Caterpillaroff-highway trucktractor
Caterpillar 772B
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 772B is an articulated off-highway tractor, not a rigid-frame dump truck. It couples to a separate bottom-dump wagon through a yoke-type drawbar hitch and hauls loose bulk material such as coal, aggregate, and overburden in mining and quarry service. It is part of Caterpillar's 768C/772B/776C Off-Highway Tractor line, sold as tractor-and-wagon combinations rather than integral-body haulers. The 772B runs a Cat 3412 V12 diesel rated near 509 kW (682 hp) gross power, while the smaller 768C uses a Cat 3408 V8 (about 353 kW/474 hp gross) and the larger 776C uses a Cat 3508 V8 (about 686 kW/920 hp gross). Empty tractor weights across the line span roughly 24.6 to 52 t (54,285 to 114,720 lb), with the 772B itself at about 32.9 t (72,550 lb) empty. The design belongs to the mechanically governed diesel era of the late 1980s through mid-1990s and was phased out as Caterpillar's heavy-haul lineup shifted toward rigid-frame trucks.
In today's used and parts market, the 772B is an obscure, long-discontinued machine, largely absent from current spec databases, which instead index the unrelated, modern rigid-frame 772/772G haul truck built from 2007 on with a C18 ACERT engine. Its Cat 3408 and 3412 engine family was shared across contemporary Caterpillar trucks and tractors of the same period, so major engine internals, injection components, and turbocharger hardware carry real parts commonality with those machines even though the tractor-wagon chassis itself is unique to this line. Surviving 772B units still turn up in older mining and quarry fleets running bottom-dump wagon trains, valued for simple mechanical engine governance and lower repair complexity than later electronically controlled haul trucks. Hitch, wagon, and running-gear parts for the trailing unit typically route through Caterpillar's hauling-equipment product group rather than standard truck-body parts channels.
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 772B specifications
Engine
| Engine model | Cat 3412, V-12 diesel |
| Gross power | 509 kW (682 hp) at 2000 rpm, per the factory Specalog for this tractor family |
| Net power | 485 kW (650 hp) at 2000 rpm |
| Displacement | 27.0 L (1,647.7 cu in) |
| Cylinders | 12, V-configuration |
| Aspiration | Turbocharged, aftercooled |
| Emissions tier | Pre-emissions-tier, mechanically governed diesel; no factory Tier/EPA rating published |
| Max torque | 2758 N·m (2034 ft-lb) |
Weights
| Operating weight (empty) | Approx. 32.9 t (72,550 lb), tractor unit only with 10% fuel, per the factory Specalog |
| Maximum hitch/tow load | Approx. 51.8 t (114,000 lb) — this is a prime-mover tractor; load is carried by the towed bottom-dump wagon, not the tractor itself |
| Ground pressure | Not published |
Dimensions
| Width over tires | 3.79 m (12.44 ft) |
| Height to top of cab | 3.89 m (12.77 ft) |
| Wheelbase | 4.19 m (13.75 ft) |
| Ground clearance | 0.585 m (1.92 ft) |
| Overall transport length | Not documented for this exact configuration — verify with dealer or shop manual |
Performance
| Max forward travel speed | 67.1 km/h (41.7 mph) |
| Transmission | 7-speed electronically controlled automatic powershift |
| Standard tire size | 24.00-35, 36PR (E-3) |
| Gradeability | Not published |
Service capacities (summary)
| Fuel tank | Approx. 700 L (185 US gal) |
| Steering hydraulic system (total) | 81 L (21.5 US gal) |
| Engine oil (crankcase, with filter) | 68 L (18.0 US gal) |
| Cooling system | 151 L (40 US gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
772B fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 68 L (18.0 US gal) | Cat DEO (Diesel Engine Oil), multigrade. SAE 10W-30 for ambient -18°C to 40°C (-4°F to 104°F); SAE 15W-40 for ambient -9.5°C to 50°C (15°F to 122°F). Pick grade by expected cold start and peak operating temperature. |
| Cooling system | 151 L (40 US gal) | Cat DEAC (Diesel Engine Antifreeze/Coolant), glycol-based, mixed with water to climate. Full-strength or extended-life glycol coolant is an acceptable factory-fill alternative on later service fills. |
| Fuel tank | 700 L (185 US gal) | No. 2-D diesel fuel per ASTM D975. Switch to No. 1-D in cold weather for better cold-flow and easier starting. |
| Transmission hydraulic tank | 81 L (21.5 US gal) | Cat TDTO (Transmission/Drive Train Oil, TO-4 spec). Graded SAE 10W, 30, or 50; select by ambient temperature and season. |
| Transmission system, total (includes tank) | 100 L (26.6 US gal) | Cat TDTO (TO-4 spec), same fluid as the transmission tank fill; total system volume includes lines and cooler. |
| Brakes and torque converter tank | 220 L (58 US gal) | Cat TDTO (TO-4 spec). Oil-cooled multi-disc brakes and torque converter share this circuit and fluid. |
| Brakes and converter system, total (includes tank) | 393 L (104 US gal) | Cat TDTO (TO-4 spec), same fluid as the brake/converter tank fill; total system volume includes cooling circuit. |
| Differential and final drives (rear axle, combined) | 155 L (41 US gal) | Cat TDTO (TO-4 spec). Planetary final drives use full-floating axles; differential and both final drives share this fluid. |
| Steering tank | 55 L (14.5 US gal) | Cat TDTO (TO-4 spec), separate hydraulic circuit from the main transmission/brake system. |
| Steering system, total (includes tank) | 81 L (21.5 US gal) | Cat TDTO (TO-4 spec), same fluid as the steering tank fill; total system volume includes cylinders and lines. |
| Grease (chassis and hitch lubrication points) | Not specified by volume — service per lubrication schedule | Cat Multipurpose Grease (MPGM), NLGI 2 lithium-complex. Use an extreme-application grease for sustained sub-zero or high-heat service. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 772B maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the 772B beyond the schedule
Predictive Maintenance & Fluid Analysis
Track the 3412 diesel and its planetary powertrain with scheduled oil sampling: engine crankcase, transmission/torque-converter, differential and final drive, and steering hydraulic system. Watch brake cooling-oil samples closely, since the oil-cooled disc packs run continuously through a heat exchanger and pick up wear metal early. Monitor coolant condition and additive concentration between changes. Inspect the hitch yoke and kingpin bushings visually at each interval; freeplay trending toward the 105-degree turnstop limit signals wear before it becomes a driveline failure.
Corrective & Common Repairs
Common 772B repairs center on the mechanical 3412 fuel system: injection pump timing, adjustment-free injector valves, and turbocharger/aftercooler seals. Steering cylinder rod seals and suspension cylinder leakage are frequent wear points given their dual role as kingpins. Brake cooling-oil contamination and disc glazing show up after long descents under load. The yoke-type hitch takes the brunt of tractor-wagon shock loading, so kingpin bushing wear and turnstop damage are recurring corrective items, along with transmission clutch-pack wear flagged by the electronic shift control's fault code memory.
Overhaul & Rebuild Points
Major rebuild points on the 772B follow the 3412's mechanical top end: cylinder liners, pistons, and adjustment-free injection pumps at engine overhaul. The Cat seven-speed powershift transmission and torque converter warrant clutch-pack and seal rebuilds as hours accumulate, along with planetary final drive gear sets and differential carrier bearings. The yoke hitch and kingpin base are structural wear items under constant articulation load and should be inspected for cracking or elongation at overhaul, since hitch failure disables the entire tractor-wagon coupling.
Seasonal & Environment Servicing
Cold-weather starts on the mechanically governed 3412 depend on functioning glow/ether-start aids, correct coolant concentration, and winter-grade fuel to prevent gelling in the injection system. In wet or muddy pit conditions, grease the hitch yoke, kingpin, and steering/suspension cylinder pivots more frequently than the standard interval, and check brake cooling-oil for water intrusion. Hot, dusty mining sites call for more frequent air cleaner service and radiator/aftercooler core cleaning to protect the turbocharged diesel from restricted airflow.
772B common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 1R-0749 | Filter-Fuel | Fuel system service | Check fitment → |
| 129-0372 | Filter As-Water Sep & Fuel | Fuel system service | Check fitment → |
| 6I-2505 | Filter Element As-Air | Air intake service | Check fitment → |
| 6I-2506 | Filter Element As-Air | Air intake service | Check fitment → |
| 1R-1808 | Filter As-Engine Oil | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
772B fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Low Engine Oil Pressure warning light (red) | Dash warning lamp and gauge indicate engine oil pressure has dropped below the safe operating range for the mechanically governed 3408 or 3412 engine. | Low oil level, plugged oil filter, worn oil pump, or a failed pressure sender/switch. | Stop and idle the engine immediately, check oil level and filter condition, then confirm actual pressure with a mechanical test gauge before returning the machine to work. |
| High Coolant Temperature warning light (red) | Dash thermometer-style warning lamp and gauge signal coolant temperature above the normal operating band. | Low coolant level, plugged radiator core, slipping or failed fan drive, or a stuck thermostat. | Reduce load and let the engine idle to cool, then check coolant level and radiator/fan condition, and verify the reading with a manual temperature gauge before resuming normal operation. |
| High Torque Converter (Power Train) Oil Temperature warning | Power train oil temperature gauge and warning lamp indicate converter oil has exceeded its safe range, historically flagged near 135 degrees C (275 degrees F) on Cat gauges of this era. | Low power train oil level, plugged oil cooler, prolonged converter stall or lugging, or a failing cooler bypass valve. | Ease off throttle and let the converter cool at reduced load, then check power train oil level and cooler for restriction before returning to full duty. |
| Air Cleaner (Engine Air Filter) Restriction Indicator | A pop-up flag or gauge on the air intake system shows the air filter element has reached its service restriction limit. | Dust-loaded primary air filter element, or a torn/collapsed element causing a false reading. | Service or replace the air filter element and reset the indicator; inspect intake piping and seals for leaks if the flag reappears quickly. |
| Low Brake System Air Pressure warning light/buzzer | Warns that air pressure supplying the service brake system has dropped below the safe minimum for reliable braking. | Air compressor fault, leaking air lines or fittings, or a failed low-pressure switch. | Stop the machine in a safe location and do not move it until pressure is restored; check the compressor, lines, and air reservoirs for leaks. |
| Charging System (Alternator) warning light / Ammeter fault | Dash ammeter or warning lamp indicates the charging system is not maintaining correct battery voltage or current. | Failed alternator, broken or slipping drive belt, or a bad voltage regulator. | Check belt tension and wiring connections first, then test alternator output with a multimeter against service manual specifications. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
772B attachments & work tools
Drawbar / Tractor-Wagon Coupling
The 772B connects to its towed bottom-dump wagon through a yoke-type hitch rather than carrying an integral hydraulic dump body. The tractor's front suspension cylinders double as kingpins for the hitch, and turnstops limit wagon oscillation to about 105 degrees in each direction. Factory maximum hitch/tow rating is approximately 51.8 t (114,000 lb) per the tractor-family Specalog; the tractor itself supplies motive power and steering, while the wagon carries and discharges the load independently.
Bottom-Dump Wagon
Caterpillar catalogued a matching bottom-dump wagon for this tractor family as a separate serviced unit from the tractor itself. The wagon discharges its load through bottom gates rather than a raised body, suited to loose-material haulage such as coal, aggregate, or overburden. Capacity and configuration vary by wagon unit and are not consistently documented across sources — confirm against the specific wagon paired with a given tractor.
All 772B assemblies by section
Every catalogued assembly group for the Caterpillar 772B. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
6i-2588 Air Cleaner Gp
| 10***50 | Film; (Air Cleaner) (Radial Seal) (On Air Cleaner Cover) | 1 |
| 6I***05 | Filter Element As-Air; -Primary | 1 |
| 6I***06 | Filter Element As-Air; -Secondary | 1 |
6i-2586 Air Cleaner Gp
| 10***50 | Film; (Air Cleaner) (Radial Seal) (On Air Cleaner Cover) | 1 |
| 6I***05 | Filter Element As-Air; -Primary | 1 |
| 6I***06 | Filter Element As-Air; -Secondary | 1 |
7c-4782 Air Cleaner Gp
| 10***66 | Gasket | 2 |
| 15***14 | Precleaner Group; -Air Cleaner | 2 |
| 6I***86 | Air Cleaner Group; -Rh | 1 |
129-6836 Aftercooler Gp-Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 2 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 20 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 2 |
103-4052 Cartridge Gp-Turbocharger
| 10***52 | Cartridge Group-Turbocharger | 1 |
| 10***25 | Nut; (3/8-24-Thd) | 1 |
| 13***17 | Shaft As-Turbine | 1 |
321-6724 Conversion Gp-Air Inlet & Exh
| 14***33 | Lines Group-Air; -Intake | 1 |
| 14***34 | Lines Group-Air; -Intake | 1 |
| 14***35 | Lines Group-Air; -Turbocharger Exhaust | 1 |
142-4034 Lines Gp-Air -Intake
| 10***68 | Plate As | 4 |
| 10***01 | Manifold As | 1 |
| 12***39 | Tube As | 1 |
142-4033 Lines Gp-Air -Intake
| 12***42 | Tube As | 1 |
| 12***71 | Tube | 1 |
| 12***72 | Tube | 1 |
142-4035 Lines Gp-Air -Turbocharger Exhaust
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 4 |
| 12***08 | Elbow-Exhaust | 1 |
| 14***35 | Lines Group-Air; -Turbocharger Exhaust | 1 |
129-6832 Lines Gp-Air -Turbocharger Inlet
| 11***23 | Tube As-Turbocharger; (Lh) | 1 |
| 11***35 | Pipe-Turbocharger Outlet | 1 |
| 12***32 | Lines Group-Air; -Turbocharger Inlet | 1 |
164-4603 Manifold Gp-Exhaust
| 10***12 | Spacer; (11.13x19.05x53-mm Thk) | 20 |
| 11***23 | Spacer; (11.13x19.05x19-mm Thk) | 4 |
| 12***52 | Gasket-Exhaust Manifold | 12 |
150-1714 Precleaner Gp -Air Cleaner
| 15***14 | Precleaner Group; -Air Cleaner | 1 |
| 2S***93 | Precleaner Cover Assembly | 1 |
| 2S***08 | Collector-Dust; (Air Precleaner) | 1 |
116-4120 Turbocharger Gp
| 10***52 | Cartridge Group-Turbocharger | 1 |
| 10***98 | Housing (Turbin) | 1 |
| 11***20 | Turbocharger Group | 1 |
129-6835 Turbocharger Gp
| 11***20 | Turbocharger Group | 2 |
| 12***35 | Turbocharger Group | 1 |
| 1S***95 | Gasket-Turbocharger To Manifold; Gasket Turbocharger To Manifold | 2 |
Basic Engine
4n-3825 Gear Gp-Rear
| 1B***75 | Bolt (" " " ); Bolt ( " " " ) | 4 |
| 4N***25 | Gear Group-Rear; Rear Timing Gear Group | 1 |
| 4W***85 | Gear-Camshaft; (86-Teeth) | 1 |
6n-2415 Gear Gp-Rear
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 5 |
| 16***81 | Seal-Lip Type | 1 |
4n-6842 Air Compressor Gp
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 5 |
| 12***48 | Seal-Integral | 1 |
| 1F***58 | Nut-Full; (1/2-13-Thd)(Air Lines) | 3 |
4n-7378 Air Compressor Gp
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 6 |
| 11***37 | Kit-Piston Ring; (Compressor 5 Ring) | 1 |
| 1W***03 | Plug | 2 |
108-1553 Camshaft Gp
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 10***74 | Gear-Camshaft Drive; (86-Teeth) | 1 |
| 10***53 | Camshaft Group | 1 |
129-5229 Cover Gp-Cylinder Block
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 5 |
| 12***29 | Cover Group-Cylinder Block | 1 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 8 |
131-2002 Cover Gp-Flywheel Housing
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 3 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 3 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 1 |
126-0768 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***21 | Support-Housing; (Rh) | 1 |
129-6830 Cover Gp-Oil Pan -Engine
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 4 |
| 10***39 | Plug-Drain; (Engine Oil Pan) | 1 |
138-6642 Cover Gp-Valve Mechanism
| 10***88 | Base-Valve Mechanism Cover | 6 |
| 11***84 | Cover-Valve Mechanism | 2 |
| 11***15 | Cover As-Valve | 4 |
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
| 14***67 | Seal Group-Crankshaft; (Front) | 1 |
| 14***68 | Seal-Crankshaft; (Rear)(Flywheel Housing) | 1 |
| 15***40 | Gear-Crankshaft; (99-Teeth) | 1 |
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 |
105-3800 Cylinder Head As
| 10***00 | Cylinder Head As | 1 |
| 1W***83 | Insert-Valve Seat; (Exhaust)(Standard) | 12 |
| 3B***23 | Core Plug--Flywheel Housing Pinion Shaft Hole | 12 |
108-1552 Cylinder Head Gp
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 06***61 | Seal-O-Ring (Id=40.87mm) | 12 |
| 10***08 | Kit; (Connecting Plug) (3 Pin) (Includes Plug As And Wedge) | 1 |
108-1887 Cylinder Head Gp
| 10***94 | Dowel | 2 |
| 10***00 | Cylinder Head As | 1 |
| 10***87 | Cylinder Head Group | 1 |
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 |
9n-0725 Drive Gp-Accessory
| 5P***40 | Seal-O-Ring | 1 |
| 6B***83 | Nut,Plain,Hexagon Lever | 1 |
| 7N***22 | Gear-Compressor Drive; (46-Teeth) | 1 |
4n-7734 Flywheel Gp
| 2D***74 | Bolt; (5/8-18x6.75-In) | 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 |
129-6829 Housing Gp-Flywheel
| 03***94 | Connector-Flared | 1 |
| 03***68 | Elbow (For Use With Shallow Pan) | 1 |
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 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 |
129-5255 Lifting Gp-Engine
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 1 |
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
122-0939 Lifting Gp-Engine
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
| 11***75 | Bracket-Lifting; (Right) | 1 |
| 11***15 | Bracket-Lifting; (Left) | 1 |
129-6838 Lines Gp-Air Compressor
| 00***43 | Elbow; (12.7mm Id) | 1 |
| 00***26 | Connector; (Flared)(3/4-16 Thd, 47 mm Long) | 1 |
| 03***49 | Elbow; (90 Degree, 37 Degree Flared) | 1 |
132-3627 Pan Gp-Oil -Engine
| 13***27 | Pan Group-Oil; -Engine | 1 |
| 2P***03 | Bolt-Washer Head; (3/8-16x1.25-In) | 38 |
| 6N***96 | Gasket-Oil Pan | 1 |
192-8808 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 |
129-6827 Plug Gp-Cylinder Head
| 12***27 | 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 |
319-0785 Seal Gp-Crankshaft -Rear
| 14***68 | Seal-Crankshaft; (Rear)(Flywheel Housing) | 1 |
| 31***85 | Seal Group-Crankshaft; -Rear | 1 |
319-7401 Seal Gp-Crankshaft -Front
| 14***67 | Seal Group-Crankshaft; (Front) | 1 |
| 31***01 | Seal Group-Crankshaft; -Front | 1 |
7e-6385 Support Gp-Engine
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 4 |
| 4D***04 | Washer,Flat Cover Mtg,Accessory Drive | 4 |
| 4N***84 | Support-Front Engine | 1 |
129-6828 Trunnion Gp-Engine
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 4 |
| 12***28 | Trunnion Group-Engine | 1 |
| 4W***50 | Adapter-Support | 1 |
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
7w-1713 Core Gp-Oil Cooler
| 6V***49 | Seal-O-Ring (Id=11.89mm); (11.89-mm Id) | 2 |
| 7W***13 | Core Group-Oil Cooler; -Brake-Transmission Oil | 1 |
| 9S***91 | Plug,Machine Thread Fuel Injection Pump | 2 |
4w-0413 Core Gp-Oil Cooler
| 4W***13 | Core Group-Oil Cooler; -Rear Brake, Hoist-Front Brake, Tc | 1 |
| 5M***14 | Pipe Plug Cylinder Block Oil Pressure | 1 |
141-4109 Core Gp-Oil Cooler
| 14***09 | Core Group-Oil Cooler; -Brake, Frame Mount-Transmission, Engine Mount-Tc, Bk, Hoist, Engine Mount | 1 |
| 8T***64 | Plug-Pipe; (1/8-27-Thd)(Cylinder Head) | 2 |
142-4037 Lines Gp-Coolant Drain
| 00***00 | Tee-Special | 1 |
| 06***02 | Hose Assem. 91.44 cm(36 In.) | 1 |
| 14***37 | Lines Group-Coolant Drain | 1 |
134-0105 Lines Gp-Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 8 |
131-3347 Lines Gp-Water -Aftercooler
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 3 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 3 |
134-1487 Pump Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 10***85 | Retainer | 1 |
| 10***90 | Housing As-Pump | 1 |
4n-5837 Pump Gp-Water
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 10***49 | Adapter-Inlet | 1 |
| 10***96 | Pump Group-Water | 1 |
105-0196 Pump Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 10***96 | Pump Group-Water | 1 |
| 10***85 | Retainer | 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 |
Electrical And Starting System
223-2340 Control & Mtg Gp-Engine Elek
| 11***69 | Spacer-Special; (8.2x25x89.7-mm Thk) | 4 |
| 15***71 | Control Group-Engine Electronic | 1 |
| 22***40 | 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 |
321-6721 Conversion Gp-Electrical
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 0 |
| 11***75 | Control Group-Governor; -Accelerator | 1 |
| 13***58 | Plate As | 1 |
176-1602 Sensor Gp-Position
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 17***02 | Sensor Group-Position; -Accelerator Control | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
161-9931 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***31 | Sensor Group-Pressure; -Atmospheric | 1 |
| 18***36 | Socket-Connector; (16-Ga To 18-Ga) | 3 |
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 |
103-6092 Sensor Gp-Pressure
| 10***08 | Kit; (Connecting Plug) (3 Pin) (Includes Plug As And Wedge) | 1 |
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 10***92 | Sensor Group-Pressure; -Filtered Oil, Unfiltered Oil | 1 |
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 |
6v-2485 Sensor Gp-Pressure
| 10***08 | Kit; (Connecting Plug) (3 Pin) (Includes Plug As And Wedge) | 1 |
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 3E***68 | Wedge-Plug Lock; (3-Pin) | 1 |
161-9926 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***26 | Sensor Group-Pressure; -Atmospheric Air, Turbo Inlet | 1 |
| 18***40 | Socket-Connector; (14-Ga To 18-Ga)(14-Ga To 18-Ga) | 3 |
161-9925 Sensor Gp-Pressure
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***25 | Sensor Group-Pressure; -Turbocharger Inlet | 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 |
103-6093 Sensor Gp-Pressure
| 10***93 | Sensor Group-Pressure; -Turbocharger Inlet-Atmospheric, Crankcase | 1 |
| 15***89 | Tube; (3cm) | 0 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 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 |
129-6628 Sensor Gp-Speed
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 12***28 | Sensor Group-Speed; -Engine Speed/Timing | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 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 |
189-5746 Sensor Gp-Speed
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 14***36 | Pin-Connector; (14-Ga To 18-Ga) | 2 |
| 17***49 | Strap; (Marker) | 1 |
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 |
142-5683 Starting Aid Ar-Ether
| 14***83 | Starting Aid Ar-Ether | 1 |
| 14***84 | Starting Aid Group-Ether | 1 |
| 14***85 | Starting Aid Group-Ether; -Chassis | 1 |
142-5684 Starting Aid Gp-Ether
| 12***95 | Tube | 1 |
| 14***84 | Starting Aid Group-Ether | 1 |
| 6N***72 | Ether Atomizer--Spray | 1 |
142-5685 Starting Aid Gp-Ether
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 13***00 | Clip; (Tab) | 1 |
| 14***85 | Starting Aid Group-Ether; -Chassis | 1 |
338-3454 Starting Motor Gp-Electric
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 0 |
| 17***08 | Switch Group-Flow; -Engine Coolant | 1 |
| 2B***95 | Cap Screw--Tube Assembly To Air Inlet Pipe | 2 |
4n-1061 Starting Motor Gp-Electric
| 23***62 | Starting Motor Group-Electric | 1 |
| 4N***59 | Gasket; (Starting Motor) | 1 |
| 4N***61 | Starting Motor Group-Electric | 1 |
237-1962 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
| 0S***97 | Capscrew (1/4 - 28 Nf X 1 Gd8, Hex) | 13 |
100-4417 Switch Gp-Flow
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 0S***20 | Bolt--Customer Grounding Bolt | 1 |
118-9692 Wiring Gp-Engine
| 03***48 | Clip; (11.11mm .437in Id) | 5 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 11***92 | Wiring Group-Engine | 1 |
4z-6631 Wiring Gp-Shutoff
| 03***34 | Seal-O-Ring | 1 |
| 10***61 | Clip | 1 |
| 11***30 | Receptacle As-Connector; (4-Pin) | 1 |
109-0401 Wiring Gp-Unit Injector
| 10***57 | Elbow | 1 |
| 10***01 | Wiring Group-Unit Injector | 1 |
| 1N***98 | Plug; (Clutch/Brake Models Only) | 1 |
Engine Arrangement
212-2234 Engine Ar
| 10***17 | Switch Group-Flow; -Engine Coolant | 1 |
| 10***52 | Cylinder Head Group | 1 |
| 10***53 | Camshaft Group | 1 |
321-6726 Installation Gp-Engine
| 12***13 | Pump Group-Fuel Prm & Prim Filter | 1 |
| 12***23 | Gauge Group-Oil Level (Dipstick); -Engine | 1 |
| 12***46 | Filler Group-Engine Oil | 1 |
Fuel System
112-9775 Control Gp-Governor
| 11***75 | Control Group-Governor; -Accelerator | 1 |
| 13***50 | Plate As | 1 |
| 17***02 | Sensor Group-Position; -Accelerator Control | 1 |
162-0149 Drive Gp-Unit Inj Hyd Pump
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 2 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 10***27 | Gasket | 1 |
125-3431 Drive Gp-Unit Inj Hyd Pump
| 11***35 | Pin | 1 |
| 12***31 | Drive Group-Unit Inj Hydraulic Pump | 1 |
| 16***26 | Sensor Group-Pressure; -Atmospheric Air, Turbo Inlet | 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 |
125-3430 Drive Gp-Unit Inj Hyd Pump
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 2 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 10***27 | Gasket | 1 |
198-7912 Injector Gp-Fuel
| 11***98 | Adapter-Injection | 1 |
| 11***22 | Seal-Rectangular | 1 |
| 13***69 | Bolt-Socket Head | 2 |
232-1168 Injector Gp-Fuel
| 11***98 | Adapter-Injection | 1 |
| 11***22 | Seal-Rectangular | 1 |
| 13***69 | Bolt-Socket Head | 2 |
166-5985 Kit-Compensator
| 16***85 | Kit-Compensator | 1 |
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 |
127-7366 Lines Gp-Fuel
| 03***27 | Seal-O-Ring; (19.18mm Id) | 1 |
| 03***28 | Seal-O-Ring | 2 |
| 03***36 | Seal-O-Ring | 2 |
151-1356 Lines Gp-Fuel Filter
| 03***33 | Seal-O-Ring; (12.42mm Id) | 4 |
| 09***87 | Tee | 1 |
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 1 |
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 |
206-2630 Pump Gp-Fuel Injection
| 10***26 | Clamp-Injector | 1 |
| 11***21 | Seal-Rectangular | 2 |
| 11***08 | Elbow-Injector | 1 |
122-2513 Pump Gp-Fuel Prm & Prim Filter
| 10***08 | Pump As; (Fuel Priming) | 1 |
| 12***13 | Pump Group-Fuel Prm & Prim Filter | 1 |
| 12***57 | Base As-Filter; (Primary Fuel Filter) | 1 |
225-0567 Pump Gp-Unit Injector Hyd
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 13***52 | Seal-O-Ring | 1 |
| 13***09 | Fitting | 2 |
134-1598 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***63 | Pump Group-Fuel Transfer | 1 |
201-4201 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 |
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 |
144-0835 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***20 | Coupling | 1 |
134-9405 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***63 | Pump Group-Fuel Transfer | 1 |
225-0568 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 |
125-3225 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***63 | Pump Group-Fuel Transfer | 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 |
133-1708 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***63 | Pump Group-Fuel Transfer | 1 |
201-4202 Pump Gp-Unit Injector Hyd
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 13***52 | Seal-O-Ring | 1 |
| 13***09 | Fitting | 2 |
169-1034 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***20 | Coupling | 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 |
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 |
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 |
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
142-5649 Lines Gp-Hydraulic Oil Cooler
| 00***89 | Valve As-Drain | 2 |
| 14***49 | Lines Group-Hydraulic Oil Cooler | 1 |
| 1L***79 | Elbow-Pipe; (3/8 In Pipe) | 2 |
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 |
122-5846 Filler Gp-Engine Oil
| 12***46 | Filler Group-Engine Oil | 1 |
| 12***48 | Tube As-Oil Filler | 1 |
| 12***49 | Bracket-Oil Filler | 1 |
4n-2357 Filter Gp-Engine Oil
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 1R***08 | Filter As-Engine Oil; (Advanced Efficiency)(High Efficiency) | 2 |
| 2P***03 | Base As-Oil Filter; (Engine) | 2 |
136-7608 Fumes Disposal Gp
| 12***29 | Tube | 1 |
| 12***47 | Tube As | 1 |
| 13***74 | Clip-Loop | 2 |
122-2523 Gauge Gp-Oil Level (Dipstick) -Engine
| 10***59 | Spacer; (9x20x39.2-mm Thk) | 1 |
| 11***68 | Seal-O-Ring; (15.54mm Id) | 1 |
| 12***14 | Bracket As | 1 |
122-1790 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 |
129-6833 Lines Gp-Turbocharger Oil
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 6 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 11***26 | Tube As-Drain | 1 |
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 |
Machine Arrangement
304-6927 Conversion Ar-Machine
| 21***34 | Engine Ar | 1 |
| 30***27 | Conversion Ar-Machine | 1 |
| 32***21 | Conversion Group-Electrical | 1 |
Operator Station
142-5647 Valve Gp-Shutoff -Cab Heater
| 14***47 | Valve Group-Shutoff; -Cab Heater-Engine To Cab Heater | 1 |
| 3N***90 | Plate Serial Number; On R.H. Rear Bank Of Cylinder Block As Viewed From Rear Of Engine | 1 |
Service Equipment And Supplies
142-9921 Plate & Film Gp
| 14***21 | Plate & Film Group | 1 |
772B serial number reference
The PIN plate sits on the tractor frame near the front, driver's side, below the cab, with the PIN often also stamped directly into the frame rail as a tamper check; some units repeat it on a certification plate inside the cab. Read the first 3 characters as the serial prefix (model and assembly plant) and the digits after it as the build sequence number. On later 17-character PINs, the model/prefix data sits in the first 8 characters and the serial number is the last 8 characters.
| Prefix | Identifies | Notes |
|---|---|---|
| 64W | 772B off-highway tractor (768C/772B/776C tractor-wagon family) | Prefix covers 64W1 and up, the full production run for the 772B. The 772B is a tractor that tows a separate bottom-dump wagon through a frame-mounted, yoke-type hitch; it is not a rigid-frame dump truck. It shares parts/service manuals with related contemporary models (768C, 769C, 773B, 771C), which are separate machines, not body variants of the 772B. The 772B itself runs a Cat 3412 V-12 diesel per the factory Specalog for this tractor family; the smaller 768C in the same family uses a Cat 3408 V-8. |
Frequently asked questions
What engine does the Caterpillar 772B use?
The 772B off-highway tractor uses a Caterpillar 3412, a mechanically governed, turbocharged and aftercooled V12 diesel of about 27.0 L (1,649 cu in) displacement, rated near 509 kW (682 hp) gross power at 2000 rpm. This is not the modern C18 ACERT engine used in the unrelated, number-reused rigid-frame 772/772G haul truck.
What is the operating weight of the Caterpillar 772B?
Empty, the 772B tractor weighs about 32.9 t (72,550 lb) with 10 percent fuel. Coupled to its bottom-dump wagon, the hitch is rated for a maximum load near 51.8 t (114,000 lb); total combination weight varies by the wagon model and payload carried.
What was the Caterpillar 772B grouped with, or what replaced it?
Caterpillar marketed the 772B alongside the smaller 768C (Cat 3408 V8) and larger 776C (Cat 3508 V8) as its 768C/772B/776C Off-Highway Tractor line, all sold as prime movers for separate bottom-dump wagons. The tractor-wagon concept was discontinued as Caterpillar's hauling lineup shifted toward rigid-frame trucks; today's number-reused "772" nameplate refers to an unrelated modern rigid dump truck, not a direct successor to this tractor.
What 772B owners discuss
What's the main wear point on the tractor-to-wagon coupling, and what should I watch for?
The yoke-type hitch that couples this tractor to its bottom-dump wagon oscillates in four directions to absorb frame stress on rough haul roads, with turn stops built in to limit wagon rotation. That constant articulation is what wears the coupling pins and bushings over time. Watch for play at the hitch under load, a knock when backing under the wagon, and uneven tire wear on either unit, which often traces back to slack in the coupling rather than alignment. Keep it greased on the OEM interval, not a stretched one. Have your dealer verify pin and bushing tolerances before slack there turns into frame damage.
Why does oil consumption creep up on the 3408 and 3412 diesels at high hours?
Across this engine family, rising oil consumption and blue smoke on startup or under load usually trace to worn piston rings, tired valve seals, or liner wear, not one single culprit. It is common enough that owners chasing it after a first ring job sometimes find consumption creeping back within a few thousand hours because the liners were never checked. Track oil top-up against operating hours rather than judging by exhaust color alone, and inspect liner condition at the same time as rings on any rebuild.
Are there known quirks with the mechanical injection pump and governor on these engines?
The mechanical injection pumps on the 3408/3412 family are simple and generally reliable, but a machine parked for a season can come back with a stuck pump rack that needs freeing before the engine will idle down or shut off cleanly. Governor linkage and fuel-setting screws also drift out of adjustment with age, showing up as rough idle or sluggish throttle response. On pumps with the older-style plunger assemblies, the top seal can harden and start weeping fuel even at modest hours. None of it is exotic work for a shop that knows mechanical Cat diesels, but sourcing parts for the earliest pump versions is getting harder as the fleet ages. Have your dealer verify governor and pump adjustment before returning the machine to full duty.
What turbo and aftercooler issues come up on the 3412 V12?
Running twin turbochargers on the V12 means twice the wear items to track compared with a single-turbo engine, so a failing unit on one bank can go unnoticed longer. Check shaft play and look for oil migrating into the compressor housing at every service interval. Aftercooler cores also foul and corrode internally over the years, and the resulting power loss is gradual enough that operators often suspect the engine itself before checking the cooler. A pressure or flow test on the aftercooler catches a plugged core before someone chases a healthy engine for lost power.
There's no engine computer on this machine. What electrical or charging problems should I expect?
Without an ECM to flag anything, charging problems on this era of mechanical Cat diesel show up the old-fashioned way: dim lights, a battery that won't hold overnight, or a no-start after sitting. These charging systems need the engine up around fast idle before alternator output comes up fully, so a battery that looks weak right off low idle is not automatically bad. In practice, corroded battery terminals and grounds cause more no-charge complaints than actual alternator failure. Checking voltage at the battery directly, rather than trusting the gauge, catches a fading alternator before it stalls a shift.
What should I check before buying a used 772B?
Because this tractor is discontinued and fairly scarce today, a buyer's walk-around should go past the usual leaks-and-tires check. Confirm the wagon coupling and hitch pins show minimal play, pull an oil sample or run a compression/blow-by check on all cylinders rather than trusting a smoke-free idle, and ask directly about injection pump history since a recently serviced pump is worth more than a logbook entry claiming it. This tractor shares some driveline components with other machines in the same off-highway tractor lineup, which helps parts availability, but confirm the seller's parts sourcing plan before counting on quick support. Have your dealer verify engine and drivetrain condition with a full inspection before finalizing any offer.
What's the overall reputation of this tractor family and its 3408/3412 power among people who have run them?
Across the 768C/772B/776C tractor family, the consensus among people who have wrenched on or operated the mechanical 3408/3412 power is that these are simple, rebuildable machines without electronics to chase down. Most complaints center on wear items reaching end of life together at high hours, rings, turbos, injection pumps, and hitch bushings, rather than any single design flaw. The tradeoff for that mechanical simplicity is an aging and increasingly scarce parts supply now that Cat has long since moved this class of equipment to electronically controlled successors.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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