Caterpillarwheel dozer
Caterpillar 844
Maintenance schedule, common problems & OEM parts breakdown
The Cat 844 is Caterpillar's large-class wheel dozer, built for high-production dozing, ripping, and load-and-carry work in mining, quarry, and heavy civil jobs where a crawler dozer's mobility can't keep pace. Earlier production machines ran the Cat 3412E V12 diesel, rated around 620-625 hp (463-466 kW) net flywheel power (about 675 hp / 503 kW gross), at an operating weight near 70,800 kg (156,100 lb). Caterpillar re-engined the line onto the Cat C27 ACERT V12 for the 844H and 844K generations, lifting output into a 687-752 hp gross range (roughly 699-732 hp net depending on emissions tier and rating standard) and pushing operating weight up to about 74,900 kg (165,100 lb) on the heavier 844K build. Cat has since dropped the letter suffix and currently sells the model simply as the 844, carrying the C27 ACERT forward. Every generation shares the same basic layout: a hydraulically steered hitch, rear-mounted engine and torque-converter powershift transmission, and a front semi-U or straight dozer blade (roughly 15.8-16.1 cubic meters / 20.7-21.1 cubic yards standard capacity) with power-angle-tilt control. Cat offers the 844 in multiple blade and tire configurations to suit mine backfill, coal, quarry face, and general earthmoving duty cycles.
Across generations the 844 picked up ACERT-era engine electronics, tighter fuel management, and Tier 3 or Tier 4-equivalent emissions compliance, plus a rimpull control system that automatically manages torque converter lockup and modulates pedal-commanded rimpull to cut tire slip and wear. The 844K and current 844 added load-sensing hydraulic steering, tire pressure monitoring, and upgraded case-drain filtration over the H-series, alongside the jump in both power and operating weight. In the used and parts market the model matters because it is the volume workhorse of Cat's big wheel-dozer range, sitting between the 834 and 854 in size, with enough population across mining and quarry fleets to keep both the 3412E-powered and C27-powered generations in active service. That keeps steady demand for tires, blade wear components, torque converter and final drive parts, and engine top-end parts well after new-machine sales moved on to the current C27 generation.
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 844 specifications
Identity / Generations
| Model lineage | Two distinct 844 generations exist. Original 844 wheel dozer ran the Cat 3412E engine (net 620 hp / 462 kW, operating weight approx 156,120 lb / 70,815 kg). It was superseded by the C27 ACERT-powered 844H, then 844K. Current Cat dealer catalogs now market the newest C27 ACERT machine simply as "844" again (K suffix dropped), matching the 844K spec sheet exactly (gross 752 hp / 561 kW, operating weight 165,089 lb / 74,883 kg). Treat these as two separate spec sets below: Legacy 844 (3412E) and Current 844 (C27 ACERT, ex-844K). |
Engine
| Legacy 844 - engine model | Cat 3412E, V-12, direct injection |
| Legacy 844 - net power | 462 kW (620 hp) @ 2000 rpm |
| Legacy 844 - displacement | 27.0 L (1,647.7 cu in) |
| Legacy 844 - bore x stroke | 137 mm x 152 mm (5.4 in x 6.0 in) |
| Legacy 844 - emissions | Not documented for this generation in reviewed spec sheets; predates current EPA Tier framework as commonly cataloged |
| Current 844 (C27 ACERT, ex-844K) - engine model | Cat C27 ACERT, V-12, direct injection |
| Current 844 - gross power (ISO 14396) | 561 kW (752 hp) @ 1800 rpm |
| Current 844 - gross power (SAE J1995) | 571 kW (766 hp) |
| Current 844 - net power (SAE J1349, standard ambient) | 521 kW (699 hp) |
| Current 844 - net power (SAE J1349, high ambient) | 483 kW (648 hp) |
| Current 844 - displacement | 27.03 L (1,649.5 cu in) |
| Current 844 - bore x stroke | 137.2 mm x 152.4 mm (5.4 in x 6.0 in) |
| Current 844 - peak torque | 3,557 N*m (2,624 lb-ft), 18% torque rise |
| Current 844 - emissions | U.S. EPA Tier 4 Final, or Tier 2 equivalent for non-regulated regions |
Weights
| Legacy 844 - operating weight | 70,815 kg (156,120 lb); one aggregator lists 70,362 kg (155,117 lb) - treat 156,120 lb as the better-supported figure |
| Current 844 (ex-844K) - operating weight | 74,883 kg (165,089 lb) |
| Configuration note | Neither generation publishes separate Std/XL/LGP operating-weight variants; wheel dozers are typically offered with a single base machine plus optional blade types (see Blades group), which change weight only modestly and are not broken out in factory literature |
Dimensions
| Legacy 844 - length with blade on ground | 10.94-11.0 m (35.9-36 ft) |
| Legacy 844 - width over tires | 4.37-4.39 m (14.3-14.4 ft) |
| Legacy 844 - height to cab top | 5.03-5.03 m (16.5-17 ft) |
| Legacy 844 - wheelbase | 4.60 m (15.1 ft) |
| Legacy 844 - ground clearance | 0.43-0.61 m (1.42-2.0 ft), sources vary |
| Legacy 844 - minimum turning radius | 9.91 m (390 in) |
| Legacy 844 - total steering angle | 35 degrees |
| Current 844 - length with blade on ground | 11.12 m (36.5 ft) |
| Current 844 - wheelbase | 4.60 m (15.1 ft) |
| Current 844 - ground clearance | 0.596 m (2.0 ft) |
| Current 844 - height to top of ROPS | 5.24 m (17.2 ft) |
| Current 844 - height to top of hood | 3.86 m (12.7 ft) |
| Current 844 - height to top of exhaust pipe | 5.05 m (16.6 ft) |
| Current 844 - minimum turning radius (over blade) | 10.37 m (34 ft) |
| Current 844 - centerline front axle to hitch | 2.30 m (7.5 ft) |
| Current 844 - centerline rear axle to bumper | 3.80 m (12.5 ft) |
| Current 844 - total steering angle | 35 degrees |
| Current 844 - rear axle oscillation | 8.5 degrees, trunnion-mounted; front axle fixed |
| Tire size (both generations, per published Cat literature) | 45/65-R39, radial |
Performance
| Legacy 844 - max forward speed | 21 km/h (13.1 mph) |
| Legacy 844 - max reverse speed | 23 km/h (14.3 mph) |
| Legacy 844 - transmission | Cat Planetary Power Shift, 3 forward / 3 reverse gears |
| Current 844 - transmission | Cat Planetary Power Shift, 3 forward / 3 reverse gears, torque-converter drive plus lock-up direct drive |
| Current 844 - converter drive, forward gears | 1st 7.3 km/h (4.5 mph), 2nd 13.3 km/h (8.3 mph), 3rd 22.9 km/h (14.2 mph) |
| Current 844 - converter drive, reverse gears | 1st 7.9 km/h (4.9 mph), 2nd 14.7 km/h (9.1 mph), 3rd 24.9 km/h (15.5 mph) |
| Current 844 - direct (lock-up) drive, forward gears | 1st lock-up disabled, 2nd 13.7 km/h (8.5 mph), 3rd 24.5 km/h (15.2 mph) |
| Current 844 - direct (lock-up) drive, reverse gears | 1st 8.7 km/h (5.4 mph), 2nd 15.4 km/h (9.6 mph), 3rd 26.4 km/h (16.4 mph) |
| Drawbar pull (both generations) | Not published in factory spec sheets for this wheel dozer; confirm with dealer if load-matching is required |
| Ground pressure (both generations) | Not published; ground pressure is a track-machine metric and is not a standard catalog spec for wheeled dozers |
| Gradeability (both generations) | Not published in factory spec sheets reviewed; confirm with dealer |
| Steering hydraulic max flow - current 844 | 357 L/min (94.3 gal/min), pilot load-sensing, variable-displacement piston pump, relief setting 31,000 kPa (4,500 psi) |
| Implement hydraulic output - current 844 | 311 L/min (82 gal/min) at 2,000 rpm and 6,900 kPa (1,000 psi) |
| Implement relief valve settings - current 844 | Bulldozer circuit 18,650 kPa (2,700 psi); tilt cylinders 20,150 kPa (2,920 psi) |
| Brakes - current 844 | Full hydraulic, enclosed, oil-disc, meets ISO 3540:2011 |
| Sound level - current 844 | Standard machine 115 dB(A), suppressed machine 113 dB(A), operator station 69 dB(A) per ISO 6395/6396 |
Blades
| Legacy 844 - standard blade capacity | 15.9 m3 (20.8 yd3) |
| Legacy 844 - blade width | 5.43 m (17.8 ft) |
| Legacy 844 - blade height | 1.83-1.86 m (6.0-6.1 ft) |
| Current 844 - overall blade capacity range across all offered blades | 15.9-30.7 m3 (20.7-40.2 yd3) |
| Current 844 - Semi-U (SU) blade capacity | 17.8 m3 (23.3 yd3) |
| Current 844 - HD Semi-U blade capacity | 16.1 m3 (21.1 yd3) |
| Current 844 - Coal blade capacity | 30.7 m3 (40.2 yd3) |
| Blade option note | Reviewed sources do not break out A-blade or VPAT capacities specifically for the 844/844K; only straight/base, Semi-U, HD Semi-U and Coal variants are documented |
Service capacities summary
| Legacy 844 - fuel tank | 803-984 L (212-260 gal), varies by source/configuration |
| Legacy 844 - hydraulic tank | 534 L (141 gal) |
| Legacy 844 - cooling system | 190 L (50.2 gal) |
| Legacy 844 - steering hydraulic output | 409 L/min (108 gal/min), single-source figure, not cross-verified |
| Legacy 844 - engine oil (crankcase) | Not documented in reviewed sources |
| Current 844 - fuel tank (standard) | 1,085 L (286.6 gal) |
| Current 844 - cooling system | 208 L (54.9 gal) |
| Current 844 - engine oil (crankcase) | 76 L (20 gal) |
| Current 844 - transmission | 110 L (29.1 gal) |
| Current 844 - front differential/final drives | 271 L (71.6 gal) |
| Current 844 - rear differential/final drives | 261 L (68.9 gal) |
| Current 844 - hydraulic system, implement/fan circuit | 261 L (68.9 gal) |
| Current 844 - hydraulic system, steering/braking circuit | 132 L (34.9 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
844 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 76 L (20 gal) on the current Cat C27 generation (Tier 4 Final/Stage V and Tier 2-equivalent option). The earlier 3412E-powered generation of the 844 held about 95 L (25 gal). | Cat DEO-ULS (API CJ-4) multigrade; SAE 15W-40 is the preferred grade. SAE 10W-30 and SAE 5W-40 (Cat DEO-ULS SYN) cover a wider ambient swing, and SAE 0W-40 (Cat DEO Cold Weather) is used below about -18°C (0°F). Tier 4 Final engines with aftertreatment require Cat DEO-ULS or an oil meeting the Cat ECF-3 / API CJ-4 specification. |
| Cooling system | 208 L (54.9 gal) on the current C27 generation. The earlier 3412E-powered generation held about 190 L (50.2 gal). | Cat Extended Life Coolant (ELC) or Cat Diesel Engine Antifreeze/Coolant (DEAC), ethylene glycol-water premix, factory fill. A -50°C (-58°F) rated antifreeze is offered for cold-climate work, with coolant heating elements recommended between -18°C and -30°C (0°F to -22°F). Standard-ambient cooling package is rated to 43°C (110°F) site temperature; a high-ambient package extends that to 49°C (121°F). |
| Fuel tank | 1085 L (286.6 gal) standard, current C27 generation. The earlier 3412E-powered generation carried about 984 L (260 gal). | ULSD (ultra-low sulfur diesel, 15 ppm sulfur or less) is required for the Tier 4 Final engine option, accepting blends up to 20% biodiesel (FAME) or up to 100% renewable diesel (HVO/GTL). The Tier 2-equivalent engine option tolerates higher biodiesel blends, up to 100% FAME. A fuel heater (engine-heat recirculation) is recommended between -18°C and -30°C (0°F to -22°F). |
| Powershift transmission | 110 L (29.1 gal). Essentially unchanged across the 3412E and C27 generations (about 29-29.1 gal both ways). | Cat TDTO (Transmission/Drive Train Oil); SAE 30 is the typical factory-fill grade. SAE 10W is used below about 0°C (32°F), SAE 50 above about 10°C (50°F) for continuous hot-climate duty, and Cat TDTO-TMS multigrade covers a broad ambient swing (roughly -15°C to 43°C / 5°F to 110°F). Cat TDTO Cold Weather (SAE 0W-20) is used below about -20°C (-4°F). Cat SATO is listed as an approved alternative for this class of powershift transmission. |
| Final drive & differential - front axle | 271 L (71.6 gal). Matches across both the 3412E and current C27 generations. | Cat TDTO family, same viscosity ladder as the transmission: SAE 10W below 0°C (32°F), SAE 30 for a moderate range (about -20°C to 20°C / -4°F to 68°F), SAE 50 as the dealer service-fill choice for standard-configuration machines in continuous hot duty (about -10°C to 43°C / 14°F to 110°F), and Cat TDTO-TMS multigrade for wide ambient swings. Wheel-end axles with wet-disc brakes need Caterpillar's special axle oil additive package added to the final drive oil; confirm with the dealer whether the specific axle configuration requires it. |
| Final drive & differential - rear axle | 261 L (68.9 gal). Matches across both the 3412E and current C27 generations. | Same Cat TDTO family and viscosity-by-climate guidance as the front axle; same wet-disc brake additive consideration applies. |
| Hydraulic system - implement (lift/tilt) and cooling fan circuit | 261 L (68.9 gal), current generation. | Cat HYDO Advanced (grades 10, 20, or 30 by ambient) or Cat TDTO are the preferred fluids; Cat Bio HYDO Advanced is offered as an EU Ecolabel-approved biodegradable alternative. SAE 10W covers roughly -20°C to 40°C (-4°F to 104°F), SAE 20W about -5°C to 45°C (23°F to 113°F), and SAE 30 about 0°C to 50°C (32°F to 122°F). A -40°C (-40°F) arctic hydraulic oil package is available for extreme cold. |
| Hydraulic system - steering and braking circuit | 132 L (34.9 gal), current generation. | Same Cat HYDO Advanced / Cat TDTO recommendation and viscosity-by-climate guidance as the implement hydraulic circuit. |
| Chassis/pivot grease points (hitch, steering/articulation joint, axle trunnion bearings) | No oil-fill volume specified; these points are greased, not oil-filled. The 844 offers an automatic lubrication system as standard equipment that services the hitch, steering joint, and axle trunnion bearings; other pins and linkage points take manual grease fittings. | Cat Extreme Application Grease, NLGI 2, is the general-purpose chassis grease, pumpable down to about -7°C (20°F). For cold climates, Cat Extreme Application Grease-Arctic, NLGI 0, is recommended, pumpable down to about -43°C (-45°F). Cat Utility Grease, NLGI 2, is listed as a lighter-duty alternative, pumpable down to about -23°C (-10°F). |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 844 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 6,000 h |
|
Servicing the 844 beyond the schedule
Predictive Maintenance & Fluid Analysis
Run S.O.S sampling on 3412E or C27 engine oil, ICTC torque converter/transmission oil, differential and final drive oil, and hydraulic tank oil at every filter change to catch bearing wear, coolant intrusion, or clutch-pack wear before failure. Track extended life coolant condition to protect the C27's liners and oil coolers, and the 3412E's wet-liner cooling passages. Watch rimpull control system fault history and torque converter lockup slip data - early drift often flags a failing clutch pack or contaminated hydraulic oil long before a breakdown.
Corrective & Common Repairs
Common 844 repairs center on blade push-arms, lift/tilt cylinder pins and bushings, and pin retention hardware worn by constant dozing loads, plus rear-axle final drive seals and rimpull-stressed tires needing early replacement on rock or mine-face duty. On 3412E-powered units, injector and turbocharger work is the recurring engine fix; C27 ACERT machines more often need turbocharger, fuel injector, or engine sensor and harness attention instead. Hydraulic steering cylinder seal leaks at the hitch are a frequent field repair on high-hour machines.
Overhaul & Rebuild Points
Major rebuild points on the 844 line are the ICTC torque converter and powershift transmission clutch packs, the planetary final drives at the rear axle, and the C27 or 3412E engine's turbocharger, cylinder liners, and injectors at top-end overhaul. Blade trunnions, push-arm bushings, and lift/tilt cylinder bores wear from constant ground engagement and are common rebuild candidates alongside the hydraulic steering cylinders. Base rebuild timing on S.O.S trend data and measured wear rather than a fixed hour number.
Seasonal & Environment Servicing
In cold climates, verify extended life coolant protection level and engine oil viscosity grade for the 3412E or C27 before winter, and check block heater and battery condition given the machine's heavy cranking load. In hot, dusty mine or quarry settings, shorten air filter and radiator core cleaning intervals, inspect the cooling package fins for packing, and step up tire pressure and wear checks since heat and rimpull stress accelerate tread wear. Wet-season sites call for closer final drive seal and breather inspection to keep water out of the axle housings.
844 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 1R-0749 | Filter-Fuel | Fuel system service | Check fitment → |
| 1R-0716 | Filter As-Engine Oil | Lubrication service | Check fitment → |
| 7C-5011 | Support-Oil Filter | Lubrication service | Check fitment → |
| 9S-8752 | Nut-Full | Scheduled service item | Check fitment → |
| 8T-6765 | Plug-Pipe | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
844 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| MID 036 - CID 0100 - FMI 01 | Engine oil pressure data valid but below normal operating range (low oil pressure) | Low engine oil level, worn oil pump, plugged oil filter or suction screen, or a stuck pressure regulating/bypass valve; less commonly a failing pressure sensor reading falsely low | Shut the engine down at once if the gauge confirms low pressure; check oil level and filter condition before restart; if oil and filter are good, check sensor wiring before returning to service |
| MID 036 - CID 0100 - FMI 03 | Engine oil pressure sensor circuit voltage above normal (open circuit) | Damaged sensor harness, corroded connector, or failed pressure sensor rather than an actual oil pressure problem | Inspect the sensor connector and wiring for damage or corrosion, verify sensor supply voltage, replace the sensor if wiring checks out good |
| MID 036 - CID 0110 - FMI 00 | Engine coolant temperature data valid but above normal range (overheating) | Low coolant level, a plugged radiator core, a fan drive or hydrostatic fan fault, or a stuck thermostat | Stop and idle down safely, check coolant level and radiator core condition, confirm the hydrostatic cooling fan is responding to temperature before returning to work |
| MID 036 - CID 0110 - FMI 03 | Engine coolant temperature sensor circuit voltage above normal (open circuit) | Sensor wiring or connector fault, or a failed coolant temperature sensor, not necessarily an actual overheat condition | Cross-check actual coolant temperature against the gauge, inspect sensor wiring and connector, replace the sensor if the circuit checks open |
| MID 036 - CID 0111 - FMI 01 | Engine coolant level data valid but below normal range (low coolant) | Coolant leak, low reservoir/radiator level, or a faulty coolant level sensor/float | Check the coolant sight gauge and radiator level, inspect hoses and the radiator core for leaks, refill and bleed the system before restart |
| MID 036 - CID 0190 - FMI 08 | Engine speed/timing sensor signal abnormal (bad frequency, pulse width, or period) | Damaged or misadjusted engine speed/timing sensor, wiring fault, or debris affecting the sensor air gap | Inspect the speed/timing sensor and connector, check sensor air gap against spec, replace the sensor if the signal remains erratic; engine may crank but not start or may run poorly with this fault active |
| MID 036 - CID 0167 - FMI 04 | Alternator/charging system voltage below normal | Worn alternator brushes, a slipping or broken drive belt, a failing voltage regulator, or poor battery/ground connections | Check the charging alert indicator on the gauge cluster, inspect belt tension and alternator output, clean and tighten battery terminals and ground straps |
| MID 036 - CID 0041 - FMI 03 | 8-volt sensor supply voltage above normal | A short or high-resistance fault on the shared sensor supply circuit that feeds several engine sensors at once, more often the wiring than a single sensor | Check the common sensor supply wiring and connectors first; if several unrelated sensor codes appear together, suspect this shared supply circuit rather than replacing multiple sensors |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
844 attachments & work tools
Blades
Current-generation 844 (C27-engine) offers three factory blade options: Semi-U at 17.8 m³ (23.3 yd³), HD Semi-U (heavier liner package for abrasive/rock service) at 16.1 m³ (21.1 yd³), and a high-capacity Coal U-blade at 30.7 m³ (40.2 yd³) - spec sheets cite an overall blade-capacity range of 15.9-30.7 m³ (20.7-40.2 yd³) across these options. The earlier 3412E-engine 844 generation carried a single blade rated 15.9 m³ (20.8 yd³) at 5.43 m (17.8 ft) width. No straight S blade, angle A blade, or VPAT is documented for this model - VPAT-style angling belongs to Cat's smaller track-type dozer lines, not this wheel-dozer class.
Rippers
No single-shank or multi-shank ripper attachment is documented as a factory option for the 844. Rear-mounted ripping is not part of this wheel-dozer's standard or optional attachment lineup; that function sits with Cat's track-type dozers instead. Verify with a dealer if rear ripping capability is required for a specific application.
Winches
No towing-winch option is listed in 844 spec literature. Winch packages on Cat's dozer range are associated with track-type tractors, not wheel dozers, and none of the reviewed 844 spec sheets or dealer pages list a winch as standard or optional equipment.
Drawbars/counterweights
A rear drawbar with pin is standard equipment on the 844, used for towing/recovery rather than pulling ripped material or scrapers. No separate factory counterweight package is documented; the box-section rear frame and rear axle/oscillation design provide the machine's working ballast and stability instead of a bolt-on counterweight.
Cab/ROPS guarding for forestry/waste
Cab is a sound-suppressed, pressurized ROPS/FOPS structure meeting ISO 3471:2008 and ISO 3449:2005 Level II falling-object protection, with rear-vision camera and backup alarm as safety standard fitments. No forestry-specific guarding package is documented for the 844 - this model is marketed for mining, utility, and general dozing duty, not forestry. General rock-guard, belly-pan, and screen protection for quarry/waste environments is available through the dealer network as optional protective equipment, not a named forestry kit.
Hydraulic arrangement
Front blade circuit uses an electronically controlled lift/tilt hydraulic system with selectable Standard, Fine, and Fast blade-speed settings and cylinder-position stops; lift/tilt pump flow is about 82 gal/min (310 L/min) at 2,000 engine rpm. Steering runs on a separate load-sensing, variable-displacement piston-pump circuit rated up to roughly 94.3 gal/min (357 L/min). There is no rear-tool hydraulic circuit documented, consistent with the absence of factory ripper or winch options on this model.
All 844 assemblies by section
Every catalogued assembly group for the Caterpillar 844. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
191-4617 Aftercooler Gp-Air
| 19***17 | Aftercooler Group-Air | 1 |
| 19***18 | Core As-Aftercooler | 1 |
| 19***10 | Bracket As | 2 |
331-9057 Conversion Gp-Air Inlet & Exh
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 2 |
| 19***06 | Lines Group-Air | 1 |
| 19***10 | Lines Group-Air | 1 |
196-3818 Dust Ejector Gp
| 19***18 | Dust Ejector Group | 1 |
| 1S***68 | Tube-Bypass | 2 |
| 5P***97 | Clamp Fumes Disposal | 8 |
194-7653 Extension Gp-Exhaust
| 19***55 | Pipe As-Exhaust | 2 |
| 19***53 | Extension Group-Exhaust | 1 |
| 5P***76 | Washer Guard To Support Assembly And Guard Assembly | 8 |
220-4295 Lines Gp-Air
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 3 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
196-3813 Lines Gp-Air
| 19***13 | Lines Group-Air | 1 |
| 19***14 | Tube As | 1 |
| 19***15 | Tube As | 1 |
191-7806 Lines Gp-Air
| 12***57 | Hose-Hump | 2 |
| 19***06 | Lines Group-Air | 1 |
| 19***08 | Tube | 1 |
192-9010 Lines Gp-Air
| 11***23 | Fitting | 2 |
| 12***59 | Tee | 1 |
| 13***91 | Hose-Hump | 2 |
166-5437 Manifold Gp-Exhaust
| 10***01 | Seal As-Exhaust | 8 |
| 10***93 | Stud-Taperlock; (3/8-16x2.36-In)(3/8-16x60 Thd) | 2 |
| 10***12 | Spacer; (11.13x19.05x53-mm Thk) | 24 |
193-8597 Muffler Gp
| 11***51 | Support As-Air Cleaner | 1 |
| 11***52 | Support As-Air Cleaner | 1 |
| 12***80 | Eye-Lifting | 1 |
201-0262 Turbocharger Gp
| 11***23 | Spacer; (11.13x19.05x19-mm Thk) | 2 |
| 19***46 | Turbocharger Group | 2 |
| 1S***95 | Gasket-Turbocharger To Manifold; Gasket Turbocharger To Manifold | 2 |
196-5946 Turbocharger Gp
| 13***75 | Clamp As; (Service Repair) | 1 |
| 14***04 | Housing (Turbine) | 1 |
| 19***47 | Cover; (Compressor) | 1 |
Basic Engine
185-7909 Camshaft Gp
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 10***74 | Gear-Camshaft Drive; (86-Teeth) | 1 |
| 18***09 | Camshaft Group | 1 |
189-0752 Cover Gp-Cylinder Block
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 14 |
| 18***52 | Cover Group-Cylinder Block | 1 |
4n-6876 Cover Gp-Flywheel Housing
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 3 |
| 4N***14 | Cover | 1 |
| 4N***76 | Cover Group-Flywheel Housing; Flywheel Housing Cover Group | 1 |
216-7715 Cover Gp-Front Housing
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 6 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 3 |
| 11***74 | Bracket-Compressor | 1 |
188-4645 Cover Gp-Oil Pan
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 10***39 | Plug-Drain; (Engine Oil Pan) | 1 |
189-0748 Cover Gp-Valve Mechanism
| 10***88 | Base-Valve Mechanism Cover | 6 |
| 11***84 | Cover-Valve Mechanism | 4 |
| 11***15 | Cover As-Valve | 2 |
213-3202 Crankshaft As
| 15***40 | Gear-Crankshaft; (99-Teeth) | 1 |
| 21***02 | Crankshaft As | 1 |
| 4N***84 | Dowel; (.75 Long) | 1 |
4n-0922 Crankshaft Gp
| 21***02 | Crankshaft As | 1 |
| 25***52 | Plate-Thrust; (Crankshaft) | 2 |
| 31***66 | Bearing-Main; (Standard) | 7 |
117-9512 Cylinder Block As
| 11***20 | Seal-O-Ring; (Mid-Liner) | 12 |
| 11***12 | Cylinder Block As | 1 |
| 14***17 | Seal-O-Ring; (140.20mm Id) | 12 |
109-9010 Cylinder Block Gp
| 10***23 | Insert-Liner Seat; (5.21-mm Thk)(5.21mm Thk) | 0 |
| 10***24 | . Cover, Insert-Liner Seat; (5.16-mm Thk)(0.5-mm Us) | 0 |
| 10***25 | Insert-Liner Seat; (5.26-mm Thk)(0.5-mm Os), . Cover | 0 |
143-0046 Cylinder Head As
| 14***46 | Cylinder Head As | 1 |
| 1W***83 | Insert-Valve Seat; (Exhaust)(Standard) | 12 |
| 3B***23 | Core Plug--Flywheel Housing Pinion Shaft Hole | 12 |
192-1322 Cylinder Head As
| 10***94 | Dowel | 2 |
| 14***46 | Cylinder Head As | 1 |
| 17***88 | Guide-Valve; (Standard) | 24 |
108-1552 Cylinder Head Gp
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 06***61 | Seal-O-Ring (Id=40.87mm) | 12 |
| 10***92 | Stud-Taperlock; (3/8-16x3.93in) | 24 |
108-1887 Cylinder Head Gp
| 10***87 | Cylinder Head Group | 1 |
| 12***21 | Valve-Exhaust | 12 |
| 12***22 | Valve-Inlet | 12 |
6n-2229 Damper Gp
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 12 |
| 16***30 | Damper As | 1 |
| 2D***74 | Bolt; (5/8-18x6.75-In) | 8 |
4p-3669 Flywheel Gp
| 1A***03 | Bolt 12.07 cm(4.75 In.) Long | 12 |
| 4D***04 | Washer,Flat Cover Mtg,Accessory Drive | 12 |
| 4N***14 | Gear; (113-Teeth)(Flywheel Starter) | 1 |
126-7282 Gear Gp-Front -Timing
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 1 |
| 10***13 | Plate-Retaining | 1 |
| 10***16 | Gear; (85-Teeth)(Oil Pump) | 1 |
4p-3582 Gear Gp-Rear
| 03***94 | Connector-Flared | 2 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
141-8917 Housing Gp-Flywheel
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 2 |
| 14***17 | Housing Group-Flywheel | 1 |
126-7280 Housing Gp-Front
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 2 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 3 |
| 12***80 | Housing Group-Front | 1 |
189-0749 Lifting Gp-Engine
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 2 |
| 10***40 | Sensor Group-Temperature; -Output Transfer Gear Oil | 1 |
| 10***56 | Plate; (Rh) | 1 |
126-2267 Lifting Gp-Engine
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
| 11***75 | Bracket-Lifting; (Right) | 1 |
| 11***15 | Bracket-Lifting; (Left) | 1 |
188-4639 Pan Gp-Oil -Engine
| 18***39 | Pan Group-Oil; -Engine | 1 |
| 18***40 | Pan-Oil | 1 |
| 2P***03 | Bolt-Washer Head; (3/8-16x1.25-In) | 4 |
192-8809 Piston & Rod Gp
| 13***61 | Ring-Piston; (Top)(Top) | 1 |
| 15***56 | Bolt-Special; (Oil Jet) | 1 |
| 16***78 | Rod As-Connecting | 1 |
129-5228 Plug Gp-Cylinder Block
| 12***28 | Plug Group-Cylinder Block | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 4 |
| 7W***34 | Plug-Pipe (3/8-18 Nptf Thd) | 4 |
122-9522 Plug Gp-Cylinder Head
| 12***22 | Plug Group-Cylinder Head | 1 |
| 4N***32 | Plug-Cup | 2 |
| 5P***63 | Plug-Cup | 2 |
107-1954 Rocker Arm Gp
| 10***54 | Rocker Arm Group | 1 |
| 10***03 | Screw; (3/8-24x1.67-In)(Intake) | 2 |
| 12***63 | Bracket-Shaft | 1 |
319-7401 Seal Gp-Crankshaft -Front
| 14***67 | Seal Group-Crankshaft; (Front) | 1 |
| 31***01 | Seal Group-Crankshaft; -Front | 1 |
319-0785 Seal Gp-Crankshaft -Rear
| 14***68 | Seal-Crankshaft; (Rear)(Flywheel Housing) | 1 |
| 31***85 | Seal Group-Crankshaft; -Rear | 1 |
102-8748 Support Gp-Engine
| 10***19 | Bracket | 1 |
| 10***48 | Support Group-Engine | 1 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 8 |
108-1874 Valve Mechanism Gp
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 12 |
| 10***89 | Bridge-Valve | 24 |
| 10***88 | Valve Lifter Assem | 24 |
Cooling System
331-9058 Conversion Gp-Cooling System
| 19***12 | Cooling Ar | 1 |
| 19***11 | Lines Group-Water | 1 |
| 19***16 | Lines Group-Water | 1 |
191-5212 Cooling Ar
| 10***04 | Warning Group-Backup | 1 |
| 19***98 | Cooler Group-Hydraulic Oil | 1 |
| 19***01 | Radiator Group | 1 |
4w-0419 Core Gp-Oil Cooler
| 4W***19 | Core Group-Oil Cooler; -Transmission | 1 |
| 5M***14 | Pipe Plug Cylinder Block Oil Pressure | 2 |
191-4603 Fan Gp-Suction
| 11***50 | Adapter | 1 |
| 12***26 | Spacer; (13x25x25-mm Thk) | 8 |
| 19***03 | Fan Group-Suction | 1 |
189-0750 Lines Gp-Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 5 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 6 |
194-1016 Lines Gp-Water
| 03***48 | Clip; (11.11mm .437in Id) | 8 |
| 06***37 | Union-Flared | 2 |
| 09***96 | Spacer; (12x20x23-mm Thk) | 1 |
191-7811 Lines Gp-Water
| 19***11 | Lines Group-Water | 1 |
| 19***13 | Tube | 1 |
| 19***14 | Tube | 1 |
137-1339 Pump Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 10***30 | Bearing As-Roller | 1 |
| 11***21 | Plug-Felt; (Water Pump Housing) | 1 |
4n-5837 Pump Gp-Water
| 10***49 | Adapter-Inlet | 1 |
| 11***79 | Seal-O-Ring | 1 |
| 11***80 | Seal-O-Ring | 1 |
191-4601 Radiator Gp
| 10***72 | Hose; (Radiator) | 13 |
| 11***86 | Retainer | 14 |
| 11***16 | Core As-Radiator | 14 |
193-1658 Shroud Gp-Radiator
| 19***54 | Plate As | 2 |
| 19***55 | Channel As | 1 |
| 19***56 | Angle As | 1 |
194-3826 Valve Gp-Radiator Drain
| 11***35 | Bracket As | 1 |
| 12***72 | Hose-Hydraulic; (129-In) | 1 |
| 14***70 | Elbow, 90°,-8 Orb Swiv. /-8 Orfs | 1 |
Electrical And Starting System
223-1548 Control & Mtg Gp-Engine Elek
| 11***69 | Spacer-Special; (8.2x25x89.7-mm Thk) | 4 |
| 15***71 | Control Group-Engine Electronic | 1 |
| 22***48 | Control & Mtg Group-Engine Elek | 1 |
156-7171 Control Gp-Engine Electronic
| 15***71 | Control Group-Engine Electronic | 1 |
| 15***72 | Control Group-Engine Electronic | 1 |
156-7172 Control Gp-Engine Electronic
| 12***74 | Screw-Pan Head; (8-32x9.52-mm) | 1 |
| 13***26 | Washer; (4.52x8.28x0.76-mm Thk) | 1 |
| 15***72 | Control Group-Engine Electronic | 1 |
331-9539 Conversion Gp-Electrical
| 10***05 | Kit-Receptacle; (6-Pin)(Display Monitor Harness) | 1 |
| 18***63 | Lighting Group-Flood; -Radiator Guard | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 2 |
153-2073 Lamp Gp-Flood
| 15***73 | Lamp Group-Flood; -Cab-Extended Bolster-Rear-Blade-Moldboard | 1 |
| 15***50 | Body As-Lamp | 1 |
| 15***52 | Bezel | 1 |
135-0426 Lamp Gp-Signal -Stop, Tail
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 13***26 | Lamp Group-Signal; (24-Volt, Stop, Tail)(Stop/Tail) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
183-3463 Lighting Gp-Flood -Radiator Guard
| 14***88 | Bracket As | 2 |
| 15***73 | Lamp Group-Flood; -Cab-Extended Bolster-Rear-Blade-Moldboard | 2 |
| 18***63 | Lighting Group-Flood; -Radiator Guard | 1 |
8r-5645 Lighting Gp-Stop -2-Lamp, Rear
| 13***26 | Lamp Group-Signal; (24-Volt, Stop, Tail)(Stop/Tail) | 2 |
| 23***52 | Spacer | 4 |
| 23***15 | Clip As | 2 |
194-6722 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 18***40 | Socket-Connector; (14-Ga To 18-Ga)(14-Ga To 18-Ga) | 3 |
| 19***22 | Sensor Group-Pressure; -Atmospheric Air | 1 |
167-1709 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***09 | Sensor Group-Pressure; -Injection Actuation Oil | 1 |
| 9X***13 | Sleeve (Order By cm)(Use As Required) | 0 |
194-6724 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 19***26 | Harness As-Sensor; (16-18 Ga Wire)(Engine Oil Temperature) | 3 |
| 19***24 | Sensor Group-Pressure; -Air Inlet Manifold | 1 |
194-6725 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 18***40 | Socket-Connector; (14-Ga To 18-Ga)(14-Ga To 18-Ga) | 3 |
| 19***25 | Sensor Group-Pressure; -Engine Oil | 1 |
265-9033 Sensor Gp-Speed
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 2 |
| 19***26 | Harness As-Sensor; (16-18 Ga Wire)(Engine Oil Temperature) | 3 |
| 19***27 | Harness As-Sensor; (14-Ga Wire)(Engine Oil Temperature) | 3 |
106-0735 Sensor Gp-Temperature
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***35 | Sensor Group-Temperature; -Engine Oil | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
102-2240 Sensor Gp-Temperature
| 10***40 | Sensor Group-Temperature; -Output Transfer Gear Oil | 1 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
194-8724 Starting Aid Gp-Ether
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 19***24 | Starting Aid Group-Ether | 1 |
| 19***25 | Bracket As | 1 |
194-8726 Starting Aid Gp-Ether
| 01***03 | Connector | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 11***54 | Nozzle As-Ether | 1 |
100-4417 Switch Gp-Flow
| 10***17 | Switch Group-Flow; -Engine Coolant | 1 |
| 17***08 | Switch Group-Flow; -Engine Coolant | 1 |
| 2B***95 | Cap Screw--Tube Assembly To Air Inlet Pipe | 2 |
109-6904 Warning Gp-Backup
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 10***04 | Warning Group-Backup | 1 |
| 21***00 | Back-Up Alarm Assem. | 1 |
196-3691 Wiring Gp-Engine
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 0S***20 | Bolt--Customer Grounding Bolt | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
193-0115 Wiring Gp-Rear
| 08***38 | Sleeve; (11x20x9mm Thk) | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 2 |
| 15***70 | Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness) | 3 |
109-0401 Wiring Gp-Unit Injector
| 03***34 | Seal-O-Ring | 1 |
| 10***61 | Clip | 1 |
| 10***01 | Wiring Group-Unit Injector | 1 |
Engine Arrangement
264-1320 Conversion Ar-Engine
| 26***20 | Conversion Ar-Engine | 1 |
| 26***25 | Engine Ar | 1 |
| 33***56 | Installation Group-Engine | 1 |
264-1325 Engine Ar
| 10***17 | Switch Group-Flow; -Engine Coolant | 1 |
| 10***48 | Support Group-Engine | 1 |
| 10***52 | Cylinder Head Group | 1 |
331-9056 Installation Gp-Engine
| 19***81 | Lines Group-Air Conditioner | 1 |
| 19***04 | Fumes Disposal Group | 1 |
| 19***26 | Starting Aid Group-Ether | 1 |
Frame And Body
195-5013 Baffle Gp-Radiator
| 19***58 | Support As | 1 |
| 19***63 | Panel As | 1 |
| 19***13 | Baffle Group-Radiator | 1 |
331-9540 Conversion Gp-Enclosure
| 19***08 | Hood & Guard Group | 1 |
| 19***58 | Shield Group-Engine Compartment | 1 |
| 19***94 | Firewall Group | 1 |
191-8445 Cover Gp-Access -Radiator
| 19***45 | Cover Group-Access; -Radiator | 1 |
| 19***46 | Panel As | 1 |
| 5P***11 | Seal 1.30 M (56.68 In.) | 2 |
193-7507 Door Gp-Access -Lh
| 10***83 | Plate | 1 |
| 13***66 | Nut; (M14x2-Thd) | 2 |
| 16***28 | Latch As | 1 |
193-5950 Door Gp-Access -Rh
| 10***83 | Plate | 1 |
| 13***66 | Nut; (M14x2-Thd) | 2 |
| 16***28 | Latch As | 1 |
193-5494 Firewall Gp
| 12***76 | Cam-Latch | 1 |
| 17***81 | Latch Assem. | 1 |
| 19***94 | Firewall Group | 1 |
191-8450 Guard Gp-Radiator
| 13***82 | Bracket As | 2 |
| 19***42 | Plate | 2 |
| 19***50 | Guard Group-Radiator | 1 |
192-3808 Hood & Guard Gp
| 19***08 | Hood & Guard Group | 1 |
| 19***18 | Grill As-Top | 1 |
| 19***12 | Grill As-Side | 4 |
193-4016 Panel Gp-Side -Lh
| 13***08 | Spacer; (8.7x20x45-mm Thk) | 3 |
| 19***16 | Panel Group-Side; -Lh | 1 |
| 19***19 | Post As | 1 |
193-5952 Panel Gp-Side -Rh
| 19***39 | Panel As-Side; (Front, Lh) | 1 |
| 19***50 | Door Group-Access; -Rh | 1 |
| 19***52 | Panel Group-Side; -Rh | 1 |
192-7358 Shield Gp-Engine Compartment
| 13***08 | Spacer; (8.7x20x45-mm Thk) | 3 |
| 19***58 | Shield Group-Engine Compartment | 1 |
| 19***95 | Shield | 1 |
Fuel System
125-3431 Drive Gp-Unit Inj Hyd Pump
| 11***35 | Pin | 1 |
| 12***31 | Drive Group-Unit Inj Hydraulic Pump | 1 |
| 18***44 | Drive Group-Unit Inj Hydraulic Pump | 1 |
180-6644 Drive Gp-Unit Inj Hyd Pump
| 03***01 | Bolt; --To Reverse Shaft Bearing Retainer | 2 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 12***40 | Plate | 1 |
232-1173 Injector Gp-Fuel
| 11***98 | Adapter-Injection | 1 |
| 11***22 | Seal-Rectangular | 1 |
| 13***69 | Bolt-Socket Head | 2 |
138-6256 Kit-Seal -Unit Injector Hydraulic Pump
| 03***53 | Seal-O-Ring; (08.92mm Id) | 3 |
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 03***39 | Seal-O-Ring (Id=9.25mm) | 1 |
220-4296 Lines Gp-Fuel Filter
| 03***33 | Seal-O-Ring; (12.42mm Id) | 8 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 6 |
109-0399 Lines Gp-Injector Hyd Pump
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 3 |
| 10***02 | Tube As | 1 |
| 10***99 | Lines Group-Injector Hydraulic Pump | 1 |
126-7292 Pump & Mtg Gp-Unit Inj Hyd
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
209-2785 Pump Gp-Fuel Injection
| 10***26 | Clamp-Injector | 1 |
| 11***21 | Seal-Rectangular | 2 |
| 11***08 | Elbow-Injector | 1 |
235-2026 Pump Gp-Unit Injector Hyd
| 03***39 | Seal-O-Ring (Id=9.25mm) | 2 |
| 03***42 | Seal-O-Ring; (11.89mm Id) | 3 |
| 13***05 | Gasket-Housing | 1 |
235-2024 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 11***20 | Coupling | 1 |
| 14***50 | Pump Group-Fuel Transfer | 1 |
282-1915 Valve Gp-Check
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 28***15 | Valve Group-Check; -Fuel | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 1 |
161-2309 Valve Gp-Fuel
| 03***43 | Seal-O-Ring | 1 |
| 10***06 | Seal-O-Ring (10.52mm Id) | 1 |
| 10***85 | Seal-O-Ring (6.07mm Id) | 2 |
190-0016 Valve Gp-Fuel
| 03***53 | Seal-O-Ring; (08.92mm Id) | 3 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 19***16 | Valve Group-Fuel | 1 |
165-1536 Valve Gp-Pressure Control
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 03***28 | Seal-O-Ring | 1 |
| 10***03 | Seal-O-Ring; (7.65mm Id) | 1 |
107-0677 Valve Gp-Solenoid
| 03***28 | Seal-O-Ring | 1 |
| 03***39 | Seal-O-Ring (Id=9.25mm) | 1 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
Hydraulic System
332-0038 Conversion Gp-Hydraulic System
| 16***50 | Bracket As | 1 |
| 19***21 | Lines Group-Hydraulic Fan | 1 |
| 19***00 | Pump Group-Piston; -Hydraulic Fan | 1 |
191-4598 Cooler Gp-Hydraulic Oil
| 19***98 | Cooler Group-Hydraulic Oil | 1 |
| 19***99 | Core As-Hydraulic Oil Cooler | 1 |
| 19***00 | Core As-Hydraulic Oil Cooler | 1 |
192-5621 Lines Gp-Hydraulic Fan
| 10***52 | Tee-Union | 1 |
| 10***77 | Adapter | 1 |
| 13***36 | Hose As | 1 |
194-1013 Motor & Mtg Gp-Hydraulic Fan
| 15***66 | Motor Group-Piston; -Hydraulic Fan | 1 |
| 19***29 | Valve Group-Makeup; -Hydraulic Fan Motor | 1 |
| 19***13 | Motor & Mtg Group-Hydraulic Fan | 1 |
159-7166 Motor Gp-Piston
| 11***66 | Head | 1 |
| 13***73 | Bolt-Socket Head; (M16x2x35-mm) | 6 |
| 15***66 | Motor Group-Piston; -Hydraulic Fan | 1 |
194-6800 Pump Gp-Piston
| 09***05 | Bolt-Socket Head; (M14x2x40-mm) | 4 |
| 10***46 | Plug | 2 |
| 13***15 | Swashplate As | 1 |
178-4005 Rotating Gp-Motor
| 11***65 | Plate | 1 |
| 11***18 | Screw; (M8x20-mm) | 7 |
| 12***99 | Plate-Port | 1 |
197-0673 Rotating Gp-Pump
| 16***79 | Pin | 3 |
| 19***25 | Plate | 1 |
| 19***26 | Barrel | 1 |
185-9357 Valve Gp-Check
| 18***57 | Valve Group-Check; -Steer, Hydraulic Fan Oil Clr Bypass | 1 |
| 5K***90 | Seal-To Hydraulic Cooler Inlet Port | 1 |
| 6E***54 | Valve Group-Check; (Steer, Hydraulic Fan Oil Clr Bypass) | 1 |
193-0629 Valve Gp-Makeup
| 19***29 | Valve Group-Makeup; -Hydraulic Fan Motor | 1 |
| 1U***22 | Bearing-Sleeve; (12.65mm Id) | 1 |
| 1U***23 | Plug Assem. | 1 |
184-5174 Valve Gp-Pump Control -Pressure, Flow Compensator
| 03***43 | Seal-O-Ring | 1 |
| 10***45 | Valve-Orifice; (Hydraulic Oil Check) | 1 |
| 18***74 | Valve Group-Pump Control; -Pressure, Flow Compensator-Steering Piston Pump | 1 |
Lubrication System
119-8583 Fastener Gp-Oil Pump Mounting -Engine
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 2 |
| 11***83 | Fastener Group-Oil Pump Mounting; -Engine | 1 |
206-5092 Filler Gp-Engine Oil
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 14***35 | Clip-2 Piece | 1 |
4n-2357 Filter Gp-Engine Oil
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 1R***16 | Filter As-Engine Oil; (Standard Efficiency) | 2 |
| 2P***03 | Base As-Oil Filter; (Engine) | 2 |
194-1604 Fumes Disposal Gp
| 12***40 | Bracket | 1 |
| 19***02 | Tube | 1 |
| 19***03 | Bracket As | 1 |
206-5086 Gauge Gp-Oil Level (Dipstick) -Engine
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 06***39 | Seal-O-Ring | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
188-4641 Lines Gp-Engine Oil
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 1 |
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 2 |
122-1898 Lines Gp-Engine Oil Filter
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 6 |
189-0747 Lines Gp-Turbocharger Oil
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 6 |
| 11***26 | Tube As-Drain | 1 |
| 11***87 | Seal-O-Ring (23.16 mm Id) | 2 |
116-1980 Pump Gp-Engine Oil
| 10***82 | Shaft As-Pump Drive | 1 |
| 10***73 | Shaft As-Idler | 1 |
| 11***79 | Body As-Oil Pump | 1 |
Operator Station
191-4605 Condenser & Mtg Gp-Refrigerant
| 19***23 | Condenser As-Refrigerant | 1 |
| 19***05 | Condenser & Mtg Group-Refrigerant | 1 |
| 19***06 | Bracket As | 1 |
192-7381 Lines Gp-Air Conditioner
| 08***44 | Spacer; (13.3x21.3x25-mm Thk) | 1 |
| 10***00 | Fitting As-Air Conditioner; (Quick Disconnect)(Refrigerant) | 2 |
| 10***97 | Valve As; (Low Side) | 1 |
Service Equipment And Supplies
166-5985 Kit-Compensator
| 16***85 | Kit-Compensator | 1 |
844 serial number reference
The PIN plate on the 844 wheel dozer is riveted to the front frame on the right-hand side near the articulation hitch, with the number also stamped into the frame steel as a backup. The PIN reads as a 3-character prefix followed by a sequential unit number; the prefix ties to one specific model/production series (844, 844H, or 844K) and the digits identify the individual unit built under that series.
| Prefix | Identifies | Notes |
|---|---|---|
| BBN | 844 wheel dozer, base/early series | Serial range BBN1-UP. Cat 3412 mechanical diesel. Predates the H and K suffix models. Confirm exact production years with dealer. |
| 2KZ | 844 wheel dozer, base/later series | Serial range 2KZ1-UP (also seen as 2KZ00001-UP). Same base 844 generation as BBN but updated to the Cat 3412E electronic diesel (HEUI fuel system, electronic engine management). Confirm exact production years with dealer. |
| BTW | 844H wheel dozer | Serial range BTW00001-UP. Cat C27 ACERT diesel. Confirmed across independent parts-catalog and manual listings tying this exact range to the 844H. |
| K4Y | 844K wheel dozer | Serial range K4Y00001-UP. Cat C27 diesel. One of several parallel production-batch prefixes for the 844K; confirmed in parts-catalog listings naming this exact range against the 844K. Confirm exact production years with dealer. |
| KLS | 844K wheel dozer | Serial range KLS00001-UP. Cat C27 diesel. Parallel 844K production-batch prefix; confirmed in parts-catalog listings naming this exact range against the 844K. Confirm exact production years with dealer. |
| M4R | 844K wheel dozer | Serial range M4R00001-UP. Cat C27 ACERT diesel. Parallel 844K production-batch prefix; confirmed in parts-catalog and schematic-manual listings naming this exact range against the 844K. Confirm exact production years with dealer. |
| MBE | 844K wheel dozer | Serial range MBE1-UP. Cat C27 diesel. Parallel 844K production-batch prefix; confirmed across multiple parts-catalog listings naming this exact range against the 844K. Confirm exact production years with dealer. |
Frequently asked questions
What engine does the Cat 844 wheel dozer use?
It depends on series. Earlier 844 units use the Cat 3412E V12 diesel, rated around 620-625 hp net flywheel power (about 675 hp gross). The 844H, 844K, and the current letter-dropped 844 use the Cat C27 ACERT V12 diesel, rated from roughly 687 hp up to about 752 hp gross depending on emissions tier and rating standard. Confirm the exact engine and rating against the machine's data plate, since output varies by series and configuration.
What is the operating weight of the Cat 844?
Operating weight runs roughly 70,800-74,900 kg (156,100-165,100 lb) depending on series and configuration. Earlier 3412E and 844H-generation machines sit nearer the lower end; the 844K and current 844 run nearer the upper end. Blade type, counterweight, and tire choice shift the figure further, so treat it as a range rather than one fixed number, and verify against the specific unit's configuration.
What replaced the Cat 844 wheel dozer?
Nothing outside its own lineage. Caterpillar kept advancing the 844 in place rather than replacing it with a different model number. The 3412E-powered original 844 gave way to the C27 ACERT-powered 844H, then the 844K, and Caterpillar has since dropped the letter suffix to market the current C27 ACERT generation simply as the 844 again. It remains the mid-size model in Cat's wheel dozer range, between the 834 and the 854.
What 844 owners discuss
What powertrain does the Caterpillar 844 wheel dozer use, and how does it behave under load?
This generation of the 844 (ahead of the 844H/844K) runs a torque-converter drive with three forward and three reverse speeds; a direct-drive option was also offered on this model. Under sustained digging or heavy blade loads, operators watch converter oil temperature and downshift rather than lugging the engine - holding the converter near stall for long stretches is the quickest way to cook the clutch packs. The converter has to manage a lot of mass on this machine (operating weight runs roughly 70-71 tonnes / 155,000-156,000 lb), so heat management matters more here than on the smaller wheel dozers in the line.
What wear patterns are typical for a wheel dozer like the 844?
There's no track chain to wear on a wheel machine - load falls on the tires, the center articulation joint, and the planetary final drives at each wheel. Large rock-service tires take steady chunking and cutting damage in quarry and mining duty and are one of the biggest recurring cost items owners mention. The center-pivot articulation joint rides on tapered roller bearings meant to carry both dozing loads and load-and-carry work, but like any pivot it develops play over time and needs regular greasing to avoid accelerated wear. Final drives are sealed planetary units at each wheel; contamination or a seal failure shows up as metal in a final-drive oil sample before it shows up as noise.
What engine issues come up most with this version of the 844?
This generation of the 844 runs the Cat 3412E, a 12-cylinder HEUI-fuel engine, not the C27 ACERT used in the later 844H/844K. Mechanics and owners describe the 3412E as one of the more dependable engines Cat put in heavy iron from that era, with plenty of reports of it running well past 10,000 hours between overhauls when the oil coolers and turbocharger get proper attention. The recurring complaints are narrower: injector wiring and connectors are the weak point on high-hour, outdoor-service units, not the injectors or turbo failing outright.
What electrical or sensor problems show up on the 3412E in the 844?
Two issues come up repeatedly. Corroded or oil-fouled connector pins on the HEUI injector wiring harness cause erratic high-voltage faults on individual cylinders that look like a misfire or bad injector, even though the injector itself tests fine when pulled. Separately, a failing boost-pressure sensor can read near-zero at working RPM without lighting any active fault code - the only symptom is flat power and black smoke under load, so a manual boost gauge check is worth more than trusting the dash if the machine feels down on power. Have your dealer verify any fault code or sensor reading before swapping injectors or a turbo on this basis.
How does the steering and hydraulic system behave day to day?
The 844 steers through center-frame articulation with hydraulic assist - the whole front half of the machine swings on the pivot rather than turning on a front axle. That gives a tight turning radius for the size of the machine, but it also means pivot-bearing wear shows up directly as steering slop: a clunk or looseness on direction change points at the pivot pins/bearings, not the steering valve. On the hydraulic side, owners flag the blade lift and tilt circuits for cylinder seal weep as machines age; rod-seal leakage at the tilt cylinder on higher-hour units is treated as routine wear-item maintenance rather than a defect. Have your dealer verify pivot bearing play and cylinder drift during a full inspection before committing to major hydraulic work.
What do experienced operators say about running technique to keep wear down?
The advice that repeats across operator discussion is to avoid holding the converter near stall for long periods and to not force a cut by spinning the tires - modulate ground speed and blade depth instead of forcing rimpull through wheel slip, since tire slip is what chews through the expensive rock-service tires fastest. Daily habits operators stress: check engine oil, hydraulic oil, and coolant before start-up, and walk the machine at the end of shift checking for hydraulic weeps and greasing the articulation pivot fittings, since that joint carries the whole machine's steering load.
What should you check when buying a used Caterpillar 844 wheel dozer?
Cover the same ground as any large wheel machine, weighted toward this model's known weak points. Look closely at the rock-service tires for chunking, sidewall damage, and uneven wear - they're one of the most expensive line items to replace at this size. Check the center articulation joint for play by having someone watch the pivot while the steering is worked lock to lock; visible movement means bearing wear. Pull an engine oil sample and check the maintenance history for oil-cooler and turbo service on the 3412E, since that history is what separates a machine at 5,000 hours of remaining life from one at 12,000. Inspect the injector wiring harness connectors for corrosion or old field repairs - a history of misfire complaints traces back here more often than to the injectors. Check final-drive oil for metal and look for external leakage at the blade lift and tilt cylinders. Have your dealer verify hour-meter accuracy against ECM history and pull a full fault-code log before finalizing the purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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