Caterpillaroff-highway trucktruck
Caterpillar 773B
Maintenance schedule, common problems & OEM parts breakdown
The Cat 773B is a rigid, non-articulated off-highway haul truck in Caterpillar's 50-ton class, built from 1987 to 1996. It is powered by the Caterpillar 3412, a mechanically governed V12 diesel, turbocharged and aftercooled, rated at roughly 485 kW (650 hp) net at 2000 rpm; this is the earlier mechanical 3412, not the electronic 3412E fitted to later 773D/E/F trucks. Empty operating weight runs about 39,400 kg (86,850 lb), with a rated payload near 54 t (119,000 lb). Drivetrain is a seven-speed planetary powershift transmission with a torque converter, driving oil-cooled multiple-disc rear brakes and dry disc front brakes, on hydro-pneumatic strut suspension with single rear tires. Caterpillar sold the 773B mainly as a standard dump-body rock and quarry hauler; body liners, tire and rim choices, and options varied by mine or quarry application, but the chassis, engine, and drivetrain architecture stayed consistent across the production run. It sits in the broader 773 lineage, following the original 773 and preceding the 773D, 773E, and 773F.
Across its production run Caterpillar refined the mechanical 3412's injection calibration and transmission clutch materials, but the basic architecture never changed: there is no factory engine or transmission electronics on this generation, unlike the pressure-modulated transmissions and electronic engines that followed. The line moved forward with the 773D in 1996, which brought updated ratings and a revised transmission; the 773B does not have one single confirmed direct successor beyond that generational handoff. In today's used and parts market, the 773B endures as a mechanically simple production-support truck: no ECM, no flash codes, and a service routine any diesel tech can diagnose with gauges and oil analysis rather than a laptop. Demand centers on the mechanical 3412 top end, the powershift transmission and torque converter, wheel-end final drives, suspension cylinders, and brake packs, components common enough across Caterpillar's truck line of that era that parts and rebuild support remain workable despite the machine's age.
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 773B specifications
Engine
| Engine model | Cat 3412, V12 diesel, 65-degree V-block, turbocharged and aftercooled |
| Net power | 485 kW (650 hp) at 2000 rpm |
| Gross power | 509 kW (683 hp) at 2000 rpm |
| Displacement | 27 L (1648 cu in) |
| Cylinders | 12 (V12) |
| Emissions tier | Built 1987-1996; predates EPA/EU off-road emissions tier standards, no formal tier rating applies |
Weights
| Operating (empty) weight | 39,396 kg (86,853 lb) |
| Gross (loaded) weight | 92,534 kg (204,003 lb) |
| Rated payload | 53,977 kg (119,000 lb), approx. 54 tonnes |
| Ground pressure | Not published for this model |
Dimensions
| Overall length | 9.27 m (30 ft 5 in) |
| Overall width | 4.70 m (15 ft 5 in) |
| Overall height | 4.23 m (13 ft 11 in) |
| Wheelbase | 4.19 m (13 ft 9 in) |
| Ground clearance | 591 mm (1 ft 11 in) |
| Body dump (raised) height | 8.66 m (28 ft 5 in) |
| Tires | 24.00-35 standard fitment; some spec sheets list 21.00-35 for this truck range - varies by configuration/series, confirm against the specific unit rim and axle spec |
Performance
| Maximum travel speed | 57.3 km/h (35.7 mph) |
| Transmission | Powershift, 7 forward / 1 reverse |
| Dump angle | 54.5 degrees |
| Body raise time | 11.4 sec |
| Body lower time | 14.2 sec |
| Heaped body capacity | 34.1 m3 (44.6 yd3) |
| Struck body capacity | 26 m3 (34.0 yd3) |
| Gradeability / drawbar pull | Not published in available spec sheets for this model |
Service capacities (summary)
| Fuel tank | 700 L (185 gal) |
| Cooling system | 151 L (39.9 gal) |
| Engine oil | 68 L (18 gal) |
| Differential and final drive | 155 L (41 gal) |
| Steering/hydraulic system | 81 L (21.4 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
773B fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 68 L (18 US gal) | Cat DEO (Diesel Engine Oil) for the 3412 diesel. SAE 15W-40 for most ambient temperatures; SAE 10W-30 in colder climates per Cat's viscosity-by-temperature guidance. |
| Cooling system | 151 L (40 US gal) | Cat DEAC (Diesel Engine Antifreeze/Coolant), mixed 50/50 with clean water for standard freeze protection (adjust ratio for colder climates). Use distilled or deionized water for the mix. Cat ELC (Extended Life Coolant) is accepted as a later OAT alternative. |
| Fuel tank | 700 L (185 US gal) | No. 2-D diesel fuel meeting Cat's fuel specification. Use a winter-blend fuel or cold-flow conditioner in cold climates to prevent gelling/wax formation. |
| Power train (transmission, torque converter, differential & final drives) | 155 L (41 US gal) combined. Available specification data does not break out a standalone transmission-only fill separate from the differential/final-drive total; treat as one combined power-train system and confirm split against the OMM for your serial range. | Cat TDTO (Transmission/Drive Train Oil). SAE 10W for cold ambient conditions, SAE 30 for temperate conditions (0 to 35 C / 32 to 95 F), SAE 50 for hot climates. |
| Hydraulic system (steering) tank | 81 L (21.4 US gal). A separate figure for the hoist/brake-cooling hydraulic circuit could not be corroborated; verify against the OMM if this truck's hydraulic tanks are split by function. | Cat TDTO or Cat HYDO per the OMM hydraulic-oil chart. Grade follows ambient temperature, generally matched to the power-train TDTO grade to standardize job-site fluids. |
| Grease (chassis/pin lubrication points) | Not a reservoir fill; applied per grease point at scheduled intervals. | Cat MPGM (Multipurpose Grease with Moly), NLGI 2. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 773B maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the 773B beyond the schedule
Predictive Maintenance & Fluid Analysis
Run S.O.S oil sampling on the mechanical 3412, powershift transmission, torque converter, differentials and final drives, and hydraulic tank at every scheduled service. Because the 3412 has no ECM, there is no fault-code history to lean on; wear-metal trending and oil condition are the main early warning for injector, liner, or bearing wear. Watch coolant condition for corrosion-inhibitor depletion, a known risk on wet-liner 3412 blocks left unchecked between changes.
Corrective & Common Repairs
Typical 773B corrective work centers on the mechanical unit fuel pump and injectors, turbocharger shaft wear, powershift clutch pack slippage, and torque converter stator one-way clutch failure. On the chassis, expect dry front brake disc wear, oil-cooled rear brake pack overheating under sustained grade use, and suspension cylinder seal leaks from hydro-pneumatic strut cycling. Steering and hoist pilot valves are common leak points; seal work resolves most drift complaints before a pump or cylinder replacement is needed.
Overhaul & Rebuild Points
Plan an in-frame or top-end 3412 overhaul around S.O.S wear-metal trends and blow-by rather than a fixed hour number, since these mechanical engines vary widely with duty cycle and altitude. The powershift transmission and torque converter are commonly rebuilt as a unit once clutch-pack wear trends up. Final drives, wheel bearings, and suspension cylinders are the other major wear-out components; hoist and steering cylinder rod chrome and seals should be inspected at every major teardown given the truck's cycle-loaded duty.
Seasonal & Environment Servicing
In cold climates, use correct-viscosity engine and drive-train oils and confirm coolant freeze protection before winter; the mechanical 3412's fuel system needs a cold-weather blend to avoid gelling since there is no electronic fuel heater management. In hot, dusty pit or quarry sites, shorten air filter and radiator core cleaning intervals and check the fuel-water separator more often, since fine dust and moisture load up faster than the standard schedule assumes.
773B 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.
773B fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Coolant Temperature Warning Lamp (red) | Engine coolant temperature has risen above the safe operating range. | Low coolant level, a plugged or fouled radiator core, a failed water pump, a stuck thermostat, or lugging the engine under load on a grade. | Reduce load and idle the engine in a safe spot, let it cool, then check coolant level and inspect the radiator core and fan drive before returning to work. |
| Engine Oil Pressure Warning Lamp (red) | Engine oil pressure has dropped below the safe minimum. | Low oil level, a clogged oil filter, a worn oil pump, or a faulty pressure sender/switch. | Shut the engine down right away, check oil level and filter condition, and check the sender wiring before restarting. |
| Brake Oil Temperature Warning Lamp / Gauge | Oil-cooled disc brake system oil has overheated. | Riding the service brakes on a long grade instead of retarding with the engine/transmission, low brake oil level, or a restricted brake oil cooler. | Reduce speed and use engine braking on descents, then check brake oil level and cooler once stopped. |
| Torque Converter Oil Temperature Warning Lamp / Gauge | Power train (torque converter) oil temperature is above normal. | Converter stall from lugging in too high a gear or overloading, low transmission oil level, or a plugged oil cooler. | Downshift and reduce load, check transmission oil level, and inspect the oil cooler for restriction. |
| Power Train Oil Filter Bypass Lamp | The transmission/torque converter oil filter has gone into bypass from restriction, sending unfiltered oil into the power train. | Overdue filter change or contaminated power train oil. | Stop and change the power train filter, and check oil condition before continuing to operate. |
| Charging System Warning Lamp (alternator) | Alternator charging voltage is below normal. | A worn or slipping alternator belt, a failing alternator, or a loose or corroded battery connection. | Check belt tension and battery connections, then test alternator output. |
| Parking Brake Lamp | Parking brake is applied. | Operator has the parking brake control engaged, or a parking brake switch/circuit fault is holding the indication on. | Confirm the parking brake control position before moving the truck; if the lamp stays on with the brake released, check the parking brake switch and wiring. |
| Engine Overspeed Indicator | Engine rpm exceeded the safe maximum. | Descending a grade in too high a gear without adequate retarding, or a throttle/governor linkage fault. | Select a lower gear before descending grades and use engine braking; inspect throttle and governor linkage if the indicator trips on level ground. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
773B attachments & work tools
Truck bodies
Dual Slope is the standard body design for this truck's size class, giving a low center of gravity and even load distribution; offered lined or unlined. A lighter-wall Coal body variant of the dual-slope design suits low-density material. Flat-floor and quarry-style bodies are also offered in this class where fines retention or rock handling needs a different profile. Rated body capacity for the 773B runs about 26 m3 struck / 34 m3 heaped (34/45 yd3), at roughly 53 t (approx. 119,000 lb) rated payload.
Body wear protection and add-ons
Tail extensions, sideboards, tumble bars, rock boxes and rock shedders are offered to raise retained payload and cut spillage on this body class. Steel wear liners cover most digging conditions; rubber liners suit high-impact hard-rock duty on dual-slope-style bodies. These are shop-fitted to the body, not field-swappable quick attachments.
Water truck conversion
773B chassis are a common base for water-truck rebuilds, typically fitted with a top-fill tank in the 38,000-45,000 L (10,000-12,000 US gal) range plus front and rear spray bars and a water cannon. This is a chassis rebody done by tank/body suppliers rather than a factory dump-body option, so plumbing and pump arrangement varies by builder.
Tires and wheels
Standard fitment for the 773B is 24.00-35 tires, radial or bias-ply; some parts suppliers list 21.00-35 for this general truck range, so confirm size against the specific unit's rim and axle spec before ordering - varies by configuration/series. Multi-piece steel rims are matched to the tire size fitted.
Hoist and body mounting
The dump body is raised and lowered by hydraulic hoist cylinders driven off the truck's own hydraulic system; there is no quick-attach coupler for the body the way excavator or loader work tools use. Swapping body type (dual slope to coal body or a water-tank conversion) is a shop-level structural change, not an operator-level attachment swap.
Cab and operator protection
A ROPS/FOPS-certified cab was offered as a factory option on the 773B, for sites requiring rollover and falling-object certification beyond the standard operator station.
All 773B assemblies by section
Every catalogued assembly group for the Caterpillar 773B. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
7c-4782 Air Cleaner Gp
| 10***66 | Gasket | 2 |
| 15***14 | Precleaner Group; -Air Cleaner | 2 |
| 6I***86 | Air Cleaner Group; -Rh | 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 |
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 |
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-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 |
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 |
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
| 11***66 | Gear-Crankshaft; (99-Teeth) | 1 |
| 24***18 | Kit-Crankshaft Bearing | 0 |
| 25***52 | Plate-Thrust; (Crankshaft) | 2 |
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 |
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 |
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 |
108-1887 Cylinder Head Gp
| 10***94 | Dowel | 2 |
| 10***00 | Cylinder Head As | 1 |
| 10***87 | Cylinder Head Group | 1 |
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 |
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 |
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 |
129-5255 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 |
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 |
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 |
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 |
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 |
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 |
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 |
156-7172 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 |
156-7171 Control Gp-Engine Electronic
| 15***71 | Control Group-Engine Electronic | 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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
125-3430 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 |
225-0568 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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
235-2024 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 |
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 |
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
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 |
773B serial number reference
On a 773B the PIN/serial plate is a riveted metal tag mounted on the left front frame rail, near the cab access step or fuel tank support ahead of the cab; check the frame itself if the tag is missing or repainted over. Read the first three characters as the serial prefix (model and plant code) and the remaining digits as the unit sequence number, e.g. in 63W00314 the prefix is 63W and the sequence is 00314.
| Prefix | Identifies | Notes |
|---|---|---|
| 63W | 773B Off-Highway/Rock Truck, full production run | Covers the entire 773B build, roughly 1987-1996. Engine is the Cat 3412 TA, mechanically governed, turbocharged and aftercooled, rated in the 485-509 kW (650-682 hp) at 2000 rpm range. Dump-body options (quarry, dual-slope, flat-floor) are configuration choices under this same prefix, not separate serial families. Do not confuse with the 772B truck, which shares a combined service manual but carries its own 64W prefix, or with 773 (original), 773D, 773E, 773F, which use different prefixes and engines. |
Frequently asked questions
What engine does the Caterpillar 773B use?
The 773B is powered by the Caterpillar 3412, a mechanically governed, turbocharged-and-aftercooled V12 diesel rated at roughly 485 kW (650 hp) net at 2000 rpm. This is the earlier mechanical 3412, not the electronic 3412E used on the later 773D, 773E, and 773F trucks.
What is the operating weight of the Caterpillar 773B?
Empty operating weight is about 39,400 kg (86,850 lb). Rated payload capacity is roughly 54 t (119,000 lb / about 53,977 kg), for a loaded gross weight around 93,000 kg (205,000 lb) depending on body and tire configuration.
What replaced the Caterpillar 773B?
Caterpillar moved the line to the 773D starting in 1996, which brought updated engine ratings and a revised transmission. The 773B has no single confirmed direct one-to-one successor beyond that generational handoff; the wider 773 family continued afterward through the 773D, 773E, and 773F.
What 773B owners discuss
How much fuel does a 773B actually burn on a working cut?
No single number holds across sites. Burn rate on the mechanical 3412 V12 scales directly with load factor, grade, and cycle time - a truck working a steep loaded haul under sustained pull burns well more per hour than one running flat, well-maintained pit roads. Operators size fuel budgets off Caterpillar's own performance-handbook tables matched to the actual haul profile rather than a single quoted average. Being mechanically injected (unlike the electronically controlled fuel systems on later D/E/F-series 773 trucks), it tends to run thirstier per ton hauled than newer equivalents, which is part of why many were repowered or retired once tighter-emissions successors arrived. Tank capacity is roughly 700 L (185 gal), which gives a rough ceiling for shift planning.
What are the known quirks of the 773B's 3412 engine?
The 773B runs a fully mechanical, jerk-pump-injected V12 3412, turbocharged and aftercooled - no electronic governor and no HEUI injection like the later 3412E used in D/E-series trucks. Two classic mechanical-3412 failure signs come up repeatedly: black exhaust smoke paired with a power loss usually points to injector calibration drift or a fueling/timing problem rather than a turbo fault, and coolant showing up in the oil across multiple cylinders usually means a liner seal or cavitation pinhole rather than one cracked head. Valve lash needs periodic mechanical adjustment since there is no electronic control masking it slipping out of spec over time. None of this is unique to the 773B - it is shared across the mechanical 3412 family - but it is the failure profile owners report most on this truck.
What should I know before swapping out the hydraulic pumps on a 773B?
The 773B's pump drive diverter is driven off a driveline yoke coming out the back of the left cylinder head, and it carries several gear pumps on mixed mount styles. Anyone retrofitting modern load-sensing piston pumps in place of the original Cat gear pumps needs to check input shaft length before bolting anything up - the original gear pumps use a noticeably longer input shaft than many current SAE C-flange piston pumps, and a shorter shaft can leave the spline barely engaged in the diverter. Owners who hit this had to either machine an adapter or source a pump with a matching longer shaft; a common C-flange mount alone does not guarantee a proper fit.
Where does a 773B typically show its age structurally?
Hoist cylinder mounting pins and bushings are a recurring wear point, especially on trucks that spent years in wet or abrasive material such as lime and similar aggregate work. The lower mount can corrode and seize hard enough that the pin cocks sideways in its bore and locks there for years. Removal on a seized example has needed heat, a fabricated pulling plate, and a high-tonnage hydraulic puller rather than a straightforward pull. Budget extra time and a proper puller setup any time you pull a hoist cylinder on an older, hard-worked truck, and have your dealer verify pin, bushing, and mount condition before returning the hoist to service.
What electrical problems come up on these trucks?
The 773B predates ECM-based engine control, so electrical complaints center on the charging system and instrument sending units rather than diagnostic codes. A quick field check for a suspect alternator: with the engine running, briefly disconnect the negative battery cable - if the engine keeps running smoothly, the alternator is carrying the electrical load on its own. On the gauge side, one gauge reading wrong (oil pressure, coolant temp, fuel level) points to a bad sending unit or a corroded connector at that sender before the gauge cluster itself gets blamed. Sending units and gauges have to be matched to the same resistance range or they read false even when both are technically working.
Is brake cooling oil overheating a real concern on this truck?
Yes, on any grade-heavy haul. Like other Cat rigid trucks of this era, the 773B uses oil-cooled multiple-disc brakes, and sustained retarding on a long loaded grade is the main way to overheat that oil. A plugged cooler core, dust packed into the fins, is the most common root cause reported, followed by running a grade steeper or longer than the truck's sustained-retarding rating. If a brake-oil-temperature warning comes on during a descent, stop and let it cool rather than push through. Have your dealer verify cooler condition and brake system pressures if overheating recurs.
What should I check before buying a used 773B?
Confirm tire size and condition first - most 773B trucks run 21.00-35, though some spec sheets list 24.00-R35, so verify against the actual rim and tire fitted, because replacement is one of the largest line items on a machine this size. Pull maintenance records for the mechanical fuel system: injector calibration, valve lash adjustment history, and any past liner or head coolant-in-oil repairs. Check hoist cylinder mounting pins and bushings for play or evidence of past seizure and repair, and check the brake-oil cooler for dust packing or a history of overheating. Empty operating weight runs around 39 t (86,000 lb) with roughly 53-54 t (117,000-119,000 lb) payload rating - weigh actual hours and duty cycle against that spec rather than assuming a low-hour truck was babied. A pre-purchase inspection by an independent heavy-equipment inspector is worth the cost against the size of a hydraulic cylinder or engine repair bill on a truck this age.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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