Caterpillartrack-type skiddertrack skidder

Caterpillar 517

Maintenance schedule, common problems & OEM parts breakdown

The Cat 517 is a track-type grapple skidder built for production forestry, skidding tree-length and full-tree loads to the landing over rough, wet, or steep ground where a rubber-tired skidder loses traction. Every 517 built, from the earlier 5WW-prefix serial range through the final 6PW-prefix machines, ran the same Cat 3304 DIT direct-injection turbocharged diesel, paired with a 3-speed powershift transmission and torque converter. Operating weight lands near 18,364 kg (40,450 lb), varying with grapple or winch fit. Cat offered it as a standard grapple skidder with a 2.74 m (9 ft) PAT blade, or as a cable/swing-boom skidder for steep-slope work. Production ran from the late 1990s to 2010.

Cat never re-engined the 517 across its run. Changes between the 5WW and 6PW serial ranges were incremental: refined undercarriage components, cab and guarding updates, and hydraulic tuning, not a new powertrain generation. Caterpillar ended the line around 2010 because the compact engine bay had no room for the larger block and aftertreatment a newer emissions-compliant engine needed, and skidder sales volumes were too low to justify a redesign. That freeze makes the 517 a known quantity on the used and parts market. One engine family, one transmission, and a track undercarriage shared with other Cat machines of the era keep parts sourcing and diagnostics straightforward for shops still running these on steep or wet ground jobs where cable and swing-boom skidders are hard to replace.

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 517 specifications

Overview / Configuration

Machine typeTrack-type (crawler) skidder, forestry/logging machine — grapple configuration standard, cable/swing-boom configuration offered for steep and mountainous terrain
Generation notesSingle documented generation. No Std/XL/LGP variants exist for this chassis (those designations apply to dozers, not skidders). Production spanned roughly late 1990s through about 2010
DiscontinuationProduction ended around 2010. The compact engine bay on this chassis could not accommodate a newer emissions-compliant engine, so the model line was retired rather than re-engined
Blade attachmentPower-Angle-Tilt (PAT) dozer blade fitted for site clearing and accumulating ahead of grapple skidding — a single blade width is documented; no S/SU/A/VPAT dozer-style blade lineup applies to this skidder

Engine

Engine modelCat 3304 DIT (direct-injection, turbocharged) diesel — used unchanged for the full production run of this model
Net flywheel power (SAE net)89.5 kW (120 hp)
Gross power101 kW (136 hp)
Displacement7.0 L (427 cu in), 4-cylinder
EmissionsNo emissions-tiered version of this engine was developed for this chassis; not certified to later Tier/Stage emissions standards

Transmission / Drivetrain

Transmission3-speed planetary power-shift transmission, 3 speeds forward and 3 reverse
Torque converterHeavy-duty torque converter matched to the engine for drawbar pull and skidding performance

Weights

Operating weight (grapple configuration)18,364 kg (40,450 lb)
Cable/swing-boom configuration weightNot published as a separate figure in available factory spec sheets — verify with dealer for the specific winch/boom arrangement fitted

Dimensions

Overall length5.74 m (18 ft 10 in)
Overall width2.92 m (9 ft 7 in)
Height to top of cab2.48 m (8 ft 1 in)
Ground clearance0.64 m (2 ft 1 in)
Track length on ground2.91 m (9 ft 7 in / 114.6 in)
Shoe width660 mm (26 in) as documented; other shoe widths not published
Track roller frame8 rollers per side documented for this configuration (also marketed as the "8-roller frame" version)
Track gauge (center to center)Not published in available spec sheets

Performance

Travel speed, 1st gear3.7 km/h (2.3 mph) forward / 4.6 km/h (2.8 mph) reverse
Travel speed, 2nd gear6.6 km/h (4.1 mph) forward / 8.0 km/h (5.0 mph) reverse
Travel speed, 3rd gear11.5 km/h (7.1 mph) forward / 14.2 km/h (8.8 mph) reverse
Ground pressureNot published as a standalone figure. Calculated from published operating weight and ground contact area: roughly 51 kPa (7.4 psi) — treat as an approximation, not a factory-quoted number
Drawbar pullNot published as a standalone figure for this model in available spec sheets. Factory literature states the torque converter and 3-speed transmission are matched specifically for high drawbar pull and skidding performance, without quoting a number
GradeabilityNot documented in available sources

Blade / Attachment Capacities

Blade typePower-Angle-Tilt (PAT) dozer blade — only configuration documented for this model
Blade width2.74 m (8 ft 11 in)

Grapple / Winch (Skidding System)

Grapple tong opening (tip to tip)2.13 m (6 ft 11 in)
Grapple opening areaApprox. 0.74 sq m (7.97 sq ft), per factory spec sheet
Auto-Grab hydraulicsMaintains constant tong clamping pressure automatically, compensating for shifting loads during skidding
Winch (cable/swing-boom configuration)Purpose-built single-drum winch for steep-slope and mountainous skidding, used with an available swing-boom and grapple arrangement
Winch drum diameter (bare)254 mm (10 in)
Max line pull, bare drumApprox. 306 kN (68,780 lbf)
Max line speedApprox. 40.5 m/min (132.9 ft/min)

Hydraulic System

System typeLoad-sensing hydraulic system with a variable-displacement, pressure-compensated pump that monitors and adjusts dozer-blade and grapple/winch power demand to cut parasitic horsepower loss and system heat

Service Capacities

Fuel tankApprox. 260 L (68.7 US gal), per aggregated factory spec data
Hydraulic system capacityNot published in available public spec sheets — verify with dealer or service manual
Engine oil capacityNot published in available public spec sheets — verify with dealer or service manual
Cooling system capacityNot published in available public spec sheets — verify with dealer or service manual

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

517 fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)19 L (5 US gal)Cat DEO (Diesel Engine Oil). Grade selected by ambient temperature: SAE 10W or 10W-30 in cold climates, SAE 30 or 15W-40 in warm climates, per Cat's engine-oil viscosity-by-temperature chart. Engine is the 3304 DIT diesel.
Cooling system38 L (10 US gal)Cat DEAC (Diesel Engine Antifreeze/Coolant), full-strength or mixed with water per Cat's glycol/water ratio guide for expected ambient low temperature; corrosion inhibitor maintained on interval. Later-production units may show Cat ELC (Extended Life Coolant) in place of DEAC.
Fuel tank260 L (69 US gal)No. 2-D diesel fuel; use a winter-blended or No. 1-D fuel in cold climates to prevent wax/gelling.
Transmission and torque converter (3-speed power shift)125 L (33 US gal)Cat TDTO (Transmission/Drive Train Oil), TO-4 performance level. Viscosity by climate: SAE 10W in cold ambient, up to SAE 30 or SAE 50 in warm ambient, per Cat's drive-train oil viscosity chart.
Bevel gear / steering compartmentNot a separate compartment on this machineThe 517 is a track-type skidder with hand-lever, oil-cooled multiple-disc steering clutches and brakes built into the final drive housings rather than a bevel-gear differential (as used on Cat's wheel-type skidders). No separate bevel-gear/steering refill line is published; steering clutch/brake oil is shared with the final drive fill, same Cat TDTO (TO-4) spec.
Final drives (each side)5.7 L (1.5 US gal) per sideCat TDTO (TO-4), viscosity by climate as above. Some sister models in this skidder line (e.g. 527) show a slightly higher per-side figure (about 6.5 L/1.7 gal) - final drive fill varies a little by model/series, verify against the specific machine's OMM.
Hydraulic system / tank (load-sensing system)29.5 L (7.8 US gal)Cat TDTO (TO-4) is the typical factory fill shared with the power-train oil-cooling circuit on this generation of Cat track machine. Cat HYDO (dedicated hydraulic oil) is an acceptable alternative where a machine's cooler circuit is not shared with the drive train.
Winch (517 CA cable-skidder winch, optional)74 L (19.5 US gal)Cat TDTO (TO-4); winch is a hydraulically actuated multiple-disc wet clutch/brake unit lubricated from its own sump.
Mechanical retrieval device (517 GR, optional, used with single-function arch)13.7 L (3.5 US gal)Cat TDTO (TO-4).
Pivot shaft / equalizer bar oscillation systemNot published as a separate refill figure in factory literature reviewedLarge pivot bushings run in a sealed oil-bath reservoir at the pivot shaft; equalizer bar saddle is a low-friction bushing fed by a remote lube line, and the recoil system is fully sealed and lubricated. Track rollers and idlers on the 517 are lifetime-lubricated and sealed - no periodic oil or grease service is called out for them in the specalog. Confirm exact pivot-shaft oil-level/fill procedure and fluid type against the machine's OMM.
Grease points (grapple/arch/swing-boom pins, equalizer-bar saddle, other open pin joints)Per standard grease-gun service interval, no bulk capacityCat Multipurpose Grease (NLGI 2) for normal climates; Cat's cold-weather or moly-fortified grease (e.g. Cat Ultra 5Moly-type product) where extreme cold or extreme-pressure pin/bushing loading is expected. Track pins/bushings and rollers are sealed and lifetime-lubricated and are not on the grease schedule.

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

Caterpillar 517 maintenance schedule

Service intervalTasks
Every 50 h
  • Check engine oil and coolant levels before each start.
  • Walk around and inspect grapple, blade, and winch/cable hydraulics for leaks daily.
  • Drain the fuel tank water separator daily.
  • Grease blade, grapple, and swing-boom pivot points weekly.
  • Check track tension and clear undercarriage debris weekly.
Every 250 h
  • Change engine oil and filter on the 3304 DIT.
  • Pull a transmission/torque converter oil sample for analysis.
  • Check and adjust track tension.
  • Grease all blade, grapple, and cylinder pin points.
  • Clean radiator and hydraulic oil cooler fins.
Every 500 h
  • Replace fuel filters and bleed the fuel system.
  • Change the hydraulic tank filter and breather.
  • Check final drive and transmission oil levels, top off as needed.
  • Inspect the PAT blade cutting edge, end bits, and mounting pins for wear.
  • Inspect winch cable or swing-boom hoses for fraying and chafe.
Every 1,000 h
  • Change transmission and torque converter oil.
  • Change final drive oil.
  • Inspect the turbocharger for shaft play and oil seepage.
  • Reset track chain tension and measure sprocket wear.
  • Inspect grapple arm, tong, and swing-boom pivot bushings for play.
Every 2,000 h
  • Check and adjust engine valve lash on the 3304 DIT.
  • Change hydraulic system oil.
  • Inspect and torque ROPS/FOPS mounting bolts.
  • Measure track chain, roller, and idler wear against factory limits.
  • Inspect torque converter and powershift clutch packs for wear.
Every 6,000 h
  • Change extended life coolant (ELC) in the cooling system.
  • Inspect and recalibrate fuel injectors on the 3304 DIT.
  • Rebuild or replace grapple and blade cylinder seals as wear dictates.
  • Inspect winch drum bearings and brake bands on cable-equipped units.

Servicing the 517 beyond the schedule

Predictive Maintenance & Fluid Analysis

Pull oil samples from the 3304 DIT engine, torque converter/transmission, and final drives at every 250-hour interval; the engine's turbo and injection pump show wear early in soot and fuel dilution readings. Hydraulic oil condition matters more on 517s running grapple and blade cylinders hard all shift. Watch coolant sample results for liner pitting, a known 3304 wear pattern in high-idle forestry duty cycles. On cable-equipped units, log winch gear oil condition separately since drum gearing loads differ from the grapple driveline.

Corrective & Common Repairs

Expect grapple cylinder seal and pin/bushing wear from constant load-and-swing cycling, plus PAT blade cutting edge and end bit replacement from grading skid trails. The 3304 DIT's turbocharger and injection pump are the common wear points on high-hour engines; injector calibration drift shows up as rough idle and blue smoke before it shows up on a gauge. Swing-boom and cable units need boom pivot bushing and cable drum brake band inspection beyond what a grapple-only 517 sees.

Overhaul & Rebuild Points

A 517 rebuild centers on the 3304 DIT long block, torque converter, and the 3-speed powershift clutches, all serviceable without pulling the cab. Undercarriage overhaul on the D5H-class chassis means measuring track chain, roller, and idler wear against factory limits before deciding on shoe/chain replacement versus a full track group rebuild. Grapple arm and tong pivots, plus swing-boom slew bearings on steep-terrain units, wear enough by mid-life to need bushing and pin kits at overhaul, not just field greasing.

Seasonal & Environment Servicing

517s work wet, cold, and steep ground, so winter startup means confirming coolant is rated for the region and checking engine block heater function before the 3304 DIT sees sub-zero starts. Track tension needs resetting more often in mud and snow than on dry ground; over-tight tracks in cold clay accelerate pin and bushing wear. Summer dust in slash and bark debris clogs radiator and hydraulic cooler fins fast, clean them more often than the standard interval calls for. Cable units need line inspection for ice glazing after wet-season storage.

517 common service parts

Part numberPart
6I-2499Filter Element As-AirCheck fitment →
6I-2500Filter Element As-AirCheck fitment →
132-8875Filter Element As-OilCheck fitment →
1R-0719Filter Element As-OilCheck fitment →
4T-3131Filter Element As-OilCheck fitment →

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

517 fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
Red coolant temperature warning lamp / gauge needle in red bandEngine coolant temperature has exceeded the safe operating range (commonly cited near 110C / 230F, varies by configuration).Low coolant level, clogged radiator core or slipping fan belt, faulty thermostat, or a failed coolant temperature sending unit.Idle the engine, check coolant level and radiator fins for debris, verify fan belt condition before resuming work.
Red engine oil pressure warning lamp / gauge needle in red bandEngine oil pressure has dropped below the minimum safe threshold.Low oil level, plugged oil filter, worn oil pump, or a failed oil pressure sending unit or switch.Shut down the engine immediately, check oil level and filter condition, verify the sending unit before restarting.
Red hydraulic oil temperature warning lampHydraulic system oil temperature is above the safe operating range.Low hydraulic oil level, clogged hydraulic oil cooler, sustained high load, or a failed cooler fan.Reduce hydraulic load, idle down, check oil level and clean cooler fins before continuing.
Red transmission / torque converter oil temperature warning lampPower train (torque converter and transmission) oil temperature exceeds the safe limit, commonly cited near 129C / 265F, varies by configuration.Low transmission oil level, plugged transmission oil cooler or filter, converter slippage from worn clutch packs, or extended high-load skidding without a cool-down period.Stop and idle to cool down, check oil level and filter, inspect the cooler for debris; sample the oil for metal content if overheating repeats.
Amber air cleaner restriction indicatorIntake air filter restriction has reached the service limit.Clogged primary or secondary air filter element.Service or replace the air filter element and reset the restriction indicator.
Amber charging system (alternator) warning lampBattery is not receiving charge from the alternator.Broken or slipping alternator belt, failed alternator, or a loose or corroded battery/charging circuit connection.Check belt tension and connections, test alternator output, and inspect wiring against the electrical schematic.
Low fuel level gauge / warningFuel level has dropped near empty.Normal fuel consumption, or a fuel gauge sender fault if the reading is erratic.Refuel; if the gauge reads incorrectly with fuel present, check the sender and its wiring.
Amber Diagnostic lamp illuminated together with red Warning lampGeneral monitoring-system alert pairing on the 517 dash flagging that one of the gauge circuits above is out of range or has a sensor fault.Any of the sensor or gauge faults listed above, or a wiring fault within the monitoring circuit itself.Check each gauge and lamp individually against operator manual limits, then use the electrical schematic to trace the affected circuit.

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

517 attachments & work tools

Blades

Standard front tool is a PAT (power angle/tilt) clearing blade, roughly 2.74 m (8.99 ft / ~9 ft) wide, run by a single lever that manages height, angle and tilt together. This is a skidder site-prep/clearing blade, not a production-dozer blade, so factory literature does not carry it under the S/SU/A pitch naming used on track-type tractors; a variable-pitch VPAT version is not documented for the 517 specifically, so treat any VPAT claim for this model as unconfirmed without dealer verification.

Rippers

No ripper work tool is documented in Cat sales literature for the 517 in either its grapple or cable configuration; ripper attachments (single- and multi-shank) are cataloged for same-size-class track-type tractors sharing D5-size undercarriage components, but a factory ripper linkage tied specifically to the 517 skidder frame is not confirmed in available sources. Verify shank count and weight with a dealer if a ripper is required.

Winches

The 517 is offered in a cable (winch) configuration built for steep, mountainous skidding, alongside the grapple configuration; the winch is described as purpose designed for this machine rather than shared off another model. Published figures show bare-drum max line pull of roughly 305 kN (about 68,800 lbf / 31.2 t) and max line speed near 40.5 m/min (132.9 ft/min) with a drum diameter around 254 mm (10 in); treat these as approximate/varies-by-configuration since they are not sourced from a factory spec sheet directly. Original winch-unit supplier is not identified in available sources.

Drawbars/counterweights

Cat's own product copy ties the 3304 DIT engine, heavy-duty torque converter and 3-speed powershift transmission together as delivering "more drawbar pull" for skidding, but no numeric drawbar-pull rating is documented in available sources for the 517. No separate bolt-on counterweight package is documented; the rear-mounted grapple arch or winch assembly itself adds mass over the drive sprockets and functions as the machine's rear ballast in this class.

Cab/ROPS guarding

The 517 uses an open ROPS/FOPS operator canopy typical of this Cat track-skidder product line, with front, rear and side wire screens plus screened doors to protect the operator from limbs and debris in forestry duty. Exact screen/guard fitment is not itemized per serial-number range in available sources, so confirm the guarding package against the specific machine's configuration.

Hydraulic arrangement (front/rear tools)

A load-sensing hydraulic system supplies both ends of the machine, reducing horsepower draw and system heat compared to a fixed-displacement circuit. A single control lever operates the grapple/tong (or blade) functions to cut operator workload; an extended track-roller frame shifts more track length rearward under the grapple/winch, improving stability when the rear tool is loaded. Circuit relief-pressure values for the front blade versus rear grapple/winch functions are not published in available sources and should be pulled from the machine's own hydraulic schematic.

All 517 assemblies by section

Every catalogued assembly group for the Caterpillar 517. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Air Inlet And Exhaust System
145-9106 Air Cleaner Gp
00***39Adapter-Pipe1
13***60Seal1
14***06Air Cleaner Group1
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150-3612 Air Cleaner Gp
15***12Air Cleaner Group1
2W***57Cup As-Air Cleaner1
6I***99Filter Element As-Air; (Primary)1
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7s-4994 Cap As-Rain
1w-3793 Fastener Gp-Exhaust Manifold
0S***14Bolt (.25" Diameter-.50" Long)2
1W***93Fastener Group-Exhaust Manifold; Exhaust Manifold Fastener Group1
2N***66Locknut; (3/8-16-Thd)(High Temperature)8
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142-0268 Guard Gp-Exhaust
14***46Guard As1
14***68Guard Group-Exhaust1
1F***48Nut 12.70 mm(.50 In.) Thread2
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139-2892 Lines Gp-Air
0L***52Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex)2
0S***88Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter4
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly1
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7n-4161 Elbow Gp-Exhaust
0S***90Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As)3
10***11Elbow-Exhaust1
1B***55Nut,Plain,Hexagon Turbocharger Mounting3
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6n-5393 Manifold Gp-Exhaust
6N***92Manifold (Exhaust)1
6N***93Manifold Group-Exhaust; Exhaust Manihold Group1
9Y***79Gasket Manifold Mtg Part Of Kit P/N 5r***262
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149-4346 Muffler Gp
0L***70Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case2
0S***88Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter2
13***64Muffler1
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121-7746 Precleaner Gp
12***46Precleaner Group1
13***43Clamp-Hose1
1M***50Bowl1
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164-6157 Prescreener Gp
12***46Precleaner Group1
16***40Screen As1
16***41Tube As-Inlet1
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139-1138 Turbocharger Gp
12***99Plate-Clamp; (Compressor)(Compressor)3
12***66Bolt Assem.6
13***37Cartridge Group-Turbocharger1
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138-2907 Turbocharger Gp
13***07Turbocharger Group1
13***38Turbocharger Group1
1P***51Gasket; (Turbocharger)1
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Basic Engine
1w-2872 Balancer Gp
03***35Bolt-Self Locking; 2.22cm(.875 In.) Lg4
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly4
1N***54Lock2
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1n-4436 Camshaft Gp
0S***09Bolt (3/4") Filler Tube Assembly To Transfer Drive Case2
1N***36Camshaft Group-Single; Single Camshaft Group1
7C***62Camshaft1
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2w-0102 Cover Gp-Cylinder Block
2A***98Pin,Straight,Headle Flywheel Housing2
2W***02Cover Group-Cylinder Block; Cylinder Block Cover Group1
4B***38Plug 28.95 mm(1.14 In.) Hole Dia.1
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2p-6528 Cover Gp-Front Housing
0S***66Bolt-Pulley To Crankshaft Adapter4
1W***42Housing,Coolant Pum Timing Cover1
2P***20Gasket-- Front Cover1
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8n-4446 Cover Gp-Valve Mechanism
0S***17Bolt --Use Open Hole In Compressor Body11
7S***13Reinforcement; (Valve Cover)7
8N***64Cover As-Cylinder Head1
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6n-8080 Crankshaft Gp
10***52Plate-Thrust2
19***32Kit-Basic Engine Repair; (Main Bearing)(Crankshaft)0
1W***05Gear-Crankshaft; (40-Teeth)1
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7n-6552 Cylinder Block As
10***11Insert-Liner Seat; (0.772-mm Thk)0
10***12Insert; (Liner Seat) (.822-mm Thk)0
10***13Insert-Liner Seat; (0.872-mm Thk)0
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1n-3574 Cylinder Block Gp
1N***74Cylinder Block Group1
1S***40Dowel; (30.23 mm X 9.37 mm)1
2A***98Pin,Straight,Headle Flywheel Housing2
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7n-6553 Cylinder Block Gp
1S***40Dowel; (30.23 mm X 9.37 mm)1
3S***96Seal-O-Ring; (9.53mm Id)1
4B***38Plug 28.95 mm(1.14 In.) Hole Dia.1
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7n-8874 Cylinder Head Gp
10***60Valve (Intake)4
10***65Insert-Valve Seat; (Exhaust)(Standard)4
10***68Insert-Valve Seat; (Inlet)(Standard)4
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1n-4304 Cylinder Head Gp
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly4
10***65Insert-Valve Seat; (Exhaust)(Standard)4
10***68Insert-Valve Seat; (Inlet)(Standard)4
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9n-5760 Damper Gp
1W***78Spring; (35.7mm Long)2
1W***79Spring; (54.6mm Long)2
4B***73Screw-Machine; (10-24x0.5-In)2
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6i-1084 Drive Gp-Fan -Belt
1P***99Bracket1
1P***45Bracket Assem, Including:1
1P***46Shaft-Fan1
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7n-9534 Fastener Gp-Cylinder Head
1B***09Bolt-- Head To Cylinder Block3
1D***95Bolt (5/8-11x6in); (5/8-11x6-In)14
2S***36Washer,Flat Cover Assembly Mounting And Flywheel Housing Cover17
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8n-0872 Fastener Gp-Front Housing
0L***70Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case20
1C***51Bolt--Installation Of 2v***26 Retainer2
3E***14Bolt; (3/8-16x0.87-In)6
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2p-6189 Fastener Gp-Oil Pan
03***57Bolt; --To Reverse Shaft Bearing Retainer & Forward Shaft Bearing Retainer12
0L***43Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender1
0S***91Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***8217
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7s-7877 Flywheel Gp
2L***01Bolt; (5/8-18x1.5-In)9
7N***45Gear ( 130 Teeth )1
7S***77Flywheel Group; Flywheel Group1
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1w-4563 Gear Gp-Front
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly2
0S***18Bolt; (5/16-18x1-In)(Hydraulic Pump)2
0S***48Bolt,Machine Camshaft Gear Mounting4
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1w-5723 Housing Gp-Flywheel
0S***87Bolt-Bracket Assembly To Timing Gear13
1W***23Housing Group-Flywheel1
1W***24Housing-Flywheel1
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8n-0303 Housing Gp-Front
1W***00Gasket Timing Gear Cover1
1W***16Plate As-Front1
5M***14Pipe Plug Cylinder Block Oil Pressure1
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6n-9378 Pulley Gp-Crankshaft
2W***16Hub1
5S***48Washer-Special1
6N***78Hub Group-Crankshaft1
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7n-7858 Lifting Gp-Engine
6V***99Bolt; (5/8-11x38.1mm)4
7N***58Lifting Group; Lifting Eye Gp-Engine1
8D***54Washer,Flat Electric Starting Motor Group4
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7e-3993 Mounting Gp-Engine Flexible
0S***87Bolt-Bracket Assembly To Timing Gear12
2B***47Bolt (1/2" X 2 1/4") Rops Mounting Bracket To Cover Assembly6
3B***53Bolt- 114.30 mm(4.50 In.) Long4
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2p-6155 Pan Gp-Oil -Engine
11***36Adapter As-Drain1
12***83Plug-Drain; (Engine Oil Pan)1
2P***51Plate As-Oil Pan1
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1w-6588 Piston & Rod Gp
12***59Body As-Piston; (Requires 3mm Oil Ring)1
1P***56Bolt,Shoulder Connecting Rod2
1S***43Ring,Retaining Piston Pin2
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6i-1379 Pulley Gp-Fan Drive
0L***43Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender6
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly6
2P***06Adapter-Fan1
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2p-6224 Seal Gp-Crankshaft
2P***24Seal Group-Crankshaft; Crankshaft Seal Group1
4W***52Seal Group-Crankshaft; (Counter Clockwise Rotation)1
9Y***95Seal Group-Crankshaft; (Clockwise Rotation)1
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1w-1830 Support Gp-Engine
0S***73Bolt (102mm Long); (1/2-13x4-In)6
1W***30Support Group-Engine; Engine Support Group1
2P***92Seal (Id=133.02mm)1
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7n-8024 Valve Mechanism Gp
0L***26Plug -13mm(.512 In.) Outside Dia.2
1B***03Nut Exhaust Pipe To Starting Engine Cylinder Block8
1B***09Bolt-- Head To Cylinder Block1
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Cooling System
6i-1378 Cooler Gp-Fltr Base & Eng Oil
0L***43Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender1
0S***88Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter3
0S***17Bolt --Use Open Hole In Compressor Body2
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6i-1377 Cooler Gp-Fltr Base & Eng Oil
0L***52Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex)1
0S***91Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***821
1R***07Filter As-Engine Oil; (Advanced Efficiency)1
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7n-7072 Fan Gp-Blower
4N***71Spider Assem.1
5M***62Bolt; (3/8-16x0.75-In)8
6V***01Nut; (3/8-16-Thd)(Plate To Rh And Lh Bracket As)2
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7n-1315 Housing & Regulator Gp
0S***88Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter2
0T***65Bolt--3/8" X 3 1/2"--Use As Required; Bolt 5t***56 Plate To Cover Gp 4n***722
11***10Regulator-Water Temperature; (91 Deg Celsius)1
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2w-6779 Lines Gp-Water -Bypass Relief
0S***90Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As)1
0S***19Bolt,Machine Gear Retaining Part Of Kit P/N 1w***462
0T***65Bolt--3/8" X 3 1/2"--Use As Required; Bolt 5t***56 Plate To Cover Gp 4n***721
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8n-4112 Lines Gp-Water -Bypass Relief
7N***72Elbow1
7X***31Plug-Pipe; (Flywheel Housing Drain)3
8N***12Lines Group-Water; -Bypass Relief1
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155-0068 Pump Gp-Water
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold2
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly1
14***91Shaft-Water Pump1
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7n-5909 Pump Gp-Water
0T***55Bolt; (3/8-16x4.25-In)(Location S)2
15***68Pump Group-Water1
5F***06Packing,Preformed Pump Mtg Part Of Kit P/N 5r***251
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172-7767 Pump Gp-Water
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold2
15***82Seal-Lip Type1
16***50Seal Group; (Water Pump)1
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145-9108 Radiator Gp
14***08Radiator Group1
14***02Radiator Group1
1W***20Block2
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147-0702 Radiator Gp
14***02Radiator Group1
16***63Tank As-Radiator1
2W***55Strap As (To Core As)4
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Electrical And Starting System
9g-9813 Alarm Gp -Action
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***35Pin-Connector; (16-Ga To 18-Ga)2
5P***23Wire 4.55m (Br/Bk2); (1-Conn. Ether Starting System Sending Unit / 1-Conn. Solenoid Valve Ether Start System)0
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244-1090 Alarm Gp
03***12Screw-Forming; (10-24x0.5-In)4
10***31Fan-Alternator; (11-Blade)1
10***32Collar; (Alternator)1
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114-2401 Alternator Gp-Charging
06***46Spacer; (.546x.840x1.72 In Thk)1
11***01Alternator Group-Charging2
1F***48Nut 12.70 mm(.50 In.) Thread1
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133-7664 Alternator Gp-Charging
13***64Alternator Group-Charging1
18***38Collar2
18***39Fan As; (Alternator)1
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177-9953 Alternator Gp-Charging
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***05Kit-Receptacle; (6-Pin)(Display Monitor Harness)1
10***16Switch As-Pressure; (Ems Arming)1
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139-5841 Battery & Wiring Gp
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***05Kit-Receptacle; (6-Pin)(Display Monitor Harness)1
10***16Switch As-Pressure; (Ems Arming)1
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159-4563 Battery Gp
15***63Battery Group1
6N***04Cap As-Dust; (Jacket Water Heater Elements)1
9G***57Element As-Jacket Water Heater; (120-Volt, 1250-Watt)1
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8r-8714 Battery Gp -Cold Weather
3T***60Battery2
8R***14Battery Group; -Maintenance Free1
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4n-3586 Heater Gp-Jacket Water
4N***86Heater Group-Jacket Water; (120v)1
7N***79Socket-Governor Solenoid Wire To Housing2
7N***80Pin-Connector; (14-Ga To 18-Ga)1
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8c-9678 Lamp Gp-Dome
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
14***82Screw; (7.4x20-mm)2
14***83Seal1
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112-9378 Lamp Gp-Flood
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
11***78Lamp Group-Flood; -Suspended Mount1
14***89Screw; (M6.5x40-mm)4
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242-3517 Lamp Gp-Flood
11***78Lamp Group-Flood; -Suspended Mount7
13***69Screen As1
13***49Screen As1
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134-9649 Lighting Gp-Flood -Rops
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
13***49Lighting Group-Flood; -Rops1
15***01Tube1
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133-7447 Lighting Gp-Flood
11***78Lamp Group-Flood; -Suspended Mount7
13***47Lighting Group-Flood; -Rops1
13***52Plate1
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152-8126 Starting Aid Gp-Ether
15***26Starting Aid Group-Ether2
4N***86Heater Group-Jacket Water; (120v)1
8R***14Battery Group; -Maintenance Free1
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152-8125 Starting Ar -Cold Weather
10***55Starting Motor Group-Electric1
15***25Starting Ar; -Cold Weather1
4H***69Gasket Starter Mtg Part Of Kit P/N 5r***251
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207-1560 Starting Motor Gp-Electric
03***23Bolt; (1/4-28x1-In)5
20***60Starting Motor Group-Electric1
25***79Kit-Solenoid; (24-Volt)(Starting Motor)1
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6v-5538 Starting Motor Gp-Electric
5C***74Nut (M5x.8 Thd); (M5x0.8-Thd)2
6V***38Starting Motor Group-Electric1
7X***62Washer-Hard; (13.5x19x0.8-mm Thk)5
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207-1561 Starting Motor Gp-Electric
20***61Starting Motor Group-Electric1
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)1
4B***43Nut,Plain,Hexagon Plate Mtg2
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1w-3851 Starting Motor Gp-Electric
1W***51Starting Motor Group-Electric1
5C***74Nut (M5x.8 Thd); (M5x0.8-Thd)2
7X***62Washer-Hard; (13.5x19x0.8-mm Thk)5
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6v-5207 Starting Motor Gp-Electric
3E***25Cover As; (Starting Motor)1
3E***27Kit-Bearing; (Starting Motor)(Incl Bearing Seals & Spacers)1
3E***28Kit; (Brush) (Includes O-Rings, Screw, Spring, & Brush)1
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207-1554 Starting Motor Gp-Electric
03***23Bolt; (1/4-28x1-In)5
19***70Solenoid As-Starting Motor; (24-Volt)(Starting Motor)1
20***54Starting Motor Group-Electric1
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207-1555 Starting Motor Gp-Electric
20***55Starting Motor Group-Electric; (Delco Remy)1
20***61Starting Motor Group-Electric1
6V***38Starting Motor Group-Electric1
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6v-5226 Starting Motor Gp-Electric
10***52Starting Motor Group-Electric1
6V***26Starting Motor Group-Electric1
6V***37Starting Motor Group-Electric1
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6v-5227 Starting Motor Gp-Electric
03***21Shim Lever Housing1
03***23Bolt; (1/4-28x1-In)5
2H***29Ring - Retaining External1
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106-8555 Starting Motor Gp-Electric
10***55Starting Motor Group-Electric1
20***55Starting Motor Group-Electric; (Delco Remy)1
6V***26Starting Motor Group-Electric1
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6v-5023 Starting Motor Gp-Electric
03***21Shim Lever Housing1
03***23Bolt; (1/4-28x1-In)5
2H***29Ring - Retaining External1
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6v-5537 Starting Motor Gp-Electric
3E***25Cover As; (Starting Motor)1
3E***27Kit-Bearing; (Starting Motor)(Incl Bearing Seals & Spacers)1
3E***28Kit; (Brush) (Includes O-Rings, Screw, Spring, & Brush)1
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106-8552 Starting Motor Gp-Electric
10***52Starting Motor Group-Electric1
6V***23Starting Motor Group-Electric1
6V***07Starting Motor Group-Electric1
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7n-0718 Switch Gp-Disconnect -Battery
6V***62Screw-Machine; (8-32x0.31-In)4
7N***18Switch As-Disconnect; -Battery-Ground Level1
7T***99Nut-Mounting; (1-32-Thd)1
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164-7577 Switch Gp-Bypass -Power Train Oil Filter
16***77Switch Group-Bypass; -Xmsn Lubrication Supply Filter-Xmsn Lubrication Charge Filter-Hoist Screen-Tc, Front Brake Cooling-Transmission Oil Filter-Rear Axle Oil Filter1
2H***22Lockwasher2
6F***45Nut-Full; (3/8-24-Thd)2
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9x-7781 Switch Gp-Bypass -Power Train Oil Filter
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***35Pin-Connector; (16-Ga To 18-Ga)2
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)1
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9g-7641 Switch Gp-Start -Engine, Key
24***90Alarm Group; -Backup1
3S***93Strap-Cable-To Tie Harnesses Together2
3W***11Switch As; (Neutral Start)1
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139-5845 Warning Gp-Backup
06***36Tube2
13***32Wire As1
13***78Cap; (Fuse Holder)1
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153-5945 Wiring Gp-Console
03***33Washer; (0.516x1x0.12-In Thk)2
15***45Wiring Group-Console1
2K***11Pin (Spring-Outer)1
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Engine Arrangement
138-2296 Engine Ar
12***84Protection Group-Fuel System1
13***79Lines Group-Fuel Injection1
13***96Engine Ar1
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138-2297 Installation Ar-Engine
13***64Alternator Group-Charging1
13***97Installation Ar-Engine1
14***06Air Cleaner Group1
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Frame And Body
8e-8090 Case & Frame Gp
12***64Pin2
12***65Handle As2
12***66Pin1
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149-4342 Enclosure Gp-Engine
14***42Enclosure Group-Engine1
15***16Plate1
15***35Cover As1
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151-6441 Enclosure Gp-Fender
15***41Enclosure Group-Fender1
15***37Plate2
15***38Fender As1
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151-6439 Fender Gp
15***39Fender Group1
3W***37Support Assem. (L.H.)1
3W***30Support Assem. (R.H.)1
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8e-5543 Floorplate Gp -Open Rops
3W***37Support Assem. (L.H.)1
3W***30Support Assem. (R.H.)1
3W***13Floorplate1
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8g-2999 Floorplate Gp -Enclosed Rops
6Y***25Spacer6
7X***44Bolt-Plt; (5/8unc X 1 3/8)6
7X***72Washer-Hard; (10.2x25.5x2.5-mm Thk)2
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9u-8328 Guard Gp-Bottom
16***50Guard As2
9U***28Guard Group-Bottom1
9W***75Bar1
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169-2647 Guard Gp-Lines
14***99Guard As1
14***00Grill As1
14***01Bar As1
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147-6905 Guard Gp-Radiator
14***05Guard Group-Radiator1
14***39Hood As1
14***21Guard As1
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149-4340 Hood Gp
14***40Hood Group1
1P***72Spacer; (1.031x1.219x0.75-In Thk)4
2H***91Nut2
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133-7601 Mounting Gp-Sweeps
03***12Rivet (To Fuel Tank)5
13***01Mounting Group-Sweeps1
3W***97Strip1
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9n-4812 Panel Gp-Side
14***12Sweep As-Rh1
14***13Sweep As-Lh1
14***14Screen1
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149-8416 Screen Gp-Sweeps
14***16Screen Group-Sweeps1
3W***22Step Assem.; (R.H.)1
3W***26Step Assem.; (L.H.)1
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152-0971 Step Gp
13***66Plate As2
13***68Cover As2
14***45Handle As1
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3w-0851 Step Gp
2K***73Locknut Inside Guard Assembly4
3W***51Step Group; Step Group1
6Y***47Step As1
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9n-4821 Step Gp
15***70Step As1
15***73Step As1
16***41Plate As; (Rh)1
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147-6894 Sweep Gp
14***94Sweep Group1
16***25Bracket As1
1K***85Ring Part Of Kit P/N 1w***464
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Fuel System
7w-5928 Pump Gp-Fuel Injection
0S***15Bolt 19 mm (.75 In.) Long Return Air Console To Enclosed Rops4
11***18Seal-O-Ring; (26.64mm Id)4
13***41Camshaft As1
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131-2940 Pump Gp-Fuel Injection
0S***15Bolt 19 mm (.75 In.) Long Return Air Console To Enclosed Rops2
13***40Pump Group-Fuel Injection1
1W***69Piston1
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1w-3597 Torque Control Gp
1W***97Torque Control Group1
7N***79Socket-Governor Solenoid Wire To Housing1
7N***80Pin-Connector; (14-Ga To 18-Ga)1
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8g-3913 Control Gp-Decelerator
1A***90Washer [1.66mm(.0650 In.)Thick]2
1B***06Key-Woodruff1
3B***07Cotter--Yoke Assembly2
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111-5162 Control Gp-Fuel Ratio
10***93Washer1
11***62Control Group-Fuel Ratio (Basic)1
11***58Washer; (12.7x6.65x0.79-mm Thk)1
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153-8486 Control Gp-Governor
03***25Coupler1
09***15Washer-Hard; (20x35x1.6-mm Thk)1
15***86Control Group-Governor1
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1w-2481 Cover Gp-Tachometer Drive
0S***15Bolt 19 mm (.75 In.) Long Return Air Console To Enclosed Rops2
1W***81Cover Group-Tachometer Drive; Tachometer Drive Cover Group1
4M***03Packing,Preformed Hourmeter Mtg1
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7c-8995 Fastener Gp-Fuel Inj Pump
0S***14Bolt (.25" Diameter-.50" Long)2
2S***83Bolt (3.25" Long-Drilled Head)1
4F***57Screw,Cap,Hexagon H Shock Mount To Bracket6
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6i-1382 Filter & Lines Gp-Fuel
03***42Elbow Hose Assembly To1
03***47Elbow-Filtered Fuel From Based Assembly2
06***39Seal-O-Ring1
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7c-8612 Governor Gp
03***16Bolt-Self Locking; (1/4unc X 3/4)3
0S***16Screw,Cap,Hexagon H Receptacle Mtg; Bolt Brackets To Firewall Assembly6
13***07Seal-Lip Type; (6.39mm)1
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151-6440 Lines Gp-Fuel
06***35Fitting-Pipe1
12***74Clip-Loop; (12.7mm Id)1
15***40Lines Group-Fuel1
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4p-9960 Lines Gp-Fuel Injection
06***58Seal-O-Ring; (Oil Pan Drain Plug)1
0S***71Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting2
0S***08Bolt-Support To Starting Engine Timing Gear Housing1
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4p-9950 Lines Gp-Fuel Injection
1W***11Spacer; (10.5x22x73.5-mm Thk)1
1W***67Clamp As-Fuel Line (With Spacer)2
1W***68Clamp-Fuel Line; (Non-Threaded)(Thru Hole)5
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130-2779 Lines Gp-Fuel Injection
12***94Bolt-Tamperproof; (28.58mm)1
12***96Bolt-Tamperproof; (95.25mm)1
13***79Lines Group-Fuel Injection1
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128-7984 Protection Gp-Fuel System
12***84Protection Group-Fuel System1
1W***95Pump Group-Fuel Transfer1
4B***65Screw,Cap,Hexagon Fuel Injection Pump1
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1w-1695 Pump Gp-Fuel Transfer
03***79Seal-O-Ring (Id=10.82mm)1
11***62Control Group-Fuel Ratio (Basic)1
11***49Setscrew-Socket1
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2w-4160 Pump & Mtg Gp-Fuel Transfer
1W***87Valve As-Check; (Fuel Injection Pump)1
1W***71Bonnet-Valve1
2W***60Pump Group-Fuel Transfer & Mtg; Fuel Transfer Pump And Mounting Group1
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139-1206 Pump Gp-Gov & Fuel Inj
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
13***06Pump Group-Gov & Fuel Inj1
15***08Tank As1
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151-6438 Tank Gp-Fuel
15***38Tank Group-Fuel1
1P***52Insulator,Bushing Governor1
2P***85Spacer (.635 mm Thk); (0.635-mm Thk)1
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Hydraulic System
100-6174 Cylinder Gp-Angling
10***74Cylinder Group-Angling1
16***95Seal As-Buffer1
16***04Seal-U-Cup1
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6e-0365 Cylinder Gp-Lift
13***62Kit-Hydraulic Cylinder Seal1
16***95Seal As-Buffer1
16***04Seal-U-Cup1
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9t-9557 Cylinder Gp-Tilt
13***77Control Group-Hydraulic; -Blade Angle1
13***78Control Group-Hydraulic; -Bulldozer Lift1
13***81Control Group-Hydraulic; -Bulldozer Tilt1
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138-2327 Hydraulic Ar
13***27Hydraulic Ar1
1K***72Locknut Horn To Guard6
2K***73Locknut Inside Guard Assembly2
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8g-4485 Lines Gp-Angle & Tilt
10***78Hose As1
12***94Hose Assem.1
14***38Elbow1
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1u-2387 Lines Gp-Angle & Tilt
1U***87Lines Group-Angle & Tilt; Angle And Tilt Lines Group1
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)4
3P***03Clip--(Tab)1
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153-6785 Lines Gp-Hydraulic Pump
15***85Lines Group-Hydraulic Pump1
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)6
3P***03Clip--(Tab)2
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8g-4484 Lines Gp-Lift Cylinder
14***27Plate As1
1F***50Nut Rops Support16
4L***37Hex Head Capscrew, 3/8 Nc X 1 1/2 In. (38 mm)3
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135-1983 Mounting Gp-Control Valve
13***83Mounting Group-Control Valve1
4T***31Retainer2
4T***25Pin2
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3g-8931 Pin Gp
00***69Cup-Roller Bearing1
00***71Cone-Bearing1
00***14Ring-Retaining; (Internal)1
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148-0285 Pump Gp-Piston -Implement
00***55Ring-Retaining1
14***85Pump Group-Piston; -Implement1
3T***49Bolt-Socket Hd; (M6 X 1.0 X 25)4
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6e-6569 Rotating Gp-Pump -Implement
0S***20Bolt--Customer Grounding Bolt4
12***45Screen As; (Steering Tank)1
13***75Filter Element As-Oil; (Ultra High Efficiency)(Cleanout/High Efficiency)1
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151-7324 Tank & Filter Gp-Hydraulic
13***38Cover-End1
15***24Tank & Filter Group-Hydraulic1
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)2
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6e-4781 Valve Gp-Bank -Bulldozer
03***14Bolt-Self Locking; (1/4unc X 1/2)2
03***85Bolt 5t***57 Plate As To Fuel Pump Group1
12***76Seat As-Shuttle1
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6e-4953 Valve Gp-Control -Bulldozer Tilt
03***14Bolt-Self Locking; (1/4unc X 1/2)2
03***85Bolt 5t***57 Plate As To Fuel Pump Group1
12***76Seat As-Shuttle1
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6e-4954 Valve Gp-Control -Blade Angle
03***14Bolt-Self Locking; (1/4unc X 1/2)2
10***63Spacer-Detent1
10***64Spring1
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6e-4955 Valve Gp-Control -Bulldozer Lift
4K***88Seal; Adapter To Oil Pump Outlet Manifold1
6E***55Valve Group-Control; -Bulldozer Lift1
7M***01Dowel (2" Long)1
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6e-6568 Valve Gp-Pump Control -Implement
4K***88Seal; Adapter To Oil Pump Outlet Manifold1
5K***90Seal-To Hydraulic Cooler Inlet Port1
6E***58Ring-Back-Up1
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6e-0772 Valve Gp-Relief -Implement Pilot Oil
1J***53Pin-Spring2
1P***16Seal-O-Ring; (11.63mm Id)4
21***83Orifice-Screen1
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9t-6695 Valve Gp-Makeup -Implement Pilot Oil
03***27Seal-O-Ring; (19.18mm Id)1
03***36Seal-O-Ring1
3J***07Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve3
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8p-3044 Valve Gp-Selector & Press Cont -Transmission
10***74Cylinder Group-Angling2
16***47Guard Group-Lines1
1U***87Lines Group-Angle & Tilt; Angle And Tilt Lines Group1
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Implements
151-5799 Bulldozer Ar-Angling
10***39Pin2
15***99Bulldozer Ar-Angling1
2G***75Washer; (1.78x4x0.19-In Thk)(4.78mm .188in Thk)4
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8e-9985 C-Frame Gp-Power Angling
3B***85Fitting-Hydraulic; Fitting 45 Degrees Angle--Used As Required2
3G***32Pin2
4J***05Washer; (1.781x2.5x0.12-In Thk)6
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8e-2737 Singletree Gp
11***93Plate; (Instruction) (On Right Side Behind Cab Door)1
13***00Condenser & Mtg Group-Refrigerant1
13***30Air Conditioner Group1
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Lubrication System
1n-4297 Guard Gp-Vandalism
0S***91Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***821
1N***97Oil Level Gauge Protection Group; Oil Level Gauge Protection Group1
2A***11Washer; (5.5x12.3x0.8-mm Thk)1
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7e-8764 Base Gp-Oil Filter
0S***18Bolt; (5/16-18x1-In)(Hydraulic Pump)2
1B***90Bolt; (5/16-18x1.375-In)(Rh Front Cover)2
2P***37Stud Engine Oil Filter1
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1p-4244 Breather Gp
1P***44Breather Group1
2W***62Breather As-Crankcase; (Engine)1
3H***43Bolt,Machine Breather Assembly To Cover1
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159-0673 Fumes Disposal Gp
15***73Fumes Disposal Group1
4D***88Clip-(Slot To Fit Fastener M10 Or 3/8)1
4M***25B. 5/16 N.C. X 1"1
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138-8083 Gauge Gp-Oil Level (Dipstick) -Engine
13***80Tube As-Guide1
13***83Gauge Group-Oil Level (Dipstick); -Engine1
3B***15Bolt Guard Assembly To Accessory Drive Housing1
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2p-6512 Lines Gp-Engine Oil
0L***64Lock --To Reverse Driven Gear Splash Pan; -- To Reverse Driven Gear Splash Pan1
0L***70Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case1
0S***71Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting1
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8n-2594 Lines Gp-Turbocharger Oil
0L***43Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender2
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine1
0S***17Bolt --Use Open Hole In Compressor Body2
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6n-2642 Pump Gp-Engine Oil
0S***90Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As)1
1P***46Washer-Hard; (10.2x35x6-mm Thk)1
6I***46Pump Group-Engine Oil1
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6i-1346 Pump Gp-Engine Oil
0T***65Bolt--3/8" X 3 1/2"--Use As Required; Bolt 5t***56 Plate To Cover Gp 4n***723
1B***09Key,Woodruff No. 10 Oil Pump1
1F***06Dowel1
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2p-1784 Pump Gp-Engine Oil
0S***90Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As)3
0S***19Bolt,Machine Gear Retaining Part Of Kit P/N 1w***461
2P***84Pump Group-Engine Oil; Engine Oil Pump Group1
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Machine Arrangement
138-2326 Chassis Ar
13***52Rops Group1
13***26Chassis Ar1
13***41Battery & Wiring Group1
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151-4961 Common Ar
13***96Engine Ar1
13***97Installation Ar-Engine1
13***24Power Train Ar1
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Operator Station
153-1803 Air Conditioner Ar
10***06Coil-Evaporator1
15***03Air Conditioner Ar1
1V***13Clip (Small)1
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136-2730 Air Conditioner Gp
11***94Wheel-Blower; (Ccw)1
11***95Wheel-Blower; (Cw)1
13***30Air Conditioner Group1
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6t-3387 Blower Gp-Cab
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
13***00Clip; (Tab)2
15***70Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)1
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8g-7277 Tank Gp-Window Washer
151-6471 Cab Ar -Enclosed Rops
13***47Lighting Group-Flood; -Rops1
13***01Mounting Group-Sweeps1
13***66Screen Group-Protection1
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151-6470 Cab Ar-Enclosed Rops
13***62Seat Group; -Vinyl1
13***49Lighting Group-Flood; -Rops1
13***79Liner Group-Cab1
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151-6469 Cab Ar-Open Rops
00***92Screw-Washer Head; (1/4-20x0.5-In)4
09***37Spacer; (12-mm Thk)3
10***56Seal0
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151-1348 Cab Gp -Enclosed Rops
00***92Screw-Washer Head; (1/4-20x0.5-In)4
10***56Seal0
12***19Seal; (177-cm Each)0
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152-7558 Compressor Gp-Refrigerant
10***27Condenser Group-Refrigerant; -With Fans-Rops Mounted-Remote Mounted1
13***00Bracket As1
13***30Harness As1
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3e-1906 Compressor Gp-Refrigerant
10***12V-Belt; (Air Conditioner Compressor)1
10***13Bracket1
10***81Bearing-Special Ball2
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136-2700 Condenser & Mtg Gp-Refrigerant
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
12***90Harness As-Heater & Air Cond; (Condenser Blower Motors)1
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103-9527 Condenser Gp-Refrigerant -With Fans
03***55Locknut; (5/16-18-Thd)(Marked X)1
10***27Condenser Group-Refrigerant; -With Fans-Rops Mounted-Remote Mounted1
13***22Lever As1
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133-7381 Control Gp-Hydraulic -Bulldozer Tilt
133-7377 Control Gp-Hydraulic -Blade Angle
13***77Control Group-Hydraulic; -Blade Angle1
1B***76Pin,Straight,Headed Governor And Decelerator Control2
2K***73Locknut Inside Guard Assembly1
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133-7378 Control Gp-Hydraulic -Bulldozer Lift
03***55Locknut; (5/16-18-Thd)(Marked X)3
13***78Control Group-Hydraulic; -Bulldozer Lift1
1B***76Pin,Straight,Headed Governor And Decelerator Control3
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8g-4330 Control Gp-Steer Clutch & Brk
153-8485 Control Gp-Transmission
9n-4236 Gauge & Warning Gp
7x-1999 Heater Gp-Cab -Open Rops
6t-3388 Heater Gp-Cab -Enclosed Rops
134-9653 Heater Gp-Cab -Open Rops
108-4582 Housing Gp-Seat Suspension
152-5833 Installation Gp-Cable
9u-8995 Installation Gp-Radio
148-8949 Instrument Gp -Open Rops
134-1131 Instrument Gp
8e-8368 Liner Gp-Cab
135-2179 Liner Gp-Cab
153-2206 Lines Gp-Air Conditioner
134-9650 Lines Gp-Heater
9p-9392 Mirror Gp-Rear View -Open Rops
8e-8706 Mirror Gp-Rear View
224-6185 Motor Gp-Window Wiper -Front, Rear
8g-4535 Mounting Gp-Cab
136-3711 Mounting Gp-Rops
148-5676 Mounting Gp-Rops
108-8421 Pan Gp-Backrest -Lumbar
8y-5992 Pan Gp-Seat
6v-6561 Wiper Pivot Gp
20***23Cap; (Wiper)1
3F***56Lockwasher; (8.43x15.5x0.76mm Thk)1
5C***61Nut (M8x1.25 Thd); (M8x1.25 Thd)1
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151-1345 Platform Gp-Operator
143-3310 Pressurizer Gp-Cab
133-6052 Rops Gp
151-6472 Screen Gp-Cab
133-8266 Screen Gp-Protection
156-1148 Seat Belt Gp -Retractable
8y-3792 Seat Belt Gp -Retractable
134-6688 Seat Gp -Cloth
133-9263 Seat Gp -Cloth
133-9262 Seat Gp -Vinyl
134-6639 Seat Gp -Vinyl, Lumbar
134-6520 Seat Gp-Suspension -Vinyl, Lumbar
134-6521 Seat Gp-Suspension -Cloth
108-4082 Suspension Gp-Seat -Contour
3w-6876 Washer Gp-Window
8g-4537 Washer Gp-Window
3w-4229 Window As -Lh
3w-4228 Window As -Rh
9g-4598 Window As-Sliding -Lh
9g-4597 Window As-Sliding -Rh
8y-6442 Window Gp-Cab -Sliding, Lh
10***44Motor Group-Window Wiper; (24-Volt)(24-Volt)1
3C***84Screw-Machine; (M5x0.8 Bg Thd)4
3T***59Bracket1
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8y-6437 Window Gp-Cab -Sliding
08***11Screw-Pan Head; (M5x0.8x16-mm)(M5x0.8x16mm)2
6V***12Screw-Machine; (M6x1x25-mm)2
8T***77Screw-Machine; (M5x0.8x12mm)2
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8e-4935 Window Gp-Cab -Sliding, Lh
08***11Screw-Pan Head; (M5x0.8x16-mm)(M5x0.8x16mm)2
6V***12Screw-Machine; (M6x1x25-mm)2
8E***35Window Group-Cab; -Sliding, Lh1
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8e-4934 Window Gp-Cab -Sliding, Rh
3t-7071 Wiper Gp-Window -Door, Rh
10***44Motor Group-Window Wiper; (24-Volt)(24-Volt)1
20***23Cap; (Wiper)1
3C***84Screw-Machine; (M5x0.8 Bg Thd)4
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9x-3337 Wiper Gp-Window -Rear
6A***18Washer; (8.1x12.5x1-mm Thk)1
6V***07Shaft As; (Pivot)1
6V***09Cap-Wiper1
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3t-7072 Wiper Gp-Window -Door, Lh
1V***56Nut1
1V***57Cap1
1V***58Driver1
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6t-7293 Wiper Gp-Window -Door, Lh
01***16Setscrew; (8-32x0.5-In)1
03***15Bolt 5t***53 Cable As To 5t***18 Lever12
2H***20Lockwasher (11.38mm Id)1
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8e-8707 Wiper Gp-Window
01***16Setscrew; (8-32x0.5-In)1
03***15Bolt 5t***53 Cable As To 5t***18 Lever12
10***42Wiper Pivot Group; (Front Window)4
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101-0742 Wiper Pivot Gp
10***42Wiper Pivot Group; (Front Window)1
1U***80Bracket1
4T***72Trunnion1
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Power Train
8p-3046 Control Gp-Transmission Hyd
0S***87Bolt-Bracket Assembly To Timing Gear9
10***04Hub-Ring Gear1
14***59Hub1
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145-7760 Drive Gp-Final
11***98Gauge-Oil Level (Dipstick)1
14***60Drive Group-Final1
15***03Tube As1
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152-5704 Filler Gp-Power Train Oil
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold2
0S***95Bolt 1.25 In. (31.75 mm) Long Guard Assemblies To Radiator Guard6
13***75Filter Element As-Oil; (Ultra High Efficiency)(Cleanout/High Efficiency)1
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8g-4388 Filter Gp-Oil -Transmission
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold4
0S***09Bolt (3/4") Filler Tube Assembly To Transfer Drive Case1
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine18
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145-7374 Gear Gp-Bevel & Transfer
03***67Connector-Flared -- Adapter To Hose As.1
03***68Elbow (For Use With Shallow Pan)1
0S***09Bolt (3/4") Filler Tube Assembly To Transfer Drive Case1
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166-3447 Lines Gp-Power Train Cooler
03***83Nipple-Front Axle Suction Port1
03***79Elbow1
14***92Hose As1
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8g-2448 Lines Gp-Power Train Oil
3T***15Gasket (Small)1
3T***15Spacer; (13.5x19.05x29-mm Thk)2
3T***16Bracket1
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3t-9633 Mounting Gp-Transmission
03***60Ring-Retaining1
10***18Gear-Sun; (33-Teeth)1
10***19Gear-Sun; (33-Teeth)1
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132-9210 Planetary Gp-Transmission
13***10Planetary Group-Transmission1
14***75Transmission Ar1
14***60Drive Group-Final2
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138-2324 Power Train Ar
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly2
0T***55Bolt; (3/8-16x4.25-In)(Location S)4
13***24Power Train Ar1
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3t-7898 Pump Gp-Gear
10***22Segment3
10***24Segment2
2S***58Washer-Hard; (17x29x3-mm Thk)(Engine Brake)23
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3t-7897 Pump Gp-Gear
0S***87Bolt-Bracket Assembly To Timing Gear2
1H***27Seal 10.1 cm(3.984 In.) I.D.1
3T***97Pump Group-Gear2
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3t-9049 Segment Gp-Sprocket
0L***78Bolt 44.45 mm(1.75 In.) Long8
1A***58Plug (2.38" Diameter)1
3T***49Segment Group-Sprocket; Sprocket Segment Group1
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8e-8919 Shaft Gp-Drive
8E***19Shaft Group-Drive1
8G***47Shaft-Governor Control1
8G***48Shaft-Governor Control1
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8g-1929 Shaft Gp-Steering Clutch Input
0S***84Bolt, Hex. Hd., 1/2"-20 N.C. X 1 3/4"1
0S***18Bolt; (5/16-18x1-In)(Hydraulic Pump)24
0T***02Bolt; (3/8-16x0.625-In)(Shield To Head)6
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8e-7859 Torque Converter Gp
13***10Planetary Group-Transmission1
14***74Gear Group-Bevel & Transfer1
8E***59Torque Converter Group1
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1t-2026 Torque Converter Gp
0S***84Cap Screw (2 1/4" Long)1
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine2
0S***91Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***828
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145-7375 Transmission Ar
0L***78Bolt 44.45 mm(1.75 In.) Long8
14***75Transmission Ar1
3V***31Washer; (10.2x16x2-mm Thk)(16mm Od)8
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8e-8928 Universal Joint Gp
06***40Seal-O-Ring (Id=37.69mm)1
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly4
14***46Plug-Pipe1
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8p-3045 Valve Gp-Transmission Control
0S***88Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter1
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly2
1F***35Spacer; (0.63x0.84x1.47-mm Thk)1
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2p-3675 Valve Gp-Relief -Torque Converter Outlet
2P***75Valve Group-Relief; Valve Gp-Pressure Relief1
4B***03Bolt (4 In. Long)--101.6 mm)26
5M***14Pipe Plug Cylinder Block Oil Pressure4
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Service Equipment And Supplies
153-4904 Film Gp
15***04Film Group1
29***90Film-Stripe; (Cat 517, Rh)1
29***91Film-Stripe; (Cat 517, Lh)1
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292-4493 Film Gp
11***31Film; (Identification) (On Fuse Box Near Diagnostick Connector)1
14***27Film-Instruction; (Fuel Shutoff)2
15***04Film Group1
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152-2122 Plate & Film Gp
15***22Plate & Film Group1
5P***97Plate-Warning (Universal); In Operators Compartment On Left Front Panel Near Top1
6V***06Film-Face; (Control Group)1
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151-5627 Plate & Film Gp
15***27Plate & Film Group1
3E***27Plate-Service Information; (Machine)1
5P***97Plate-Warning (Universal); In Operators Compartment On Left Front Panel Near Top1
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152-2123 Plate & Film Gp
15***23Plate & Film Group1
4W***86Protection Group-Vandalism1
5P***00Key Total 2 Pieces Per Unit; (Literature Compartment)1
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134-9652 Protection Ar-Vandalism
13***52Protection Ar-Vandalism1
5P***00Key Total 2 Pieces Per Unit; (Literature Compartment)1
5P***02Padlock Group; (Includes: Battery Compartments, Platform Compartments, Radiator Access Door, Firewall Doors)2
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160-5866 Protection Ar-Vandalism
0S***71Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting2
16***66Protection Ar-Vandalism1
16***39Tube As1
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162-8833 Protection Gp-Vandalism
Steering And Braking System
9n-4823 Clutch & Brake Gp-Steering
1A***52Clevis,Rod End Governor And Decelerator Control2
1B***06Key-Woodruff2
1J***84Pin,Straight,Headed2
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3w-2907 Control Gp-Service Brake
0S***18Bolt; (5/16-18x1-In)(Hydraulic Pump)2
1J***97Valve; (Push-Pull)1
1S***38Ring-Retaining2
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3t-6498 Valve Gp-Steering & Brake Cont
10***29Piston Assem.1
10***31Washer1
10***34Spacer1
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Undercarriage
9n-4885 Bar Gp-Equalizer
14***54Block-Track Idler1
14***56Cap As-Track Idler1
6B***63Pin-Spring (.25in Od)1
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149-1057 Cap Gp-Track Idler
10***44Guard As; (Rh Outer/Lh Inner)2
10***45Guard As; (Rh Inner/Lh Outer)2
10***73Block1
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147-6890 Frame Gp-Telescoping Recoil
10***44Guard As; (Rh Outer/Lh Inner)2
10***45Guard As; (Rh Inner/Lh Outer)2
10***73Block1
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150-1985 Frame Gp-Telescoping Recoil
10***44Guard As; (Rh Outer/Lh Inner)2
10***45Guard As; (Rh Inner/Lh Outer)2
10***73Block1
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152-8140 Guard Gp-Track
12***03Bar4
13***93Plate4
15***24Guard4
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138-7530 Guard Gp-Track -Rear
12***03Bar4
13***93Plate4
13***30Guard Group-Track; -Rear1
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146-1698 Guard Gp-Track Roller
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly24
10***91Washer-Thrust2
14***98Guard Group-Track Roller1
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8e-4007 Idler Gp-Front
10***18Track Bushing; Bushing-Track42
10***25Track Link; (R.H.)41
10***26Track Link; (L.H.)41
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148-2465 Link As-Track
14***65Link As-Track1
1A***35Bolt 2.00 In. (5.08 cm) Long6
1D***28Bolt 8.26 cm(3.25 In.) Long22
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106-1638 Link As-Track
10***18Track Bushing; Bushing-Track44
10***25Track Link; (R.H.)43
10***26Track Link; (L.H.)43
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9n-4836 Pivot Bar Gp
12***28Rim As-Double Flange1
12***34Bushing Assem.2
12***57Ring-Retaining2
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149-1051 Roller Gp-Track-Double Flange
14***51Roller Group-Track-Double Flange2
6V***69Bolt; (M20x2.5x80-mm)4
8T***82Washer; (Hard) (22x35x3.5mm Thk)4
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149-1053 Roller Gp-Track-Double Flange
12***25Rim As-Single Flange1
12***34Bushing Assem.2
12***57Ring-Retaining2
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149-1052 Roller Gp-Track-Single Flange
0S***71Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting2
14***52Roller Group-Track-Single Flange1
16***23Seal-U-Cup1
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149-1050 Roller Gp-Track-Single Flange
14***50Roller Group-Track-Single Flange2
6V***69Bolt; (M20x2.5x80-mm)4
8T***82Washer; (Hard) (22x35x3.5mm Thk)4
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202-1460 Track Adjuster & Recoil Gp
14***79Track Group; -Rh1
14***93Track Group; -Lh1
20***60Track Adjuster & Recoil Group1
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8e-7053 Track Adjuster & Recoil Gp
16***23Seal-U-Cup1
19***09Valve-Fill; (Grease)1
2J***74Seal-O-Ring; 9.12mm(.36in) Id1
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148-2477 Track Ar
14***77Track Ar1
14***96Track Group; -Rh1
14***98Track Group; -Lh1
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194-1551 Track Ar
10***10Pin-Track2
10***42Bolt-Track Master; (3/4-16x2.9-In)3
10***19Bolt-Track Master; (3/4-16x3.9-In)3
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152-8109 Track Ar
148-2495 Track Ar
14***95Track Ar1
15***07Track Group1
15***08Track Group1
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152-8106 Track Ar
15***06Track Ar1
15***10Track Group1
15***11Track Group1
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152-8111 Track Gp
10***10Pin-Track2
10***38Link As-Track1
10***42Bolt-Track Master; (3/4-16x2.9-In)3
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148-2479 Track Gp -Rh
10***10Pin-Track2
10***42Bolt-Track Master; (3/4-16x2.9-In)3
10***19Bolt-Track Master; (3/4-16x3.9-In)3
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148-2498 Track Gp -Lh
10***10Pin-Track2
10***42Bolt-Track Master; (3/4-16x2.9-In)3
10***19Bolt-Track Master; (3/4-16x3.9-In)3
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152-8104 Track Gp
10***38Link As-Track1
10***42Bolt-Track Master; (3/4-16x2.9-In)2
10***19Bolt-Track Master; (3/4-16x3.9-In)2
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152-8105 Track Gp
10***10Pin-Track2
10***38Link As-Track1
10***42Bolt-Track Master; (3/4-16x2.9-In)3
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152-8110 Track Gp
10***10Pin-Track2
10***38Link As-Track1
10***42Bolt-Track Master; (3/4-16x2.9-In)3
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152-8108 Track Gp
10***10Pin-Track2
10***38Link As-Track1
10***42Bolt-Track Master; (3/4-16x2.9-In)3
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152-8107 Track Gp
10***10Pin-Track2
10***38Link As-Track1
10***42Bolt-Track Master; (3/4-16x2.9-In)3
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148-2493 Track Gp -Lh
10***10Pin-Track2
10***42Bolt-Track Master; (3/4-16x2.9-In)3
10***19Bolt-Track Master; (3/4-16x3.9-In)3
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148-2496 Track Gp -Rh
10***10Pin-Track2
10***42Bolt-Track Master; (3/4-16x2.9-In)3
10***19Bolt-Track Master; (3/4-16x3.9-In)3
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151-4963 Undercarriage Ar
05***94Bolt-12 Point Head; (3/8-16x1.75-In)6
10***41Disc-Friction6
10***44Disc-Friction5
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138-2325 Undercarriage Ar
13***25Undercarriage Ar1
14***52Roller Group-Track-Single Flange8
14***53Roller Group-Track-Double Flange6
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Work Tools
3g-9308 Edge Gp-Bit & Cutting
15***14Cover; (Install On Rh Console)1
3G***08Bit & Cutting Edge Group1
6J***88Capscrew, Button Head (3/8 Nc X 7/8)4
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9u-8855 Blade As-Angling
3G***17Pin1
3G***08Bit & Cutting Edge Group1
4T***31Retainer1
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6y-6089 Blade Gp-Angling
2J***06Nut Front Support To Frame; Nut-Front Support To Frame20
3G***06Edge-Cutting2
5J***73Bolt 2.06cm(.8125in.)Long20
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162-5733 Winch Gp
13***62Film-Stripe2
13***63Film-Stripe; (145.1 cm Each)4
15***95Film-Stripe2
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517 serial number reference

The PIN/serial plate on a 517 is a riveted metal tag on the machine frame, separate from the engine serial tag (engine serial and machine PIN differ, so read the frame-mounted plate, not an engine tag). The first three characters are the prefix, identifying the model and production block (5WW vs 6PW for the 517); the following digits are the sequential unit number within that block, so a plate reading 5WW00203 would be an early unit in the 5WW block. Exact plate placement on the 517 frame is not independently confirmed here; if it is not visible near the usual frame-rail/engine-access area, consult dealer literature for the exact spot.

PrefixIdentifies
5WW517 Track Skidder, earlier production run
6PW517 Track Skidder, later/final production run

Frequently asked questions

What engine powers the Cat 517?

Every Cat 517, from early 5WW-prefix serial numbers through the last 6PW-prefix machines, uses the Cat 3304 DIT direct-injection turbocharged diesel. Caterpillar never swapped engines on this model; the 3304 DIT ran unchanged across the full production span.

What is the operating weight of the Cat 517?

Operating weight runs about 18,364 kg (40,450 lb), varying a bit with grapple, blade, or cable/winch fit. Cable and swing-boom configurations for steep terrain can shift that figure slightly from the standard grapple setup.

What replaced the Cat 517?

Nothing directly. Caterpillar ended the 517 (and its 527 sibling) around 2010 because the compact engine bay could not fit a Tier-compliant replacement engine, and low sales volume did not justify a redesign. Caterpillar exited the track-type skidder market rather than launch a direct successor; buyers needing a new track skidder today look to other manufacturers.

What 517 owners discuss

What engine does the Cat 517 track skidder run, and does it change across the production run?
Every 517 built used the Cat 3304 DIT (direct-injection, turbocharged) four-cylinder diesel, with no engine change across the run. The D4H/D5H-derived chassis left no room in the engine bay for a larger or electronically controlled block, and that constraint is also why production of the 517 (and 527) ended around 2010 - the 3304 could not be reworked to meet the next emissions tier and there was nowhere to fit a compliant replacement engine. Net flywheel output is commonly cited near 89-90 kW (120-121 hp) with gross output near 100 kW (134-136 hp); treat exact numbers as varying by configuration/series listing. Expect the same fuel-system wear pattern on any serial range: aging injection pumps and injectors bring hard starting, rough idle, uneven cylinder firing and smoke once the fuel system has seen water, dirt, or long sitting idle.
What transmission behavior comes up again and again on these machines?
A recurring pattern: hesitation shifting 1st to 2nd, sometimes under load, progressing to the machine refusing to shift into forward or reverse at all. Owners and techs trace this to wear or debris in the main control valve, and to a safety valve that sticks and parks the transmission in neutral. On higher-hour units (discussion points to roughly 10,000+ hours) a worn charging pump can no longer fill the clutches fast enough, producing the same symptom. Metal in an oil sample combined with any shift hesitation points to the valve or pump rather than a simple filter change. Because a transmission that hangs up can strand a loaded machine on a grade, have your dealer verify control-valve and safety-valve condition with a pressure test before the machine goes back to woods work.
Is there a known structural weak point on the 517's frame or pivot bar?
Yes. Pivot-bar and equalizer-bar breakage is a recognized pattern on these tractors, and on at least one reported machine a broken pivot let the final drive drop onto the track frame and bend the sprocket-mount housing. A high-hour 517 (reported around 5,000 hours) had gone through several pivot bars, an equalizer bar, and a cracked main-frame joint under the cab near the blade-lift cylinder mount. Field workarounds include adding a grease fitting at the pivot oil hole and machining extra shoulder onto the pivot shaft so the inner ring has something to seat against on reassembly. Because a pivot or frame failure can drop a loaded blade or track-frame component, have your dealer verify pivot bar, equalizer bar, and frame-joint condition (visual plus magnetic-particle inspection) on any machine with heavy hour history.
What about the boom or king post on swing-boom and grapple-equipped 517s?
The king post that the boom cylinder pins into is a documented weak spot, especially on swing-boom grapple setups - operators describe snapping the ears off the original king-post design under repeated cycling. The common field fix is rebuilding the post with a yoke-and-pin joint (a female yoke on the cylinder end, male pin with more surrounding material) instead of the original ear design. Because a failed king post can drop a loaded grapple or boom, have your dealer verify boom-pin and king-post condition, and confirm any previously repaired unit uses a properly engineered yoke joint rather than a re-welded ear.
Owners mention gauges going dead or reading erratically - is that a known issue?
Yes, and the reported pattern is consistent across these older mechanical-gauge machines: needles twitch at key-on, then drop to zero and stay there through operation. Troubleshooting traces the fault to the wiring run between the gauge cluster and the sending units rather than to the gauges or senders themselves - corroded connectors, chafed harness sections, or a bad ground are the usual culprits. Because dead gauges can mask a real oil-pressure or coolant-temperature problem, have your dealer verify actual oil pressure and coolant temperature with test gauges before trusting the dash again after any gauge or wiring repair.
What undercarriage wear pattern is typical for this machine?
The 517 carries D5H-sized heavy-duty track built for extended wear life, with an extended roller frame that puts more track under the grapple/winch for balance. In woods duty, the recurring complaint is mud, bark, and debris packing in around the final drive - if it isn't cleaned out regularly, it packs tight enough to push the final-drive face seal out of position and start a leak. Track tension also matters: running tracks tight to fight debris buildup accelerates sprocket-tooth wear. Machines still running the older dry (non-sealed-and-lubricated) track style are reported to rust and run noticeably noisier than sealed-and-lubricated track; expect condition to vary a lot by how the prior owner cleaned and tensioned the undercarriage.
What should a buyer check before purchasing a used 517?
Beyond the usual walk-around, pull the transmission and final-drive filters and look for shiny metal in the element, then run a magnet over it - iron versus non-magnetic material tells you whether you're seeing steel wear or bushing/bearing wear. Cycle every shift range under light load and watch for the hesitation pattern owners describe. Inspect the pivot bars, equalizer bar, and the frame joint under the cab for cracks or prior weld repairs, and check the king post/boom pin area on grapple machines for elongation or repair welds. On tracks, confirm sealed-and-lubricated style versus older dry track, and check that the machine rolls freely on a slight incline (it may not roll on flat ground with tight track, which is normal). Given the pivot-bar, king-post, and transmission-valve issues documented on this model, have your dealer verify all of these structural and control-valve points, plus run a hydraulic-pump flow test, before committing to a high-hour unit.

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

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