift, and tilt-cylinder pin joints not covered by SystemOne's sealed lubrication
Every 1,000 h
  • Replace hydrostatic transmission charge and case-drain filter elements
  • Clean and inspect battery terminals; retorque battery hold-downs and coat terminals
  • Schedule a dealer check of engine valve lash on the C6.6 ACERT — specialized tooling is required
  • Change final drive oil on both sides
  • Inspect the ROPS structure and its mounting hardware for cracks or corrosion
Every 2,000 h
  • Draw coolant, engine, hydrostatic, and final-drive S·O·S samples together at operating temperature for a full system review
  • Replace hydrostatic system oil and related filters if trending or hours call for it
  • Clean the radiator core, oil cooler, and charge-air cooler fins of packed debris
  • Deep-inspect the SystemOne undercarriage for cartridge play, roller and idler wear, and sprocket segment wear
  • Check and recalibrate AccuGrade blade sensors and wiring if grade control is fitted
  • Inspect C-frame pivot bushings and the equalizer bar for wear
Every 6,000 h
  • Add the Cat ELC coolant extender at the mid-life point to restore the additive package
  • Have engine valve lash and injector performance checked by a dealer technician
  • Evaluate SystemOne undercarriage cartridges for continued service versus replacement based on wear readings
  • Check hydrostatic pump and motor case-drain flow for early wear trending
Every 12,000 h
  • Fully drain and refill the cooling system with new Cat ELC on the extended-life interval
  • Budget for SystemOne undercarriage cartridge and rail replacement once wear limits are reached
  • Have the hydrostatic pump/motor pair and final drives evaluated for rebuild if performance or oil samples are trending down
  • Inspect the C6.6 ACERT long block for a top-end or inframe rebuild if compression or blow-by indicates it

Servicing the D6K beyond the schedule

Predictive Maintenance & Fluid Analysis

Run Cat's S·O·S oil program on the C6.6 ACERT every 250 hours and on the hydrostatic system and both final drives every 500 hours; rising iron or silicon in the hydrostatic sample usually shows up before any drive symptom does. Track ELC coolant condition against the extender-and-drain schedule instead of guessing. Log track sag and SystemOne cartridge play at each service — a widening trend flags undercarriage wear long before a pin or cartridge actually fails, which is the biggest line item on a used D6K.

Corrective & Common Repairs

Most drivability complaints trace to the dual-path hydrostatic system, not the C6.6 engine: check charge pressure, case-drain flow, and the machine ECM's speed-matching logic before condemning a pump or motor. SystemOne cartridges rarely need adjustment, but watch for seal weep or rail wear on higher-hour machines — that is normal wear, not a defect. Ground-level fuel filter/water separator access makes water contamination an easy, frequent fix; check it whenever power feels soft under load.

Overhaul & Rebuild Points

Plan overhaul money around the systems that wear hardest: the C6.6 ACERT long block (top-end or inframe once compression and blow-by trend down), the hydrostatic pump-and-motor pair (rebuilt as a matched set, never individually), and the SystemOne undercarriage, where cartridge and rail replacement is the largest single wear-item cost on the machine. Final drive planetaries hold up well if oil samples stay clean, so let S·O·S trending, not hours alone, decide when to open one up.

Seasonal & Environment Servicing

Match ELC coolant concentration to the coldest expected temperature before winter, and check the C6.6's cold-start aid if the machine works in sub-zero conditions; hydrostatic oil viscosity affects how quickly the drive responds on a cold start. LGP units working wet, swampy ground need more frequent SystemOne and final-drive inspection for packed debris, while XL units in rocky or abrasive conditions wear track shoes and idlers faster. Change cab air filters more often during dusty seasonal work to protect the cab interior and electronics.

D6K common service parts

Part numberPart
306-9199Filter As-FuelCheck fitment →
220-8678Seal-RingCheck fitment →
326-1644Filter As-Water Sep & FuelCheck fitment →
252-5001Filter Element As-AirCheck fitment →
252-5002Filter Element As-AirCheck fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

D6K fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
E360 (Level 1/2/3)Low engine oil pressure event on the Cat C6.6 ACERT engine; ECM compares sensed pressure against an rpm-based map. Level 2 derates engine power, level 3 calls for immediate shutdown.Low oil level, a blocked oil pump pickup screen, worn oil pump or bearings, or a faulty oil pressure sensor.Check oil level first, confirm actual pressure with a mechanical gauge before condemning the sensor, and stop the engine once a shutdown-level event is active rather than working through it.
E361 (Level 1/2/3)High engine coolant temperature event on the C6.6 ACERT. Level 2 triggers a gradual power derate; level 3 can shut the engine down.Low coolant level, a plugged or damaged radiator core, failed cooling fan or belt, or a stuck thermostat.Let the engine cool, check coolant level and condition, then inspect radiator fins, fan drive, and belt tension before returning the machine to work.
E396-2High common-rail fuel pressure event on the C6.6 ACERT fuel system.A faulty pressure-regulating/relief valve in the common rail, or a fuel rail pressure sensor sending an incorrect high reading.Verify fuel rail pressure sensor wiring and readings against a calibrated test gauge; if pressure is genuinely high, replace the rail pressure-regulating valve rather than the sensor.
E398-2Low common-rail fuel pressure event on the C6.6 ACERT fuel system, the opposite condition to E396.Clogged primary or secondary fuel filter, a weak fuel transfer (lift) pump, air drawn into the low-pressure fuel circuit, or debris fouling the rail's pressure-limiting valve.Change fuel filters, bleed and check for air in the low-pressure lines, and confirm lift pump supply pressure before condemning the high-pressure pump.
247-9SAE J1939 data link abnormal update rate. This is a companion code the implement ECM logs when it loses communication with another control module on the CAN data link; it does not activate on its own.A wiring or connector fault on the CAN backbone, a blown fuse feeding a module, or the specific ECM named in the accompanying paired code (engine, transmission/chassis, or another implement ECM) has dropped off the network.Do not chase 247-9 in isolation; identify and troubleshoot the paired module-communication code logged at the same time, then inspect data link wiring, connectors, and grounds.
E283-3Low charge pressure to the powertrain (hydrostatic drive) pumps. Level 3 severity calls for an immediate safe shutdown.Low hydraulic/powertrain oil level, a clogged charge filter, or a failing charge pump.Shut the machine down safely, check fluid level and filter condition, then verify actual charge pressure with a gauge before restarting.
E875-1/2Low system (battery) voltage event; level 2 indicates a more sustained low-voltage condition than level 1.A weak or discharged battery, loose or corroded battery cable connections, or a faulty alternator or charging circuit.Check battery state of charge and terminal condition, test alternator output under load, and inspect charging circuit grounds and connections.

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

D6K attachments & work tools

Blades

The D6K's factory dozer blade is a hydraulic Variable Pitch Angle Tilt (VPAT) blade rather than a fixed S/SU/U family — pitch is set to one of four positions (55, 57, 59.5, or 61 degrees) to suit grading versus push work, plus power angle and tilt. Width and capacity track the undercarriage: XL carries a blade around 3.05 m (10 ft) wide at about 2.7 m3 (3.5 yd3); LGP carries a wider blade around 3.35 m (11 ft) at about 2.9 m3 (3.8 yd3); treat these as nominal, since dealer spec sheets vary by cutting-edge and end-bit wear. XL machines can order a foldable VPAT blade to bring transport width under 2.55 m (about 100 in) for road hauling.

Rippers

Rear ripper is a single-cylinder parallelogram design, not the twin-cylinder heavy-duty ripper used on larger D6-class dozers, and is configurable with one, two, or three shanks in curved or straight styles. A one-shank setup weighs roughly 845 kg (1,863 lb), adding about 34 kg (75 lb) per extra shank; maximum penetration is about 360 mm (14.2 in) and is the same figure on both XL and LGP chassis. Fitting the ripper requires the machine's auxiliary hydraulic valve section, and it shares the same rear mounting position and control lever as the towing winch, so the two are not carried together.

Winches

The factory towing winch for this class is the PA50, driven by its own closed-loop hydrostatic pump-and-motor circuit that is independent of the blade/ripper implement pump, giving stepless control of line speed and pull instead of a mechanical clutch/brake drum. It weighs about 907 kg (2,000 lb) with a drum around 200 mm (8 in) diameter by 280 mm (11 in) wide, and mounts to the machine's rigid rear drawbar in the same position the ripper would occupy. Some control packages let the operator select ripper or winch operation from a shared rear lever rather than fitting a dedicated lever for each.

Drawbars/counterweights

Standard equipment includes a rigid rear drawbar set about 480 mm (19 in) off the ground, rated for towing implements such as disks, compactors, or brush/chopper wheels, or for recovering disabled equipment. No standalone counterweight package is documented for the D6K in factory literature; rear ballast effectively comes from whichever tool — ripper or winch — is mounted on the drawbar, or from the bare drawbar itself when neither is fitted. Treat the counterweight line as unconfirmed and verify with a dealer if a specific job calls for added rear weight.

Cab/ROPS guarding for forestry/waste configs

Base operator station is an enclosed ROPS/FOPS cab with air conditioning and sliding side glass; a two-post ROPS canopy, including a heated version, is offered in place of the full cab. For land-clearing, forestry, or other severe-duty sites, sweep and screen packages are available to shield the hydraulic lines, exhaust stack, cab glass, and lights, alongside a heavy-duty radiator grille, bottom guard, and fuel-tank guard; polycarbonate window glazing is a further upgrade over standard glass for these configurations.

Hydraulic arrangement notes for front/rear tools

The base implement circuit is a 3-valve, load-sensing system that runs the VPAT blade's lift, tilt, and pitch functions; a 4th valve section is the option that adds control for the rear ripper. The winch does not share this open-center implement circuit — it runs on its own separate closed-loop hydrostatic pump and motor, sized independently of blade/ripper flow. Total hydraulic reservoir capacity is about 58 L (15.3 gal), and a biodegradable hydraulic fluid option is available for environmentally sensitive sites.

All D6K assemblies by section

Every catalogued assembly group for the Caterpillar D6K. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Air Inlet And Exhaust System
240-8552 Air Cleaner Gp
24***52Air Cleaner Group2
27***18Bracket1
29***35Indicator As-Air Filter Change1
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249-3720 Air Cleaner Gp
10***51Hose1
13***98Clip1
20***45Mount; (Dual Swivel)1
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249-3721 Lines Gp-Air
23***30Gasket-Inlet1
24***21Lines Group-Air; -Ataac1
28***91Elbow As1
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249-3723 Muffler Gp
23***88Gasket-Inlet1
24***23Muffler Group1
27***02Dowel2
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243-2157 Pipe Gp-Exhaust -Long
19***77Washer-Hard; (11x25x10-mm Thk)6
24***57Pipe Group-Exhaust; -Long1
29***38Muffler As1
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305-5970 Turbocharger Gp
03***47Ferrule3
03***14Nut; (7/16-In)1
06***07Plug1
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Basic Engine
279-8837 Camshaft Gp
1B***36Key-Woodruff1
27***25Tappet12
27***26Rod-Push12
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277-4224 Cover Gp-Engine -Auxiliary Drive
10***30Bolt; (M10x1.5x20-mm)1
11***22Bolt; (M8x16-mm)5
27***23Plug1
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305-8963 Cover Gp-Valve Mechanism
03***20Clip1
12***15Bolt; (M8x16x1.25-mm)1
12***81Clip1
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279-8762 Crankshaft Gp
1B***36Key-Woodruff1
22***39Dowel1
27***87Crankshaft Kt1
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306-6845 Cylinder Block Gp
06***43Plug-Side-(1.251 Dia.)5
10***41Bolt; (M6x1x10-mm)6
18***84Dowel2
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277-6990 Cylinder Block Gp
06***43Plug-Side-(1.251 Dia.)5
10***41Bolt; (M6x1x10-mm)6
12***36Ring-Retaining2
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279-8711 Cylinder Block Gp
20***19Bolt; (M8x1.25x16-mm)8
27***11Cylinder Block Group1
29***86Housing-Rear1
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309-6663 Cylinder Head As
19***51Seal-O-Ring1
23***22Plug1
27***16Plug-Core6
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279-8821 Cylinder Head Gp
17***41Head-Gasket1
27***34Bolt-Special; (Cylinder Head)14
27***21Cylinder Head Group1
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279-9255 Flywheel Gp
27***88Gear-Starting Motor Ring; (134-Teeth)1
27***54Bolt12
27***55Flywheel Group1
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279-8846 Housing Gp-Flywheel
10***41Bolt; (M12x1.75x25-mm)3
27***18Seal1
27***21Plug2
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277-3014 Housing Gp-Front
06***79Dowel1
10***51Bolt; (M8x1.25x65-mm)5
10***30Bolt; (M10x1.5x20-mm)1
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256-3464 Lifting Gp-Engine
25***64Lifting Group-Engine1
29***23Plate1
29***24Spacer1
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279-9653 Lifting Gp-Engine
27***51Plate-Lifting1
27***52Plate-Lifting1
27***53Lifting Group-Engine1
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277-4541 Mounting Gp-Engine
27***90Bracket-Mounting2
27***41Mounting Group-Engine1
28***01Bolt2
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249-3722 Mounting Gp-Engine & Xmsn
24***47Support-Engine2
24***22Mounting Group-Engine & Xmsn1
7X***54Bolt; (M16x2x70-mm)4
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305-7300 Pan Gp-Oil
10***90Plug1
18***55Clip1
23***11Clip-Pipe1
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279-8780 Piston & Rod Gp
12***36Ring-Retaining2
22***39Bolt-Special; (Connecting Rod)2
27***75Piston As6
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274-1929 Pulley Gp-Crankshaft
27***29Pulley Group-Crankshaft1
27***00Plug-Shaft End1
27***01Circlip1
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280-1911 Rocker Arm Gp
26***43Hood & Guard Group; -Nacd-Sound Suppression1
28***11Rocker Arm Group1
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206-7285 Suppression Ar-Sound -Nacd
20***85Suppression Ar-Sound; -Nacd1
28***11Rocker Arm Group1
33***97Link12
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279-8825 Valve Mechanism Gp
11***04Seal-O-Ring1
12***15Bolt; (M8x16x1.25-mm)1
13***88Cap-Oil Filler; (Engine)1
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Cooling System
277-2504 Cooler Gp-Engine Oil
19***77Washer-Hard; (11x25x10-mm Thk)6
26***40Guard Group-Radiator1
26***50Cooling Ar-Supplemental1
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274-7674 Cooling Ar
11***77Bolt; (M16x2x65-mm)2
18***43Cap As-Radiator; (Coolant Tank)1
18***31Mount-Rubber8
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269-5950 Cooling Ar-Supplemental
09***47Nut-Thin; (M16x2 Thd)2
09***49Bolt; (M8x1.25x40-mm)2
16***15Nut; (M22x1.5-Thd)1
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269-8121 Fan & Motor Gp -Cooling Fan
09***47Nut-Thin; (M16x2 Thd)2
09***49Bolt; (M8x1.25x40-mm)2
16***15Nut; (M22x1.5-Thd)1
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288-0925 Fastener Gp-Radiator
03***48Clip; (11.11mm .437in Id)1
09***24Spacer; (11x19x58-mm Thk)1
13***53Hose; (192.5cm) (X2)0
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251-4129 Lines Gp-Water
25***29Lines Group-Water1
2B***58Plug--To Block Upper Front Air Manifold1
7W***69Adapter; (Lubricating Oil Cooler)2
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279-9720 Plug Gp-Water Lines
11***29Bolt; (M8x1.25x75-mm)7
22***38Seal-O-Ring1
22***19Gasket1
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277-2939 Pump Gp-Water
11***29Bolt; (M8x1.25x75-mm)7
22***38Seal-O-Ring1
22***19Gasket1
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277-2976 Regulator Gp-Temperature -Water
24***32Bolt-Tee; (M10x1x80.8-mm)1
25***01Filter Element As-Air; (Primary)1
25***02Filter Element As-Air; (Secondary)1
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Electrical And Starting System
3e-6328 Alarm Gp
18***38Collar2
18***39Fan As; (Alternator)1
18***44Coil Assem.1
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226-7683 Alternator Gp-Charging
16***68Bolt; (M10x1.5x95-mm)4
22***83Alternator Group-Charging2
26***76Belt Tensioner1
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9w-0742 Block Gp-Junction -Battery
12***74Screw-Pan Head; (8-32x9.52-mm)1
13***26Washer; (4.52x8.28x0.76-mm Thk)1
28***33Control Group-Unprogrammed; (Product Link 300)1
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309-3676 Control Gp-Unprogrammed -Winch
20***97Wiring Group-Chassis1
20***01Wiring Group-Engine1
28***26Electronics Group-Machine; -Power Train1
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239-9954 Control Gp-Unprogrammed -Product Link 300
23***54Control Group-Unprogrammed; (Product Link 300)(Product Link 321sr)1
29***39Bracket As1
30***31Control Group-Unprogrammed; (Implement)1
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206-7300 Electronics Ar-Machine
12***74Screw-Pan Head; (8-32x9.52-mm)1
13***26Washer; (4.52x8.28x0.76-mm Thk)1
20***00Electronics Ar-Machine1
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262-2043 Electronics Gp-Communication -Product Link 300
26***43Electronics Group-Communication; -Product Link 3001
28***14Software Group-Machine, Exhaust Manifold1
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312-0309 Electronics Gp-Machine -Power Train
31***09Electronics Group-Machine; -Power Train1
33***75Software Group-Machine1
33***76Service Group-Machine1
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314-5298 Electronics Gp-Machine -Ripper
31***98Electronics Group-Machine; -Ripper1
32***13Software Group-Monitor1
32***14Service Group-Monitor1
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284-0826 Electronics Gp-Machine -Power Train
28***26Electronics Group-Machine; -Power Train1
34***84Software Group-Machine1
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294-7829 Electronics Gp-Monitor
29***29Electronics Group-Monitor1
29***53Glow Plug6
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299-6957 Glow Plug Gp
10***01Kit; (Receptacle) (12-Pin) (Includes Receptacle As & Wedge)1
10***06Receptacle Kit; (Includes Wedge And Receptacle Assem.)1
10***62Screw-Machine; (4-40x0.63-In)12
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250-6994 Grade Control Ar -Enclosed Rops
10***01Kit; (Receptacle) (12-Pin) (Includes Receptacle As & Wedge)1
10***06Receptacle Kit; (Includes Wedge And Receptacle Assem.)1
10***62Screw-Machine; (4-40x0.63-In)12
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302-0576 Grade Control Gp -Enclosed Rops
12***74Cover-Connector; (Wire Router)1
15***22Seal; (70mm Od)1
16***90Plug As-Connector; (70-Pin)1
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250-6991 Installation Gp-Communication -Product Link 321sr
16***56Bracket; (Lamp Retaining)1
17***91Bracket Assem.1
17***92Body Assem.1
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219-6488 Lamp Gp-Flood
16***56Bracket; (Lamp Retaining)1
17***91Bracket Assem.1
17***92Body Assem.1
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254-8155 Lamp Gp-Flood
21***88Lamp Group-Flood; -Cab Roof, Front2
25***55Lamp Group-Flood; (24-Volt, 65-Watt)(Cab Front)5
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247-6510 Lighting Gp-Flood -Cab Front, Rear
17***31Screw; (Truss Head) (M4x0.7x12mm)2
19***06Screw-Truss Head; (M5x0.8x16-mm)2
24***10Lighting Group-Flood; -Cab Front, Rear1
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277-6080 Alternator Gp-Charging
27***80Mounting Group-Alternator1
6V***22Tube-Heat Shrink; (25.4-mm Dia)(10-M)0
7F***60Washer6
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255-4260 Mounting Gp-Grade Control
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
11***00Terminal-Bus8
11***90Fuse; (10 Amp)14
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242-3053 Panel Gp-Fuse
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
11***00Terminal-Bus8
11***90Fuse; (10 Amp)14
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336-3545 Radio Gp-Communication -Product Link 121sr
10***04Kit-Receptacle; (4-Pin)(Start Switch)1
15***70Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)1
17***34Probe As-Liquid Level; (Water Separator)1
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178-2345 Sensor Gp-Liquid Level
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
17***45Sensor Group-Liquid Level; -Water Separator-Water In Fuel1
3E***71Wedge; (Receptacle Lock) (3 Pin)1
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224-5530 Sensor Gp-Position
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
12***67Pin-Connector; (14-Ga To 16-Ga)(14-Ga Wire)3
22***30Sensor Group-Position; -Governor, Brake Pedal1
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284-8207 Sensor Gp-Position
15***60Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness)1
15***76Wedge-Plug Lock; (3-Pin)1
18***40Socket-Connector; (14-Ga To 18-Ga)(14-Ga To 18-Ga)3
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266-1467 Sensor Gp-Position -Rotary
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
18***39Pin-Connector; (14-Ga To 18-Ga)(For 14 Gauge Wire)3
26***67Sensor Group-Position; -Brake Pedal1
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266-1470 Sensor Gp-Position
10***05Kit-Receptacle; (6-Pin)(Display Monitor Harness)1
18***35Pin-Connector; (16-Ga To 18-Ga)4
26***70Sensor Group-Position; -Decelerator Pedal1
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214-6863 Sensor Gp-Pressure
21***63Sensor Group-Pressure1
6J***45Seal (.674" Inside Diameter)1
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183-4584 Sensor Gp-Speed
17***49Strap; (Marker)1
18***84Sensor Group-Speed1
23***12Receptacle As-Connector; (2-Pin)1
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319-6491 Sensor Gp-Speed
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
18***35Pin-Connector; (16-Ga To 18-Ga)3
31***91Sensor Group-Speed1
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262-4806 Sensor Gp-Speed
26***06Sensor Group-Speed1
6J***45Seal (.674" Inside Diameter)1
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102-2240 Sensor Gp-Temperature
10***40Sensor Group-Temperature; -Output Transfer Gear Oil1
23***34Valve Group-Ether Starting1
27***96Clamp1
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277-8748 Starting Aid Gp-Ether
18***43Stud3
27***48Starting Aid Group-Ether1
29***28Gasket1
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252-1590 Starting Aid Gp-Ether
12***43Atomizer As1
23***45Nut-Sleeve; (5/16-24-Thd)1
25***90Starting Aid Group-Ether2
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301-2744 Starting Motor Gp-Electric
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***43Stud3
29***28Gasket1
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307-4441 Starting Motor Gp-Electric
2H***22Lockwasher2
30***41Starting Motor Group-Electric1
6F***45Nut-Full; (3/8-24-Thd)2
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301-2768 Starting Motor Gp-Electric
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
14***36Pin-Connector; (14-Ga To 18-Ga)2
27***33Starting Motor Group-Electric1
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7n-0718 Switch Gp-Disconnect -Battery
15***70Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)1
18***36Socket-Connector; (16-Ga To 18-Ga)2
4F***94Nut; (Jam) (5/16-24 Thd)2
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241-8368 Switch Gp-Magnetic -Main Relay
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***35Pin-Connector; (16-Ga To 18-Ga)2
24***68Switch Group-Magnetic; -Main Power Relay-Main Relay1
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258-0883 Switch Gp-Pressure -Fuel Filter
10***05Kit-Receptacle; (6-Pin)(Display Monitor Harness)1
10***10Seal1
14***36Pin-Connector; (14-Ga To 18-Ga)5
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106-0107 Switch Gp-Rotary -Throttle Position
10***04Kit-Receptacle; (4-Pin)(Start Switch)1
10***07Switch Group-Rotary; -Autodig Material Select-Throttle Position1
18***35Pin-Connector; (16-Ga To 18-Ga)3
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158-6634 Switch Gp-Toggle -Ground Level Shutdown
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
15***34Switch Group-Toggle; -Stairway Access Lights1
18***35Pin-Connector; (16-Ga To 18-Ga)3
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165-5970 Switch Gp-Toggle -Fuel Priming Pump
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
16***70Switch Group-Toggle; -Engine Shutoff-Starting Aid-Diagnostic Mode Select1
35***89Filter; (Ether Start)1
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239-1134 Valve Gp-Ether Starting
09***34Terminal-Blade; (18-Ga To 22-Ga)2
10***41Terminal-Receptacle; (18-Ga To 20-Ga)2
10***01Kit; (Receptacle) (12-Pin) (Includes Receptacle As & Wedge)1
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323-8069 Wiring Gp-Cab
03***97Boot1
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)2
10***06Receptacle Kit; (Includes Wedge And Receptacle Assem.)1
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251-2003 Wiring Gp-Cab
09***34Terminal-Blade; (18-Ga To 22-Ga)2
10***41Terminal-Receptacle; (18-Ga To 20-Ga)2
10***01Kit; (Receptacle) (12-Pin) (Includes Receptacle As & Wedge)1
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314-3953 Wiring Gp-Cab
03***97Boot1
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)2
10***06Receptacle Kit; (Includes Wedge And Receptacle Assem.)1
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206-7297 Wiring Gp-Chassis
03***57Washer; (13x26x6-mm Thk)1
10***29Stud; (M10x1.5-Thd)1
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)5
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206-7301 Wiring Gp-Engine
15***49Cable-Electrical; (03050 mm )0
15***50Cable; (00-Ga, Black)(183-cm Each)0
1S***51Terminal-Cable; (00-Ga, 1/2-In Screw)1
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305-8977 Wiring Gp-Engine
10***41Terminal-Receptacle; (18-Ga To 20-Ga)6
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
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316-7717 Wiring Gp-Engine
10***41Terminal-Receptacle; (18-Ga To 20-Ga)6
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
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206-7302 Wiring Gp-Platform
10***41Terminal-Receptacle; (18-Ga To 20-Ga)6
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)2
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314-5978 Wiring Gp-Platform
11***62Tube-Heat Shrink; (10.85-mm Dia)(299-cm)0
12***75Tube-Heat Shrink; (7.44-mm Dia)(560-cm)0
14***36Pin-Connector; (14-Ga To 18-Ga)18
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272-2771 Wiring Gp-Seat
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
13***41Adapter-90 Degree1
17***15Strap; (Dual Clamp)3
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266-9652 Wiring Gp-Winch
11***44Seal-O-Ring2
15***59Cover1
15***60Cover1
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Engine Arrangement
242-1356 Engine Ar
24***56Engine Ar1
27***29Pulley Group-Crankshaft1
27***04Cooler Group-Engine Oil1
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206-7294 Installation Ar-Engine
20***48Lines Group-Fuel1
20***94Installation Ar-Engine1
24***57Pipe Group-Exhaust; -Long1
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Frame And Body
323-8091 Case & Frame Gp
09***18Nut (M6x1.0 Thd)4
21***43Shim; (1-mm Thk)1
26***28Bracket1
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289-6140 Cover Gp-Access -Rh
26***44Door As; (Lh)1
27***23Lock As1
28***40Cover Group-Access; -Rh1
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289-6145 Cover Gp-Access -Lh
19***77Washer-Hard; (11x25x10-mm Thk)3
26***34Bracket As; (Rh)1
26***35Bracket As; (Lh)1
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267-9242 Door Gp-Access -Lh-Sound Suppression
09***84Locknut; (M12x1.75-Thd)4
26***42Door Group-Access; -Lh-Sound Suppression1
28***38Grill Group-Radiator; -Bottom1
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206-7245 Enclosure Gp-Platform
09***84Locknut; (M12x1.75-Thd)4
20***45Enclosure Group-Platform1
28***56Grill Group-Radiator; -Top1
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269-8084 Grill Gp-Radiator
09***47Nut-Thin; (M16x2 Thd)2
16***15Nut; (M22x1.5-Thd)1
26***84Grill Group-Radiator1
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286-3456 Grill Gp-Radiator -Top
24***02Plate As2
24***07Plate As2
24***11Plate As1
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340-1768 Grill Gp-Radiator -Bottom
19***77Washer-Hard; (11x25x10-mm Thk)6
19***78Washer-Hard; (13.5x30x12-mm Thk)2
27***21Plug2
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286-3438 Grill Gp-Radiator -Bottom
22***18Bumper3
28***38Grill Group-Radiator; -Bottom1
32***62Latch1
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249-3604 Guard Gp-Bottom
14***26Plug6
15***21Cap As1
22***94Lock As1
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277-3556 Guard Gp-Fuel Tank -Winch
24***95Plate1
27***90Plate1
27***56Guard Group-Fuel Tank; -Winch1
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267-8340 Guard Gp-Radiator
19***77Washer-Hard; (11x25x10-mm Thk)12
26***40Guard Group-Radiator1
26***40Hood As1
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249-3606 Guard Gp-Rear
20***93Seal; (8.0-Dm Each)0
22***18Bumper3
24***06Guard Group-Rear1
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267-9243 Hood & Guard Gp -Nacd-Sound Suppression
26***41Door As; (Rh)1
26***43Hood & Guard Group; -Nacd-Sound Suppression1
26***46Panel As; (Rh)1
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267-9251 Panel Gp-Side -Rh-Sound Suppression
26***51Panel Group-Side; -Rh-Sound Suppression1
31***64Rubber1
31***65Rubber1
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267-9249 Panel Gp-Side -Lh-Sound Suppression
25***59Rod As1
25***03Hinge2
26***49Panel Group-Side; -Lh-Sound Suppression1
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314-5981 Screen Gp -Rear, Enclosed Rops
31***64Rubber1
31***65Rubber1
31***81Screen Group; -Rear, Enclosed Rops1
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314-5967 Support Gp-Door -Rh
31***66Rubber2
31***67Support Group-Door; -Rh1
31***18Support As1
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314-5968 Support Gp-Door -Lh
19***81Washer-Hard; (22x40x10-mm Thk)2
31***67Support Group-Door; -Rh1
31***68Support Group-Door; -Lh2
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314-5969 Support Gp-Door -Center
19***81Washer-Hard; (22x40x10-mm Thk)2
31***69Support Group-Door; -Center2
31***19Spacer2
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314-7733 Support Gp-Door
10***82Cover1
10***83Cover1
12***28Washer-Hard; (26x40x8-mm Thk)4
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267-9247 Support Gp-Hood -Sound Suppression-Nacd
1K***85Ring Part Of Kit P/N 1w***464
23***62Bar As1
26***47Support Group-Hood; -Sound Suppression-Nacd1
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Fuel System
305-7294 Filter Gp-Fuel
03***47Ferrule3
03***14Nut; (7/16-In)1
06***07Plug1
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174-9570 Filter Gp-Water Sep & Fuel
17***70Filter Group-Water Sep & Fuel; -Primary1
25***83Switch Group-Pressure; -Fuel Filter, Differential-Fuel Filter1
27***38Protection Group-Fuel System; (Line, Low Pressure)2
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306-9380 Injector Gp-Fuel
27***39Seal1
28***37Washer1
30***80Injector Group-Fuel1
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282-0480 Injector Gp-Fuel
22***78Seal-Ring; (Fuel And Water Sep Filter)1
28***80Injector Group-Fuel1
32***44Filter As-Water Sep & Fuel; (Primary)1
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321-3600 Injector Gp-Fuel
27***39Seal1
28***37Washer1
32***00Injector Group-Fuel1
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206-7248 Lines Gp-Fuel
20***48Lines Group-Fuel1
27***39Seal1
28***37Washer1
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305-7299 Lines Gp-Fuel
03***79Nipple; (Hose)1
15***25Valve-Shutoff; (Coolant)1
17***15Strap; (Dual Clamp)1
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351-0973 Pump Gp-Fuel
10***51Bolt; (M8x1.25x65-mm)1
11***59Bolt; (M10x1.5x35-mm)2
12***15Bolt; (M8x16x1.25-mm)3
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310-0659 Pump Gp-Fuel Injection
10***95Bolt; (M8x1.25x35-mm)1
12***15Bolt; (M8x16x1.25-mm)1
16***62Washer2
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291-5919 Pump Gp-Fuel Injection
11***85Seal-O-Ring; (13.94mm Id)1
22***72Fitting-Fuel1
22***00Seal-O-Ring3
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317-8021 Pump Gp-Fuel Injection
17***70Filter Group-Water Sep & Fuel; -Primary1
17***00Seal; (Fuel)2
21***39Filter Base Assembly; (24-Volt)1
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277-8731 Pump Gp-Fuel Prm & Water Sep -Electric
10***40Sensor Group-Temperature; -Output Transfer Gear Oil1
14***36Pin-Connector; (14-Ga To 18-Ga)2
15***24Hex Head Plug; (-4sae) (D6r Iii)1
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301-2710 Pump Gp-Fuel Prm & Water Sep -Electric
27***98Spacer; (13.5x60.5x10-mm Thk)4
28***23Heat Shield, Tank Group-Fuel1
30***10Pump Group-Fuel Prm & Water Sep; -Electric1
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212-3657 Pump Gp-Fuel Prm & Water Sep -Electric
10***40Sensor Group-Temperature; -Output Transfer Gear Oil1
16***16Adapter As1
16***70Switch Group-Toggle; -Engine Shutoff-Starting Aid-Diagnostic Mode Select1
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206-7249 Tank Gp-Fuel
09***43Packing1
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***35Pin-Connector; (16-Ga To 18-Ga)2
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288-5423 Tank Gp-Fuel
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***35Pin-Connector; (16-Ga To 18-Ga)2
28***23Heat Shield, Tank Group-Fuel1
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Hydraulic System
180-9419 Accumulator Gp-Hydraulic -Uncharged
18***19Accumulator Group-Hydraulic; -Uncharged1
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160-2669 Accumulator Gp-Hydraulic -Charged
16***69Accumulator Group-Hydraulic; -Charged1
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226-0420 Accumulator Gp-Pilot Oil -Charged
21***55Bolt-Socket Head; (M5x0.8x55-mm)4
22***20Accumulator Group-Pilot Oil; -Charged1
30***49Valve Group-Solenoid; -With Hardware2
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230-3489 Accumulator Gp-Pilot Oil -Uncharged
11***73Seal-O-Ring2
14***10Cover1
14***11Cover1
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302-8157 Actuator Gp-Hydraulic
09***76Ring1
14***16Ring-Wear1
14***87Seal-Piston1
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177-6949 Actuator Gp-Pump -Winch
11***34Ring1
14***76Ring-Wear1
16***85Seal As-Buffer1
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269-2728 Cylinder Gp-Angling -Fine Grading
11***45Ring1
14***42Ring-Wear1
16***05Bearing1
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269-2730 Cylinder Gp-Bulldozer Lift -Fine Grading
10***28Filter-Oil; (Ultra High Efficiency)1
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
15***14Filter-Oil; (Fire Resistant Fluid)1
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269-2729 Cylinder Gp-Bulldozer Tilt -Fine Grading
08***72Plug-O-Ring3
11***79Bushing; (External)1
11***80Bushing; (Internal)1
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302-7298 Filter Gp-Oil -Power Train, Winch
20***38Lines Group-Angle & Tilt1
20***65Lines Group-Lift Cylinder1
20***77Mounting Group-Valve1
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277-6553 Head Gp-Pump -Winch
10***15Connector1
13***51Spacer; (11x19x6-mm Thk)1
14***27Connector Group2
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206-7280 Hydraulic Ar-3 Valve
09***33Pin-Cotter4
14***40Adapter; (Straight) (-8 Orb X -8 Orfs)3
14***64Elbow, 90°,-8 Orb /-8 Orfs3
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344-8510 Lines Gp-Angle & Tilt
13***51Spacer; (11x19x6-mm Thk)2
14***17Adapter, -12 Orb / -16 Orfs1
14***62Elbow Group1
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252-0452 Lines Gp-Angle & Tilt -Fine Grading
09***33Pin-Cotter4
14***40Adapter; (Straight) (-8 Orb X -8 Orfs)3
14***64Elbow, 90°,-8 Orb /-8 Orfs3
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206-7238 Lines Gp-Angle & Tilt
09***33Pin-Cotter4
14***40Adapter; (Straight) (-8 Orb X -8 Orfs)3
14***64Elbow, 90°,-8 Orb /-8 Orfs3
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250-6999 Lines Gp-Bulldozer -Fine Grading
13***51Spacer; (11x19x6-mm Thk)2
14***27Connector Group1
14***62Elbow Group1
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206-7265 Lines Gp-Lift Cylinder
13***34Spacer; (11x20x25-mm Thk)1
14***36Adapter; (Straight) (-6 Orb X -6 Orfs)2
14***78Elbow, 90°,-6 Orb /-6 Orfs; (90°) (-6 Orbx-6orfs)1
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248-1664 Lines Gp-Pilot
09***52Tube2
10***29Stud; (M10x1.5-Thd)1
14***05Adapter Group1
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250-7798 Lines Gp-Pump
09***52Tube2
10***29Stud; (M10x1.5-Thd)1
12***62Washer; (19x34x3-mm Thk)2
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246-5950 Lines Gp-Winch
16***08Washer; (13.03x25.4x2.38-mm Thk)1
18***98Valve Group-Solenoid2
21***73Nut; (1/2-28-Thd)1
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252-7008 Manifold Gp-Control -Demand Fan
24***82Bracket As1
24***71Plate1
25***08Manifold Group-Control; -Demand Fan1
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266-2273 Manifold & Solenoid Gp-Control -Implement Control
22***84Valve Group-Relief; (Load Sensing Signal)1
22***85Valve Group-Flow Control; (Auxiliary, Inlet)1
22***97Filter-Oil; (Flow Regulator)1
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280-1292 Manifold Gp-Inlet -Air
08***72Plug-O-Ring1
11***29Screw1
12***18Pin1
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266-2580 Manifold Gp-Valve -Inlet
26***81Pump Group-Piston & Gear; -Front-Implement1
26***82Pump Group-Gear; (Rear)(Hydraulic Fan)1
26***80Manifold Group-Valve; -Inlet1
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206-7277 Mounting Gp-Valve
12***94Plug; (Break Off)2
16***97Spring1
16***98Link-Control1
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240-1506 Pin Gp-Cylinder -Fine Grading
10***65Circlip1
11***57Pin1
11***38Piston9
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249-8600 Pump Gp-Piston -Winch
16***78Bearing-Spherical1
16***79Pin3
16***81Spring1
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260-6781 Pump Gp-Piston & Gear -Front-Implement
11***59Mounting As2
24***79Tank Group-Hydraulic1
26***81Pump Group-Piston & Gear; -Front-Implement1
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246-9876 Pump Gp-Piston & Gear -Implement
09***35Spacer; (11x25x20-mm Thk)1
09***86Clamp; (Hose)2
16***62Connector Assembly1
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279-2486 Rotating Gp-Pump -Implement
25***50Kit-Fastener; (Bank Valve)1
26***79Valve & Mtg Group-Solenoid; -Outlet1
26***80Manifold Group-Valve; -Inlet1
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277-6551 Rotating Gp-Pump -Winch
1U***27Guide-Valve1
24***81Tank As-Hydraulic1
24***59Cover As-Hydraulic Tank1
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251-3544 Tank & Mtg Gp-Hydraulic
25***44Tank & Mtg Group-Hydraulic1
25***50Kit-Fastener; (Bank Valve)1
26***79Valve & Mtg Group-Solenoid; -Outlet1
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265-3751 Tank & Mtg Gp-Hydraulic
25***85Seal-O-Ring1
26***51Tank & Mtg Group-Hydraulic1
8F***06Packing,Preformed Plate Assembly Part Of Kit P/N 5r***251
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246-7379 Tank Gp-Hydraulic
14***15Connector As1
14***26Adapter; (Straight) (-4 Orb X -4 Orfs)1
14***27Connector Group1
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244-7115 Valve Gp-Bank 3 -Bulldozer
14***15Connector As1
14***26Adapter; (Straight) (-4 Orb X -4 Orfs)1
14***27Connector Group1
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309-1571 Valve Gp-Bank 3 -Bulldozer
21***55Bolt-Socket Head; (M5x0.8x55-mm)4
22***86Valve As-Check2
25***66Cap-Protection1
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257-7736 Valve Gp-Check
21***55Bolt-Socket Head; (M5x0.8x55-mm)4
22***86Valve As-Check2
25***22Kit-Compensator; (Control Valve)1
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266-2582 Valve Gp-Control -Bulldozer Tilt
22***86Valve As-Check2
25***68Cap-Protection2
25***22Kit-Compensator; (Control Valve)1
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266-2583 Valve Gp-Control -Blade Angle
22***86Valve As-Check2
25***68Cap-Protection2
25***22Kit-Compensator; (Control Valve)1
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320-3629 Valve Gp-Control -Bulldozer Lift
09***51Seal-O-Ring (Id=14.00mm)1
16***16Ring-Backup1
32***29Valve Group-Control; -Bulldozer Lift1
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320-3631 Valve Gp-Control -Blade Angle
03***43Seal-O-Ring1
28***70Gasket1
29***50Kit-Seal; (Flow Compensator)1
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320-3630 Valve Gp-Control -Bulldozer Tilt
19***50Spacer2
19***51Cover1
19***53Gasket1
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250-7881 Valve Gp-Control -Demand Fan
21***55Bolt-Socket Head; (M5x0.8x55-mm)4
22***86Valve As-Check2
25***81Valve Group-Control; -Demand Fan1
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266-2581 Valve Gp-Control -Bulldozer Lift
09***51Seal-O-Ring (Id=14.00mm)1
16***16Ring-Backup1
22***86Valve As-Check2
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257-7732 Valve Gp-Makeup -Bulldozer Lift
11***45Spring1
11***47Shim; (0.3-mm Thk)1
16***15Retainer-Spring1
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277-6630 Valve Gp-Pump Control -Pressure, Flow Compensator-Winch
09***51Seal-O-Ring (Id=14.00mm)1
16***16Ring-Backup1
27***30Valve Group-Pump Control; -Pressure, Flow Compensator-Winch1
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285-5240 Valve Gp-Pump Control -Pressure, Flow Compensator-Implement
09***51Seal-O-Ring (Id=14.00mm)1
16***16Ring-Backup1
28***40Valve Group-Pump Control; -Pressure, Flow Compensator-Implement, Hydraulic Fan1
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177-7122 Valve Gp-Relief -Winch-Charge Pressure
09***51Seal-O-Ring (Id=14.00mm)1
16***16Ring-Backup1
17***22Valve Group-Relief; -Charge Pressure-Vibratory Pump1
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257-7726 Valve Gp-Relief -Dead Engine Lower, Imp Pilot
03***28Seal-O-Ring1
12***32Ring-Backup1
23***13Coil As1
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152-1811 Valve Gp-Relief -Winch
15***11Valve Group-Relief; -Pressure Override-Hydrostatic Pump1
16***13Ring-Backup1
6V***26Seal Interface Between Inlet Manifold; Seal (Interface Between Inlet Manifold1
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348-9774 Valve Gp-Relief -Implement Pilot Pressure
10***42Tower As1
12***40Plate4
14***57Bearing-Sleeve1
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266-3593 Valve Gp-Relief -Implement Pilot Pressure
24***81Flange1
24***12Kit-Seal; (Solenoid Valve)1
26***93Valve Group-Relief; -Implement Pilot Pressure1
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277-6679 Valve Gp-Relief -Winch
27***79Valve Group-Relief; -Crossover, Steering1
32***94Valve Group-Solenoid; (24-Volt)(Without Hardware)1
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302-8149 Valve Gp-Solenoid -With Hardware
10***25Link Group-Pitch; -Fine Grading1
24***06Pin Group-Cylinder; -Fine Grading1
25***99Lines Group-Bulldozer; -Fine Grading1
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252-2237 Valve Gp-Solenoid
10***25Link Group-Pitch; -Fine Grading1
24***06Pin Group-Cylinder; -Fine Grading1
24***30C-Frame Group-Power Angling; -Fine Grading1
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211-2092 Valve Gp-Solenoid
08***49Spacer; (64x72x13-mm Thk)2
10***16Shim; (35-mm Thk)2
10***17Pin1
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Implements
316-5654 C-Frame Gp -Fine Grading
10***25Link Group-Pitch; -Fine Grading1
24***06Pin Group-Cylinder; -Fine Grading1
25***99Lines Group-Bulldozer; -Fine Grading1
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316-5652 C-Frame Gp-Power Angling -Fine Grading
12***27Seal; (95-cm Each)0
18***53Latch As-Door; (Rotary)(Rh)1
18***54Latch As-Door; (Rotary)(Rh)1
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240-1530 C-Frame Gp-Power Angling
08***49Spacer; (64x72x13-mm Thk)2
10***16Shim; (35-mm Thk)2
10***17Pin1
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316-5653 C-Frame Gp-Power Angling -Fine Grading
31***53C-Frame Group-Power Angling; -Fine Grading1
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278-2470 C-Frame Gp-Power Angling -Fine Grading
15***95Link1
1S***11Ring-Retaining2
27***70C-Frame Group-Power Angling; -Fine Grading1
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104-7425 Link Gp-Pitch -Fine Grading
10***25Link Group-Pitch; -Fine Grading1
10***97Valve As; (Low Side)1
10***99Valve As; (Air Conditioner Refrigerant)1
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Lubrication System
280-1428 Filler Gp-Engine Oil
26***25Filter-Engine Oil1
28***28Filler Group-Engine Oil1
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277-2912 Filter Gp-Engine Oil
27***12Filter Group-Engine Oil; -Engine1
31***45Pump-Oil; (Engine)1
6I***90Bolt; (M8x1.25x40-mm)4
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277-4262 Pump Gp-Engine Oil
19***67Seal-O-Ring1
21***33Valve As-Fluid Sampling1
23***61Plug; (Blanking)1
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277-4694 Valve Gp-Fluid Sampling -Engine Oil
10***51Bolt; (M8x1.25x65-mm)5
10***17Washer4
10***47Washer4
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Machine Arrangement
313-3605 Chassis Ar
20***45Enclosure Group-Platform1
24***41Padlock Group; (1 On Fuel Tank Cap) (1 On Hydraulic Tank Cap) (1 On Grill Latch)1
24***02Platform Group-Operator1
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311-6614 Common Ar
20***80Hydraulic Ar-3 Valve1
20***94Installation Ar-Engine1
20***00Electronics Ar-Machine1
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Operator Station
247-6511 Accessory Gp-Cab
10***93Valve As1
10***94Gasket1
10***97Valve As; (Low Side)1
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237-3970 Air Compressor Gp-Seat
10***93Valve As1
10***94Gasket1
10***97Valve As; (Low Side)1
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313-6225 Air Conditioner Gp -Cab
29***90Bearing1
29***08Spacer1
29***12Arm; (Outer, Lh)1
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268-0179 Air Conditioner Gp
26***79Air Conditioner Group1
29***90Bearing1
29***05Arm As; (Outer, Rh)1
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247-6507 Air Conditioner Gp
24***07Air Conditioner Group1
29***81Arm As; (Inner, Rh)1
29***84Arm As; (Inner, Lh)1
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323-8066 Air Conditioner Gp
19***71Hose; (116-cm)0
30***91Nozzle As-Washer1
32***66Air Conditioner Group1
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291-8004 Arm Gp-Seat Suspension -Outer, Rh
19***71Hose; (116-cm)0
29***04Arm Group-Seat Suspension; -Outer, Rh1
30***92Nozzle As-Washer1
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291-7980 Arm Gp-Seat Suspension -Center
13***91Nozzle As-Washer1
19***71Hose; (116-cm)0
24***66Clip-Washer Hose2
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291-8011 Arm Gp-Seat Suspension -Outer, Lh
12***70Capscrew; (Button Hd) (M8x1.25x20) (G10.9)9
25***98Knob2
26***78Bracket1
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226-9222 Arm Gp-Window Wiper
12***70Capscrew; (Button Hd) (M8x1.25x20) (G10.9)9
22***22Arm Group-Window Wiper1
25***98Knob2
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314-9414 Arm Gp-Window Wiper -Front
24***68Bracket As1
24***06Bracket1
24***07Bracket1
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314-9415 Arm Gp-Window Wiper -Rear
24***33Cab Group1
24***56Compressor Group-Refrigerant1
24***69Mounting Group-Cab1
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280-9679 Armrest Gp -Lh
16***80Switch Group-Start; (Key)1
17***74Knob1
24***56Compressor Group-Refrigerant1
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284-7054 Armrest Gp -Rh
24***56Compressor Group-Refrigerant1
24***70Lines Group-Air Conditioner1
24***71Lines Group-Heater1
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245-0772 Bracket Gp-Mounting
20***02Wiring Group-Platform1
24***72Bracket Group-Mounting1
24***00Cab As1
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206-7310 Cab Ar
20***10Cab Ar1
24***05Installation Group-Radio1
24***06Control & Mtg Group-Pedal; -Governor, Brake1
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314-5980 Cab Ar-Enclosed Rops
20***02Wiring Group-Platform1
24***05Installation Group-Radio1
24***06Control & Mtg Group-Pedal; -Governor, Brake1
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323-8070 Cab Ar-Enclosed Rops
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***39Pin-Connector; (14-Ga To 18-Ga)(For 14 Gauge Wire)2
31***18Valve As-Pressure Relief; (Refrigerant Compressor)1
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240-6233 Cab Gp
18***06Compressor Group-Refrigerant; -Air Conditioner1
24***33Cab Group1
25***81Bolt-Flange Head; (M8x1.25x100-mm)2
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311-3799 Cab Gp-Enclosed Rops
10***05Kit-Receptacle; (6-Pin)(Display Monitor Harness)1
12***72Seal; (135-cm)0
15***70Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)2
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323-8071 Cab Gp-Enclosed Rops
13***54Screw-Truss Head; (M4x0.7x10-mm)11
18***46Latch As1
25***36Door1
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243-2156 Compressor Gp-Refrigerant
24***56Compressor Group-Refrigerant1
28***40Cushion As1
28***41Bracket1
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183-5106 Compressor Gp-Refrigerant
13***54Screw-Truss Head; (M4x0.7x10-mm)11
18***06Compressor Group-Refrigerant; -Air Conditioner1
18***46Latch As1
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287-0554 Condenser Gp-Refrigerant
28***40Cushion As1
28***41Bracket1
28***43Bracket As1
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284-3752 Console Gp -Lh
25***39Pedal Group-Governor & Brake1
28***52Console Group; -Lh1
7X***29Washer; (11x25x3-mm Thk)3
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314-3003 Console Gp-Control -Lh
14***31Cap-Push Button; (Yellow)(Transmission Hold)1
18***35Pin-Connector; (16-Ga To 18-Ga)11
22***55Cap-Push Button; (Black)2
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268-9351 Console Gp-Operator -Rh
14***31Cap-Push Button; (Yellow)(Transmission Hold)1
18***35Pin-Connector; (16-Ga To 18-Ga)9
22***55Cap-Push Button; (Black)1
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268-9352 Console Gp-Operator -Lh
15***74Kit-Receptacle; (4-Pin)1
26***52Console Group-Operator; -Lh1
27***65Boot1
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247-6506 Control & Mtg Gp-Pedal -Governor, Brake
18***35Pin-Connector; (16-Ga To 18-Ga)17
23***11Receptacle As-Connector; (6-Pin)1
24***06Control & Mtg Group-Pedal; -Governor, Brake1
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266-7632 Control Gp-Handle -Bulldozer
10***05Kit-Receptacle; (6-Pin)(Display Monitor Harness)1
14***31Cap-Push Button; (Yellow)(Transmission Hold)1
18***35Pin-Connector; (16-Ga To 18-Ga)15
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266-7634 Control Gp-Handle -Steering, Transmission
14***31Cap-Push Button; (Yellow)(Transmission Hold)1
18***35Pin-Connector; (16-Ga To 18-Ga)23
22***55Cap-Push Button; (Black)2
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307-4673 Control Gp-Handle -Winch
12***12Screw-Pan Head; (8-16x0.32-In)1
23***24Control Group-Monitor; (Messenger)1
30***73Control Group-Handle; -Winch-Ripper, Winch-Ripper1
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274-4645 Control Gp-Joystick -Grade Control, Rh
10***91Screw; (Flat Head) (No.6-20x0.5in)4
10***32Lamp Group-Dome1
11***27Screw-Machine; (M6x1x30-mm)1
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290-4835 Control Gp-Joystick -Steering, Transmission
10***91Screw; (Flat Head) (No.6-20x0.5in)4
10***32Lamp Group-Dome1
11***27Screw-Machine; (M6x1x30-mm)1
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328-0894 Control Gp-Joystick -Grade Control, Rh
10***67Washer-Hard; (7.2x25x2-mm Thk)5
18***53Latch As-Door; (Rotary)(Rh)1
18***54Latch As-Door; (Rotary)(Rh)1
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239-5025 Control Gp-Unprgmed Monitor -Messenger
10***91Screw; (Flat Head) (No.6-20x0.5in)4
10***32Lamp Group-Dome1
11***27Screw-Machine; (M6x1x30-mm)1
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247-6509 Cover Gp-Cab -Enclosed Rops
10***91Screw; (Flat Head) (No.6-20x0.5in)4
10***32Lamp Group-Dome1
11***27Screw-Machine; (M6x1x30-mm)1
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331-5387 Cover Gp-Cab
10***71Clevis1
12***75Blade As-Wiper; (450-mm)(Door, Rh)1
13***40Locknut; (M8x1.25-Thd)2
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314-5977 Cover Gp-Cab
10***71Clevis1
12***75Blade As-Wiper; (450-mm)(Door, Rh)1
13***40Locknut; (M8x1.25-Thd)2
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314-9417 Cover Gp-Cab
10***71Clevis1
12***75Blade As-Wiper; (450-mm)(Door, Rh)1
13***40Locknut; (M8x1.25-Thd)2
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323-8063 Door Gp-Cab -Lh
10***55Cover-Speaker2
12***08Screw-Hex Socket; (M4x0.7x30-mm)8
18***53Latch As-Door; (Rotary)(Rh)1
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315-0459 Door Gp-Cab -Rh
13***53Hose; (192.5cm) (X2)0
27***01Bracket1
31***59Door Group-Cab; -Rh1
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247-6501 Door Gp-Cab -Rh
10***71Clevis1
12***75Blade As-Wiper; (450-mm)(Door, Rh)1
13***40Locknut; (M8x1.25-Thd)2
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315-0462 Door Gp-Cab -Lh
27***68Valve Group-Cab Heater1
28***57Coil As-Heater1
29***03Hose1
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247-6502 Door Gp-Cab -Lh
10***71Clevis1
12***75Blade As-Wiper; (450-mm)(Door, Rh)1
13***40Locknut; (M8x1.25-Thd)2
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323-8062 Door Gp-Cab -Rh
10***67Washer-Hard; (7.2x25x2-mm Thk)5
18***53Latch As-Door; (Rotary)(Rh)1
18***54Latch As-Door; (Rotary)(Rh)1
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276-8082 Heater Gp-Cab
13***54Screw-Truss Head; (M4x0.7x10-mm)8
14***22Nut; (M5x0.8-Thd)1
16***54Bolt; (M5x0.8x40-mm)1
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277-9969 Heater Gp-Cab
10***04Kit-Receptacle; (4-Pin)(Start Switch)1
10***07Switch Group-Rotary; -Autodig Material Select-Throttle Position1
11***09Knob-Control1
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323-8068 Installation Gp-Cab
10***07Switch Group-Rotary; -Autodig Material Select-Throttle Position1
11***09Knob-Control1
16***80Switch Group-Start; (Key)1
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247-6505 Installation Gp-Radio
24***05Installation Group-Radio1
33***88Frame As-Lift1
33***24Bolt As2
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333-2656 Instrument Gp
11***36Valve As-Shutoff; (Jacket Water Heater)2
13***53Hose; (192.5cm) (X2)0
17***15Strap; (Dual Clamp)2
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247-6508 Instrument Gp
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***93Valve As1
10***94Gasket1
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269-3790 Insulation Gp-Weather
18***35Pin-Connector; (16-Ga To 18-Ga)4
23***09Receptacle As-Connector; (4-Pin)1
26***23Cap-Wiper1
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333-2618 Lift Gp-Cab
18***35Pin-Connector; (16-Ga To 18-Ga)4
23***09Receptacle As-Connector; (4-Pin)1
26***23Cap-Wiper1
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248-7070 Lines Gp-Air Conditioner
18***35Pin-Connector; (16-Ga To 18-Ga)4
20***23Cap; (Wiper)1
23***09Receptacle As-Connector; (4-Pin)1
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248-7071 Lines Gp-Heater
18***35Pin-Connector; (16-Ga To 18-Ga)1
20***23Cap; (Wiper)1
23***09Receptacle As-Connector; (4-Pin)1
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270-0076 Motor Gp-Window Wiper -Rear
18***35Pin-Connector; (16-Ga To 18-Ga)4
23***09Receptacle As-Connector; (4-Pin)1
26***23Cap-Wiper1
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304-4243 Motor Gp-Window Wiper -Door, Lh
11***31Mount Assem.8
12***95Washer; (32x134x12-mm Thk)4
14***79Sleeve4
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247-6606 Motor Gp-Window Wiper -Front
18***35Pin-Connector; (16-Ga To 18-Ga)4
23***09Receptacle As-Connector; (4-Pin)1
24***06Motor Group-Window Wiper; -Front1
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304-4244 Motor Gp-Window Wiper -Door, Rh
11***31Mount Assem.8
12***95Washer; (32x134x12-mm Thk)4
14***79Sleeve4
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330-5023 Motor Gp-Window Wiper -Rear
09***66Washer; (Hard) (4.5x9x1mm Thk)4
10***04Kit-Receptacle; (4-Pin)(Start Switch)1
11***80Spring1
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330-5021 Motor Gp-Window Wiper -Front
13***43Plate As-Lumbar1
17***52Retainer1
17***07Holder1
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248-7069 Mounting Gp-Cab
09***66Washer; (Hard) (4.5x9x1mm Thk)4
10***04Kit-Receptacle; (4-Pin)(Start Switch)1
11***80Spring1
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356-7099 Mounting Gp-Cab
24***03Platform As; (Rops)1
35***99Mounting Group-Cab1
7X***18Washer-Hard; (13.5x40x5-mm Thk)2
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292-6402 Pan Gp-Backrest -Lumbar
25***59Rod As1
25***02Screen As-Cab1
25***03Hinge2
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253-2439 Pedal Gp-Governor & Brake
03***14Bolt-Self Locking; (1/4unc X 1/2)1
10***67Washer-Hard; (7.2x25x2-mm Thk)1
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
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249-3602 Platform Gp-Operator
24***02Platform Group-Operator1
25***97Seat Group-Suspension; -Vinyl, Air1
26***51Console Group-Operator; -Rh1
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250-1698 Screen Gp-Cab -Rear, Enclosed Rops
17***87Setscrew; (1/4-20-Thd)4
17***35Block Kit; (Includes Bolt, Washers, Blocks And Setscrews)1
20***03Washer-Hard; (10.2x22.22x2.38-mm Thk)2
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272-2272 Seat Belt Gp -Retractable
17***87Setscrew; (1/4-20-Thd)4
17***35Block Kit; (Includes Bolt, Washers, Blocks And Setscrews)1
20***03Washer-Hard; (10.2x22.22x2.38-mm Thk)2
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295-4436 Seat Gp -Vinyl
16***98Seal-Lip Type2
1W***17Dowel-Hollow2
24***95Rod1
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253-8297 Seat Gp-Suspension -Vinyl, Air
03***49Nut-Self Lock; (No.10.Unc)2
10***03Fastener22
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
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250-2121 Seat Gp-Suspension -Vinyl
16***98Seal-Lip Type2
1W***17Dowel-Hollow2
24***95Rod1
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284-7055 Support Gp-Hydraulic Control -Rh
10***29Stud; (M10x1.5-Thd)2
14***95Hose; (650-cm Each)0
15***36Spout As1
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284-7059 Support Gp-Steering Control -Lh
10***29Stud; (M10x1.5-Thd)2
11***62Tube-Heat Shrink; (10.85-mm Dia)(299-cm)0
14***95Hose; (650-cm Each)0
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291-7971 Suspension Gp-Seat -Air
29***71Suspension Group-Seat; -Air1
31***35Seal; (325-cm)0
31***44Seal; (34.8-cm Each)0
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354-7510 Suspension Gp-Seat -Air
31***35Seal; (325-cm)0
31***44Seal; (34.8-cm Each)0
32***52Glass1
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251-5975 Washer Gp-Window
25***75Washer Group-Window1
31***35Seal; (325-cm)0
31***44Seal; (34.8-cm Each)0
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323-8059 Window Gp -Upper Lh
24***82Glass-Front1
24***83Glass-Rear1
25***03Window Group-Cab; -Rh1
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323-8058 Window Gp -Lower Lh
31***35Seal; (325-cm)0
31***44Seal; (34.8-cm Each)0
32***58Window Group; -Lower Lh1
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331-5312 Window Gp -Rear
13***70Seal; (326-cm)0
14***87Cushion1
19***40Seal; (8-cm)0
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331-5309 Window Gp -Upper Rh
13***70Seal; (326-cm)0
14***87Cushion1
19***40Seal; (8-cm)0
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331-5308 Window Gp -Lower Rh
24***82Glass-Front1
24***83Glass-Rear1
33***08Window Group; -Lower Rh1
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259-4403 Window Gp-Cab -Rh
22***72Seal; (19.9-cm)0
25***03Window Group-Cab; -Rh1
26***99Glass; (Rh)1
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311-4600 Window Gp-Cab
13***91Nozzle As-Washer1
14***95Hose; (650-cm Each)0
14***33Blade As-Wiper; (500-mm)(Rear)1
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259-4405 Window Gp-Cab -Lh
22***72Seal; (19.9-cm)0
25***05Window Group-Cab; -Lh1
26***00Glass1
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247-6503 Window Gp-Cab
24***03Window Group-Cab1
29***07Bolt-Head Locking; (M6x1x18-mm)4
31***83Glass-Front1
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331-5333 Window Gp-Cab
13***91Nozzle As-Washer1
14***95Hose; (650-cm Each)0
14***33Blade As-Wiper; (500-mm)(Rear)1
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333-2732 Window Gp-Sliding -Rh
14***95Hose; (650-cm Each)0
20***81Valve As-Check; (Window Washer)3
22***45Blade As-Wiper; (300-mm)(Front)1
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333-2733 Window Gp-Sliding -Lh
12***75Blade As-Wiper; (450-mm)(Door, Rh)1
14***95Hose; (650-cm Each)0
20***81Valve As-Check; (Window Washer)4
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314-9416 Wiper Gp-Window
11***11Socket-Auxiliary Power; (12-Volt)(Power Port)1
16***76Film; (Identification) (12v) (On Rear Console Behind Operators Seat)1
22***89Plug; (Rocker Switch)(Rocker Switch)1
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247-6504 Wiper Gp-Window
08***49Spacer; (64x72x13-mm Thk)4
10***17Pin2
10***34Retainer2
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331-5386 Wiper Gp-Window
24***50Lines Group-Winch1
25***98Lines Group-Pump1
26***52Wiring Group-Winch1
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Power Train
278-4439 Actuator Gp-Pump -Hydrostatic Drive
17***14Disc-Friction8
1B***78Cup,Tapered Roller (Timken 3720) Uoc:Bsu,Bsw12
1B***80Cone-Roller Bearing12
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206-7255 Coupling Gp-Pump
06***40Seal-O-Ring (Id=37.69mm)1
12***94Plug; (Break Off)1
12***98Plug2
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239-1244 Final Drive & Brake Gp
06***40Seal-O-Ring (Id=37.69mm)1
12***94Plug; (Break Off)1
12***98Plug2
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279-0543 Head Gp-Motor -Hydrostatic Drive, Rh
12***94Plug; (Break Off)1
12***56Cap1
12***77Bushing-Coupling1
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278-8935 Head Gp-Motor -Hydrostatic Drive, Lh
12***94Plug; (Break Off)1
12***56Cap1
12***97Bearing1
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278-4440 Head Gp-Pump -Hydrostatic Drive, Lh
10***36Clip1
14***27Connector Group2
14***42Connector Group2
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278-4441 Head Gp-Pump -Hydrostatic Drive, Rh
14***43Tee As-Orfs1
16***69Adapter; (Str Thd (-6) Orfs/0)1
1P***03Seal - Rectangular (31.86mm Id)4
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206-7263 Lines Gp-Drain
14***56Elbow As1
15***38Elbow As1
19***80Washer-Hard; (17.5x32x8-mm Thk)2
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206-7257 Lines Gp-Hydrostatic
14***36Adapter; (Straight) (-6 Orb X -6 Orfs)2
14***40Adapter; (Straight) (-8 Orb X -8 Orfs)3
15***37Tee As.1
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206-7243 Lines Gp-Power Train Cooler
20***43Lines Group-Power Train Cooler1
24***39Motor Group-Piston; -Hydrostatic Drive, Lh1
24***40Motor Group-Piston; -Hydrostatic Drive, Rh1
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252-5074 Lines Gp-Pump
12***13Seal; (Shaft)1
12***14Shim; (3-mm Thk)1
12***79Setscrew-Socket; (M12x1.75-Thd)1
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236-2123 Motor & Mounting Gp -Hydrostatic Drive
12***13Seal; (Shaft)1
12***14Shim; (3-mm Thk)1
12***79Setscrew-Socket; (M12x1.75-Thd)1
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243-6639 Motor Gp-Piston -Hydrostatic Drive, Lh
1P***43Plug-Breather1
24***39Motor Group-Piston; -Hydrostatic Drive, Lh1
24***73Housing1
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243-6640 Motor Gp-Piston -Hydrostatic Drive, Rh
20***43Lines Group-Power Train Cooler1
20***55Coupling Group-Pump1
20***57Lines Group-Hydrostatic1
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206-7267 Mounting Gp-Pump -Power Train
19***77Washer-Hard; (11x25x10-mm Thk)4
20***67Mounting Group-Pump; -Power Train1
24***37Pump Group-Piston; -Hydrostatic Drive1
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337-2171 Power Train Ar
12***51Bolt; (M8x1.25x35-mm)4
17***64Seal-O-Ring2
19***82Bushing-Bearing1
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236-2122 Pump & Mtg Gp-Power Train
14***11Spacer1
23***22Pump & Mtg Group-Power Train1
27***84Coupling2
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278-4449 Pump Gp-Charge -Hydrostatic Drive, Rh
11***28Screw2
11***29Screw1
12***74Screw-Lock1
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278-4448 Pump Gp-Charge -Hydrostatic Drive, Lh
26***29Pump Group-Piston; -Hydrostatic Drive, Lh1
26***30Pump Group-Piston; -Hydrostatic Drive, Rh1
27***48Pump Group-Charge; -Hydrostatic Drive, Lh1
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277-6557 Pump Gp-Charge -Winch
11***96Key-Shaft1
12***77Bushing-Coupling1
24***04Plug2
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243-6637 Pump Gp-Piston -Hydrostatic Drive
11***28Screw2
11***29Screw1
12***74Screw-Lock1
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261-3630 Pump Gp-Piston -Hydrostatic Drive, Rh
09***29Ring; (Retaining)1
12***55Shim; (4.5-mm Thk)1
12***56Shim; (4.6-mm Thk)1
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261-3629 Pump Gp-Piston -Hydrostatic Drive, Lh
12***55Shim; (4.5-mm Thk)1
12***56Shim; (4.6-mm Thk)1
12***57Shim; (4.7-mm Thk)1
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191-0885 Rotating Gp-Motor -Hydrostatic Drive
11***70Ring-Retaining1
12***01Spring Set1
12***02Swashplate1
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278-8934 Rotating Gp-Motor -Hydrostatic Drive
11***70Ring-Retaining1
12***01Spring Set1
12***02Swashplate1
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278-4438 Rotating Gp-Pump -Hydrostatic Drive, Rh
20***71Kit-Seal; (Solenoid Valve)1
21***61Flange1
22***86Valve Group-Solenoid; (Implement Override)1
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278-4437 Rotating Gp-Pump -Hydrostatic Drive, Lh
25***95Sprocket-Track1
27***37Rotating Group-Pump; -Hydrostatic Drive, Lh1
3S***82Bolt; (5/8-18x1.84-In)27
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252-9136 Segment Gp-Sprocket
03***39Seal-O-Ring (Id=9.25mm)1
24***62Ring-Backup1
25***36Segment Group-Sprocket1
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266-2579 Valve & Mtg Gp-Solenoid -Outlet
06***40Seal-O-Ring (Id=37.69mm)1
10***17Seal-O-Ring2
10***41Plug1
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301-7890 Valve Gp-Check -Hydrostatic Drive Motor
09***33Ring-Retaining1
12***94Plug; (Break Off)1
12***69Plug1
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278-8937 Valve Gp-Flushing -Hydrostatic Drive
08***39Seal-O-Ring (Id=26.64mm)2
09***50Seal-O-Ring (Id=10.82mm)2
14***20Bolt-Socket Head; (M6x1x75-mm)4
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278-8936 Valve Gp-Motor Control -Hydrostatic Drive
16***15Retainer-Spring1
18***10Screw1
20***42Spring1
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278-4442 Valve Gp-Pump Control -Pressure, Flow Compensator
14***27Connector Group2
14***34Connector Group2
14***35Connect Group; (Each Includes)2
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6e-4402 Valve Gp-Relief -Charge Pressure-Hydrostatic Drive
14***09Plug20
14***26Plug2
31***29Case & Frame As1
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253-1803 Valve Gp-Transmission Control -Hydrostatic
09***18Nut (M6x1.0 Thd)4
15***20Cam-Latch1
21***43Shim; (1-mm Thk)1
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Service Equipment And Supplies
316-9830 Film Gp
22***13Film; (Warning) (Jump Start) (Inside Of Lh Battery Box Cover)1
22***90Film-Warning; (Seat Belt)1
22***15Film-Warning; (Universal, U.S.)1
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206-7281 Lines Gp-Diagnostic
13***59Plate-Identification; (Engine Stop, Run)1
13***58Film; (Identification) (On Radiator Filler Cap) (On Near Of Radiator Filler Cap)2
15***64Film; (Instruction) (Hydraulic Oil) (On Forward Of And Above The Hydraulic Tank Sight Gage On Tank Surface)1
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316-9918 Parts Gp-Miscellaneous
337-2172 Plate & Film Gp
206-7288 Plate & Film Gp
316-9832 Plate & Film Gp
Steering And Braking System
267-6709 Manifold & Valve Gp -Return Manifold-Hydrostatic Drive
15***00Film-Warning; (High Pressure Cylinder)1
16***79Cap; (Accumulator)1
16***80Core1
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Undercarriage
239-8212 Bar Gp-Equalizer
21***93Cap; (Track Roller)2
23***12Bar Group-Equalizer1
5P***47Washer (Bracket To Valve Support)4
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346-2870 Bar Gp-Equalizer
24***30Frame As-Lgp1
34***70Bar Group-Equalizer1
3B***89Fitting-Grease; (Fan And Alternator Drive)1
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218-4992 Cap Gp-Track Roller
21***92Cap Group-Track Roller; -Systemone1
24***31Frame As-Lgp1
3B***89Fitting-Grease; (Fan And Alternator Drive)1
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314-5996 Frame As-Track Roller -Lh
21***92Cap Group-Track Roller; -Systemone7
22***87Bearing-Sleeve1
22***98Bearing-Sleeve1
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314-5997 Frame As-Track Roller -Rh
21***92Cap Group-Track Roller; -Systemone7
22***87Bearing-Sleeve1
22***98Bearing-Sleeve1
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314-5992 Frame Gp-Track Roller -Lh
27***05Door As-Access2
27***49Cover As; (Rh)1
27***50Cover As; (Lh)1
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314-5993 Frame Gp-Track Roller -Rh
19***78Washer-Hard; (13.5x30x12-mm Thk)6
20***65Spacer; (15-mm Thk)20
21***74Guard As; (Front)4
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248-3918 Guard Gp-Recoil Mechanism
24***18Guard Group-Recoil Mechanism1
24***24Yoke As1
24***58Plate-Wear2
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239-8217 Guard Gp-Sprocket
14***33Seal Group-Duo Cone; (Duo Cone) (151page)2
16***31Ring; (Toric)2
23***17Guard Group-Sprocket1
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248-3927 Idler Gp-Front
23***29Link-Track38
24***27Idler Group-Front1
31***43Link As-Track Box; -Link Box20
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239-8211 Idler Gp-Track
23***11Idler Group-Track1
29***05Cartridge As-Track Link2
6Y***73Plug; (Clear)2
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311-6644 Link As-Track -Systemone
23***29Link-Track2
29***05Cartridge As-Track Link2
31***44Link As-Track; (Systemone)1
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311-6643 Link As-Track Box -Link Box
264-9766 Link As-Track Box -Link Box
1H***28Seal (3.73 In. Inside Diameter)2
23***58Shaft As2
26***66Link As-Track Box; -Link Box1
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239-8214 Pivot Bar Gp
19***44Bolt; (M10x1.5x20-mm)2
21***59Collar1
23***14Pivot Bar Group; -Xl1
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240-8933 Roller Gp-Track -Systemone
19***78Washer-Hard; (13.5x30x12-mm Thk)12
24***33Roller Group-Track; -Systemone1
27***85Guard As; (Rh)2
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227-5971 Roller Gp-Track Carrier -Heavy-Duty, Systemone
09***35Seal-Lip Type1
09***15Ring-Back-Up2
09***12Seal-O-Ring (Id=49.60mm)2
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271-6071 Scraper Gp-Idler
23***40Spring1
23***42Support1
23***43Spring Group-Recoil1
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239-8243 Spring Gp-Recoil
11***13Bolt-Hex Head; (M16x2x70mm)6
16***09Bolt-Hex Head; (Mj16x2.0x50mm)2
23***43Spring Group-Recoil1
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239-8247 Spring Gp-Recoil
23***29Link-Track2
23***33Shoe-Track40
23***72Bolt-Track; (M18x1.5x59-mm, Systemone)160
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239-8215 Track Adjuster & Recoil Gp
23***29Link-Track2
23***72Bolt-Track; (M18x1.5x59-mm, Systemone)160
23***73Nut-Track; (M18x1.5-Thd, Systemone)160
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277-2246 Track Gp -2-Required, Systemone
10***93Poppet2
21***03Plug As2
21***04Spring2
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235-2540 Track Gp -2-Required, Systemone
22***71Roller Group-Track Carrier; -Heavy-Duty, Systemone2
23***40Track Group; -2-Required, Systemone1
23***11Idler Group-Track2
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313-3608 Undercarriage Ar
Work Tools
289-8448 Blade & Edge Gp-Angling -Foldable
28***48Blade & Edge Group-Angling; -Foldable1
31***17Wiring Group-Engine1
31***32Plate & Film Group1
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294-3337 Blade Gp-Angling -Foldable
28***76Plate As1
28***77Plate As1
28***78Plate1
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250-2113 Control Gp-Winch
25***13Control Group-Winch1
29***19Edge-Cutting1
2J***06Nut Front Support To Frame; Nut-Front Support To Frame22
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248-6545 Conversion Ar-Winch
24***45Conversion Ar-Winch1
31***28Film; (Cat)2
31***29Film-Identification; (Caterpillar)1
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316-9833 Conversion Gp-Winch
14***18Connector As1
14***26Adapter; (Straight) (-4 Orb X -4 Orfs)2
14***67Elbow Group; (Each Includes)1
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288-9569 Cover Gp-Winch
11***36Clip3
12***62Washer; (19x34x3-mm Thk)2
12***30Fitting Group-Hydraulic; (Quick Disconnect)2
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294-4514 Edge Gp-Bit & Cutting
20***49Tank Group-Fuel1
20***85Suppression Ar-Sound; -Nacd1
20***88Plate & Film Group; -U.S.1
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D6K serial number reference

The PIN plate is a stamped metal tag riveted to the machine frame near the operator's cab, usually on the right-hand side; a duplicate is often stamped into the frame rail itself. The full Product Identification Number runs 17 characters — the first three letters are the model/configuration prefix, followed by a sequential unit number. Match the 3-letter prefix against the parts or service manual's serial-range coverage line to pin down the exact LGP/XL configuration and the engine tied to that build.

PrefixIdentifies
DHAD6K LGP (Low Ground Pressure)
FBHD6K XL

Frequently asked questions

What engine does the Caterpillar D6K use?

The original D6K runs the Cat C6.6 ACERT diesel, rated at roughly 93 kW (125 hp) net. Some lower-quality listings attribute a C7.1 ACERT to this model — that is a documented misattribution for this generation; the D6K's own factory documentation ties it to the C6.6 ACERT only.

What is the operating weight of the Caterpillar D6K?

Operating weight runs roughly 12.9 to 13.9 tonnes (28,400 to 30,700 lb) depending on undercarriage configuration and source — the XL sits toward the lighter end and the wider-shoe LGP toward the heavier end. Attachments and counterweight options shift the figure further.

What replaced the Caterpillar D6K?

Cat replaced it around 2012 with the D6K2, which kept the hydrostatic-drive concept but added updated grade-control electronics and moved to a later emissions-tier engine package. Sources do not agree on the exact engine code used in the D6K2, so treat its specifications as belonging to a separate machine, not an extension of the original D6K's C6.6 ACERT.

What D6K owners discuss

How does the D6K's hydrostatic drive feel to run day to day, and is it worth the extra complexity over a powershift dozer?
Owners describe the drive as smooth and step-less - track speed matches blade load automatically, and the seat-mounted joystick gives power turns or full counter-rotation without a separate steering lever. Operators who've run both configurations rate the hystat noticeably more productive than a torque-converter powershift machine in finish grading or any job with frequent direction reversals, since there's no shift shock and no converter slip to fight. The tradeoff mechanics flag: when a hydrostatic pump or motor does fail, the debris it throws downstream tends to make the repair bill much larger than a comparable powershift failure. Budget for regular hydraulic filter changes and fluid sampling rather than run-to-failure.
What undercarriage wear patterns and quirks come up most for the D6K?
Most D6K's ship with the sealed-and-lubricated SystemOne undercarriage, and owners report it holds up well against pin and bushing wear versus older sealed-and-lubricated designs, provided cycle times aren't pushed too hard running in reverse. A track frame built with the narrower roller/carrier-roller layout can't later be converted to heavy-duty (non-SystemOne) undercarriage - only the wider-frame layout allows that swap - and dealers often price the conversion near the machine's own value, so confirm frame type before buying if that flexibility matters. Field reports include pin seals starting to weep in the low thousands of hours (one case was handled under warranty), and on LGP shoes locating the master link during track separation is fiddlier than on older Cat undercarriage. Many wear components carry over from the prior D5M-era design, which helps parts availability.
Does the D6K's engine change across the model's lifespan?
Yes - this is a real generational split, not badge variance. The original D6K uses the Cat C6.6 ACERT, a Tier 3 engine rated around 93 kW (125 hp) net, and it is the only engine offered on this generation. The later D6K2 update moved to a higher-power engine with factory-mounted emissions aftertreatment on its final emissions tier; sources do not agree on the exact engine code for that generation, so treat it as a separate machine rather than an extension of the D6K's own C6.6 ACERT. Emissions-system complaints - DEF dosing faults, regen-related derates - trace to that later aftertreatment package and do not apply to the earlier C6.6 machines. Confirm which generation a given serial number belongs to before shopping for filters or troubleshooting a regen issue.
What electrical or sensor faults show up most often on the D6K?
Two recurring ones. First, a pilot-solenoid circuit fault (a code in the 133 range, current-above-normal) tied to the hydrostatic pilot circuit - root cause is usually a shorted coil or the positive feed wire chafed to ground, traced back to the machine ECM mounted behind the right-hand cab panel near the batteries; swapping the solenoid without checking harness continuity first is a common wasted trip. Second, false low-oil-pressure warnings and derates that clear after a restart and return within minutes - owners confirm the reading against a mechanical gauge before condemning the pump or bearings, since a flaky sender or connector is the more common culprit. A water-in-fuel sensor fault has also been reported staying active after a fuel filter change, pointing at the sensor rather than actual contamination. Because the first fault sits in the steering/pilot circuit, have your dealer verify hydrostatic response and ECM wiring before returning the machine to service.
What should I check before buying a used D6K?
Start with the undercarriage: check roller, idler and sprocket wear and look for weeping pin seals on SystemOne track, and confirm whether the frame is the narrower or wider layout since that decides whether heavy-duty undercarriage is an upgrade option later. Pull the fault code history rather than trusting a clear dash - active or recently-cleared emissions and pilot-solenoid faults are common enough on this model that a clean-looking dash doesn't rule them out. Cycle the hydrostatic controls through power turns and counter-rotation and feel for hunting, lag or harsh engagement, and check hydraulic fluid for contamination since a hystat failure is expensive to chase downstream. Confirm which generation the machine actually is, original D6K or the later D6K2, against its stated year and hour meter, since the engine, emissions troubleshooting, and parts all differ between them. Finally check the usual engine basics - oil and coolant leaks, exhaust smoke, blow-by - and cross-reference logged hours against undercarriage wear to catch a rolled-back meter.
What kind of fuel burn should I expect running a D6K in production dozing?
Owners report roughly 14-22 L/hr (4-6 gal/hr), with the low end for finish grading and idle-heavy work and the high end for sustained full-blade production dozing. Burn rate varies with load, terrain and operator habit as much as with which engine generation the machine carries, so treat any single number as a starting estimate rather than a guarantee for your site.
Is the D6K considered reliable compared with Cat's traditional powershift D6 models like the D6N or D6T?
Long-term owners report positive experience - one logged around 10,000 hours on a D6K2 XL over several years and called it capable and reliable for grading plus light-to-medium bulk dozing, nimble enough for soft or wet ground when the operator doesn't push it. Opinion is still split: some owners who've run both prefer the traditional torque-converter D6N for its simplicity and resale value, and a few have flagged concerns that undercarriage life on the K-series doesn't always match expectations. Where the hystat clearly wins is high-reversal work like finish grading, avoiding shift shock and outproducing a powershift machine; where a torque-converter machine still wins on some owners' books is long-haul simplicity and more predictable repair cost.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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