Caterpillaroff-highway trucktruck
Caterpillar 777
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 777 is a rigid-frame, mechanical-drive off-highway haul truck in the roughly 85-ton (77 t) payload class, built for open-pit mining and large quarry work. Introduced in 1974, it was powered by the Cat D348, a 29.3-liter (about 1,786-1,788 cu in) turbocharged V12 diesel rated at roughly 870 gross flywheel horsepower (649 kW), driving through a 7-speed powershift transmission with a torque converter. Empty weight ran about 122,600-124,400 lb (55.6-56.4 t) depending on configuration, with a loaded/gross weight near 294,405 lb (133.5 t). It rode on four oil-pneumatic suspension struts, with the front pair doubling as steering kingpins, and used sealed, oil-cooled disc brakes on a 24-volt electrical system with no electronic engine or transmission controls of any kind. The 777 scaled up the mechanical-drive haulage concept Caterpillar had proven on the smaller 769B and 773 trucks, and it was offered primarily as a rigid rear-dump hauler with body variants (standard, dual-slope, and flat-floor rock/coal bodies) suited to different haul-road and loading conditions. Production ran from 1974 through the mid-1980s before the model was replaced.
Caterpillar retired the D348-powered 777 in the mid-1980s in favor of the 777B, which swapped in a Cat 3508 engine and began the long-running 777B-777C-777D-777F-777G lineage; each later generation added displacement, horsepower, and payload, and eventually adopted Caterpillar's electronic engine and transmission control systems that the original 777 predates entirely. (A modern haul truck also carries a bare '777' nameplate today as the successor to the 777G, but it runs a Cat C32B engine and is an unrelated machine sharing only the model number.) In today's used and parts market, the original D348-powered 777 is valued mainly by collectors, museums, and independent quarry operators who prize its all-mechanical simplicity and lack of electronics to fail. Because the D348 engine was shared with the Cat 992/992B wheel loader and D10 dozer, factory parts for it are increasingly scarce, pushing many owners toward a Cat 3508 repower to keep surviving units running; this scarcity also keeps demand steady for used take-off components, rebuilt assemblies, and documentation from this now 40-plus-year-old design.
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 777 specifications
Engine
| Engine model | Cat D348, V12 diesel, turbocharged and aftercooled |
| Cylinders / bore x stroke | 12 cylinders (V12); bore 137 mm (5.4 in) x stroke 165 mm (6.5 in) |
| Displacement | 29.3 L (1,788 cu in) |
| Gross (flywheel) power | 870 hp (649 kW); net power not published for this era |
| Emissions | Predates formal EPA/EU nonroad emissions tiers; not applicable |
Weights
| Empty/unladen weight | Approx. 122,600–124,400 lb (55,610–56,428 kg), varies by body configuration |
| Loaded / gross machine weight | Approx. 294,405 lb (133,540 kg) |
| Rated payload | Approx. 170,000 lb / 85 US tons (77,111 kg / 77 t) |
| Ground pressure | Not published in any source consulted |
Dimensions
| Overall length | 9,800 mm (32.2 ft) |
| Overall width | Approx. 3,506–3,540 mm (11.51–11.6 ft) |
| Overall height | 4,903 mm (16.1 ft) |
| Wheelbase | 4,572 mm (15 ft) |
| Body-raised (dump) clearance | Approx. 4,140 mm (13.59 ft) |
| Tire size | 24.00-49, 42-ply rating |
Performance
| Maximum travel speed (unloaded) | Approx. 58.3–58.4 km/h (36.3 mph) |
| Top speed (loaded) | Approx. 53 km/h (33 mph); varies by source |
| Transmission | 7-speed automatic powershift (7 forward, 1 reverse) with torque converter |
| Turning circle | Approx. 88 ft (26.8 m) clearance turning circle |
Service capacities (summary)
| Fuel tank | 947 L (250 US gal) |
| Other fluid capacities | See the full fluid & lubricant chart below for engine oil, cooling, differential/final drive, steering, and hydraulic system capacities |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
777 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 71 L (18.75 US gal) | Caterpillar Diesel Engine Oil (Cat DEO), multigrade diesel engine oil suited to the turbocharged D348 V-12; Cat's climate-based viscosity guidance for this engine family calls for SAE 10W-30 in colder ambient conditions (below roughly -18°C/0°F) and SAE 15W-40 in temperate-to-hot conditions (above roughly -18°C/0°F), consistent with Cat's general diesel engine oil viscosity chart. |
| Cooling system | 288 L (76 US gal) | Caterpillar Diesel Engine Antifreeze/Coolant (Cat DEAC) - a full-strength, silicate-free ethylene-glycol antifreeze/coolant of the type Cat specified for this engine era, maintained with periodic Supplemental Coolant Additive (SCA) treatment. (Cat's current literature recommends its later Extended Life Coolant (ELC) formula, which needs no SCA top-ups, as the modern long-life alternative for machines of this vintage still in service.) |
| Fuel tank | 946 L (250 US gal) per the factory 777 spec brochure; independently listed as ~947 L (250.2 US gal) by two other spec compilations - treat as the same figure, rounding only | Diesel fuel - No. 2-D for normal ambient temperatures, No. 1-D in cold climates, per Cat's standard distillate diesel fuel specification for the D348 engine. (Not a lubricant; no branded lubricant applies.) |
| Differential and final drives (combined service refill) | 314 L (83 US gal) total - the factory spec sheet for this model gives one combined figure for the differential and both planetary final drives rather than itemizing each separately | Caterpillar Transmission/Drive Train Oil (Cat TDTO), viscosity selected by ambient temperature per Cat's TDTO chart (lighter grade such as SAE 10W in cold climates, heavier grade such as SAE 30 or SAE 50 in temperate-to-hot climates). |
| Steering system (separate hydraulic circuit, includes tank) | 108 L (28.5 US gal) system total, of which the steering tank alone holds 83 L (22 US gal) | Caterpillar TDTO/hydraulic-grade oil for the dedicated steering hydraulic circuit, graded by ambient temperature per Cat's fluid viscosity chart; the steering circuit is kept separate from the main hydraulic/brake-hoist circuit to prevent cross-contamination. |
| Hydraulic system - brake/hoist circuit (includes tank) | 409 L (108 US gal) system total, of which the hydraulic tank alone holds 242 L (64 US gal) | Caterpillar TDTO or Cat hydraulic oil (Cat HYDO), graded by ambient temperature. The factory abbreviated spec sheet for this model does not list a separate torque-converter/transmission refill figure, so the full OMM lubrication chart should be checked for the definitive per-compartment split. |
| Grease (all chassis, pin, and bearing lubrication points) | Not a filled-reservoir capacity - applied per fitting during scheduled lubrication, quantity not specified in liters | Caterpillar Multipurpose Grease (Cat MPGM), NLGI 2 lithium-complex grease, typically the molybdenum disulfide (moly)-fortified version for heavily loaded pins and bushings, per Cat's standard off-highway truck chassis lubrication recommendation. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 777 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 777 beyond the schedule
Predictive Maintenance & Fluid Analysis
With no ECM or fault codes, oil sampling is the primary early-warning tool on a 777. Track engine oil from the D348 V12 for soot and wear metals, sample the torque-converter/transmission and final drive TDTO-type oil for clutch and gear wear trends, and monitor the sealed oil-cooled disc brake oil for iron and silicon that signal pad and plate wear. Coolant analysis protects the D348's wet cylinder liners from cavitation erosion, and periodic checks of suspension-strut nitrogen pressure catch slow leaks before ride height sags.
Corrective & Common Repairs
Frequent corrective work on the 777 centers on the mechanical fuel injection pump and injectors going out of calibration, turbocharger bearing wear from decades of duty cycles, and oil-pneumatic strut seal leaks that let nitrogen bleed off and sag ride height. Sealed oil-cooled disc brake packs wear from constant loaded-descent use in pit haulage. Steering kingpin bearings (built into the front struts) and powershift clutch packs are other high-wear points, alongside 24V wiring and connector corrosion typical of machines this age.
Overhaul & Rebuild Points
Major rebuilds on a 777 usually start with the D348: liners, pistons, and valve train wear to a point where injector adjustment can no longer compensate, and with factory D348 parts growing scarce, many owners repower to a Cat 3508 instead. Other rebuild points include the powershift transmission clutch packs and torque converter, final drive planetaries, suspension strut reseals, and disc brake pack overhauls -- plus structural inspection of frame rails and hoist mounts, since most surviving units are well past 40 years old.
Seasonal & Environment Servicing
Cold climates demand attention to D348 starting aids, coolant protection, and 24V battery capacity, since the mechanical injection system has no electronic cold-start assist. Hot, dusty pit environments call for more frequent air cleaner and radiator core cleaning to protect the turbocharged V12 from heat soak, plus closer monitoring of sealed oil-cooled disc brake temperatures on steep, loaded descents. Suspension strut nitrogen charge should be rechecked seasonally, since pressure needs shift with ambient temperature swings.
777 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 5D-5957 | Seal-O-Ring | Fuel system service | Check fitment → |
| 255-2282 | Switch As-Pressure | Fuel system service | Check fitment → |
| 1R-0755 | Filter As-Fuel | Fuel system service | Check fitment → |
| 275-2604 | Filter As-Engine Oil | Lubrication service | Check fitment → |
| 2P-4005 | 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.
777 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| No factory alphanumeric code — red ENGINE OIL PRESSURE lamp | Engine lubrication oil pressure has dropped below the mechanical safe-operating threshold sensed by a pressure-actuated switch/sender, illuminating a dash warning lamp | Low oil level, plugged oil filter, worn oil pump, or a failed pressure switch/sender | Stop and idle the engine immediately, check oil level and filter condition, and verify pressure with a mechanical test gauge before continuing operation |
| No factory alphanumeric code — red COOLANT/WATER TEMPERATURE lamp or gauge in red zone | Engine coolant temperature has exceeded the safe limit, sensed by a thermal switch or shown by the gauge needle entering the red zone | Low coolant level, fan drive/belt failure, radiator blockage, or water pump issue | Reduce load, idle the engine, check coolant level and fan drive; do not shut down a hot engine abruptly |
| No factory alphanumeric code — TORQUE CONVERTER OIL TEMPERATURE gauge in red zone | Torque converter oil temperature has risen into the gauge's warning range | Sustained lugging in too high a gear, low torque converter oil level, or worn converter/transmission clutch packs | Downshift or reduce load, check torque converter oil level, and allow the unit to cool before continuing |
| No factory alphanumeric code — LOW AIR PRESSURE warning lamp/buzzer | Air-system pressure supplying brake actuation has fallen below the safe operating minimum | Air compressor malfunction, air leak in lines or tanks, or moisture/ice blockage | Do not move the truck; keep the engine running to rebuild air pressure and inspect lines, tanks, and compressor before operating |
| No factory alphanumeric code — ammeter/charging system indicator | Alternator or generator is not charging the battery circuit correctly | Failed alternator/generator, broken or slipping drive belt, or wiring/connection fault | Check belt tension and condition, inspect wiring and battery connections, and test alternator output |
| No factory alphanumeric code — PARKING BRAKE indicator lamp | Parking brake is applied, or is not fully releasing when commanded | Brake control left engaged, insufficient release pressure, or a sticking brake-release mechanism | Confirm brake control position, verify system pressure supply, and inspect the brake release mechanism if the lamp stays on after release is commanded |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
777 attachments & work tools
Dump body configurations
Offered as a rigid rear-dump hauler with standard, dual-slope, and flat-floor rock/coal body variants suited to different haul-road and loading conditions, per period Caterpillar literature.
Suspension & steering
Four oil-pneumatic (nitrogen-over-oil) suspension struts, with the front pair doubling as the steering kingpins — a novel arrangement for the class that gave the truck a tight clearance turning circle of about 88 ft (26.8 m).
Braking system
Sealed, oil-cooled disc brakes designed to resist fade under continuous loaded-descent duty typical of open-pit mining and quarry haul roads.
Tires
Ran on 24.00-49, 42-ply rated tires sized for the truck's 85-ton payload class.
All 777 assemblies by section
Every catalogued assembly group for the Caterpillar 777. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
108-1581 Aftercooler Gp-Treated Water
| 10***58 | Seal; (Aftercooler) | 2 |
| 10***81 | Aftercooler Group-Treated Water | 1 |
| 11***59 | Core As-Aftercooler | 1 |
322-9021 Conversion Gp-Air Inlet & Exh
| 12***51 | Tube As; (R.H.) | 1 |
| 12***52 | Tube As; (L.H.) | 1 |
| 24***63 | Tube As | 1 |
123-6921 Lines Gp-Air
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 6 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 4 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 18 |
121-5731 Manifold Gp-Exhaust
| 10***19 | Sleeve-Exhaust Manifold | 2 |
| 11***71 | Manifold-Exhaust; (Rear, Rh) | 1 |
| 11***72 | Manifold-Exhaust; (Rear, Lh) | 1 |
133-5951 Shield Gp-Manifold
| 12***41 | Shield As-Manifold | 1 |
| 13***51 | Shield Group-Manifold | 1 |
| 13***52 | Strap As | 1 |
127-4474 Turbocharger Gp
| 12***36 | Gasket; (Turbocharger) | 2 |
| 12***14 | Coupling-Exhaust | 2 |
| 12***74 | Turbocharger Group | 1 |
126-1085 Turbocharger Gp
| 12***92 | Cover-Compressor | 1 |
| 12***85 | Turbocharger Group | 1 |
| 12***57 | Housing | 1 |
239-5045 Turbocharger Gp
| 23***46 | Housing | 1 |
| 23***45 | Turbocharger Group | 1 |
| 23***46 | Cartridge Group-Turbocharger | 1 |
172-0913 Turbocharger Gp
| 12***92 | Cover-Compressor | 1 |
| 12***57 | Housing | 1 |
| 17***42 | Cartridge Group-Turbocharger | 1 |
Basic Engine
8n-9794 Belt Tensioner Gp
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
1n-3331 Support Gp-Engine
| 1B***09 | Bolt-- Head To Cylinder Block | 8 |
| 1N***31 | Support Group-Engine; -Front | 1 |
| 2J***06 | Nut Front Support To Frame; Nut-Front Support To Frame | 4 |
160-9845 Air Compressor Gp
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 6 |
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 8 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 6 |
110-2751 Air Compressor Gp
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 6 |
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 8 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 6 |
113-8193 Air Compressor Gp
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 3 |
| 11***51 | Air Compressor Group | 1 |
| 11***93 | Air Compressor Group | 1 |
101-0833 Balancer Gp -Front
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 10***33 | Balancer Group; -Front | 1 |
| 10***65 | Plate-Thrust | 1 |
120-7413 Base Gp-Valve Cover
| 11***38 | Spacer; (17.5x30.94x98-mm) | 1 |
| 11***39 | Spacer; (17.5x30.94x98-mm) | 1 |
| 12***39 | Washer-Spring | 1 |
247-8341 Base Gp-Valve Cover -Rocker Arm
| 11***38 | Spacer; (17.5x30.94x98-mm) | 1 |
| 11***39 | Spacer; (17.5x30.94x98-mm) | 1 |
| 12***39 | Washer-Spring | 1 |
106-4582 Camshaft Gp
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 10***82 | Camshaft Group | 1 |
| 11***08 | Plate | 2 |
119-6288 Cover Gp-Cylinder Block -Central Structure
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 9 |
| 11***88 | Cover Group-Cylinder Block; -Central Structure | 1 |
186-4176 Cover Gp-Flywheel Housing
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 39 |
| 0T***55 | Bolt; (3/8-16x4.25-In)(Location S) | 1 |
119-6350 Cover Gp-Front Housing
| 03***42 | Seal-O-Ring; (11.89mm Id) | 1 |
| 10***85 | Cover As | 1 |
| 11***50 | Cover Group-Front Housing | 1 |
101-0831 Cover Gp-Valve Mechanism
| 10***31 | Cover Group-Valve Mechanism | 1 |
| 10***97 | Cover | 1 |
| 1A***79 | Capscrew (5/16 - 18 Nc X 1 1/2 Gd5, Hex) | 4 |
241-0222 Crankshaft Gp
| 12***45 | Bolt As; (5/8-18x4.25-In)(Counterweight) | 18 |
| 14***31 | Bearing As-Main; (Standard) | 5 |
| 14***32 | Bearing-Main; (0.63-mm Us Id) | 0 |
101-0336 Crankshaft Gp
| 10***36 | Crankshaft Group | 1 |
| 12***45 | Bolt As; (5/8-18x4.25-In)(Counterweight) | 18 |
| 14***31 | Bearing As-Main; (Standard) | 5 |
101-1171 Cylinder Block As
| 10***71 | Cylinder Block As | 1 |
| 21***26 | Liner-Cylinder Block | 8 |
| 22***96 | Cap-Crankshaft Bearing | 5 |
237-7957 Cylinder Block Gp
| 0S***95 | Bolt 1.25 In. (31.75 mm) Long Guard Assemblies To Radiator Guard | 2 |
| 10***71 | Cylinder Block As | 1 |
| 10***98 | Bearing-Camshaft | 10 |
155-5274 Cylinder Head As
| 13***23 | Cylinder Head As | 1 |
| 13***06 | Guide-Valve; (Standard)(Intake) | 4 |
| 14***82 | Guide-Valve; (0.508mm Os Od)(Exhaust) | 0 |
242-5328 Cylinder Head As
| 13***06 | Guide-Valve; (Standard)(Intake) | 2 |
| 14***82 | Guide-Valve; (0.508mm Os Od)(Exhaust) | 0 |
| 19***95 | Guide-Valve; (Standard)(Exhaust) | 2 |
154-1612 Cylinder Head As
| 13***07 | Insert-Valve Seat; (Standard)(Intake) | 2 |
| 13***08 | Insert-Valve Seat; (Standard)(Exhaust) | 2 |
| 14***81 | Insert-Valve Seat; (0.51-mm Os Od)(Intake) | 0 |
101-1175 Cylinder Head As
| 10***75 | Cylinder Head As | 1 |
| 11***91 | Insert-Valve Seat; (Exhaust) | 2 |
| 14***45 | Insert-Valve Seat; (0.508-mm Os Od)(Inlet) | 0 |
131-4338 Cylinder Head As
| 13***13 | Guide-Valve; (Standard) | 4 |
| 13***23 | Cylinder Head As | 1 |
| 13***38 | Cylinder Head As | 1 |
131-0423 Cylinder Head As
| 13***23 | Cylinder Head As | 1 |
| 13***40 | Insert-Valve Seat; (Standard)(Exhaust) | 2 |
| 13***30 | Insert-Valve Seat; (Standard)(Inlet) | 2 |
101-0830 Cylinder Head Gp
| 10***30 | Cylinder Head Group | 1 |
| 11***91 | Gasket-Cylinder Head | 1 |
| 13***20 | Fastener Group-Cylinder Head | 6 |
317-2440 Cylinder Head Gp
| 13***06 | Guide-Valve; (Standard)(Intake) | 2 |
| 14***82 | Guide-Valve; (0.508mm Os Od)(Exhaust) | 0 |
| 15***12 | Cylinder Head As | 1 |
101-1174 Cylinder Head Gp
| 10***74 | Cylinder Head Group | 1 |
| 10***75 | Cylinder Head As | 1 |
| 10***77 | Spring-Valve; (Inner) | 4 |
201-4257 Cylinder Head Gp
| 13***06 | Guide-Valve; (Standard)(Intake) | 2 |
| 14***82 | Guide-Valve; (0.508mm Os Od)(Exhaust) | 0 |
| 15***12 | Cylinder Head As | 1 |
155-5273 Cylinder Head Gp
| 10***77 | Spring-Valve; (Inner) | 4 |
| 10***80 | Spring-Valve; (Outer) | 4 |
| 12***39 | Valve-Exhaust | 2 |
145-3216 Cylinder Head Gp
| 10***77 | Spring-Valve; (Inner) | 4 |
| 10***80 | Spring-Valve; (Outer) | 4 |
| 13***06 | Guide-Valve; (Standard)(Intake) | 4 |
8n-7182 Damper Gp
| 19***88 | Damper As | 1 |
| 2M***49 | Washer-Retainer To Fan Bracket Assembly | 10 |
| 5P***50 | Washer-Front Support Frame Assembly To | 6 |
7n-3978 Drive Gp-Accessory
| 10***21 | Seal; (Dirt) | 1 |
| 10***22 | Seal-Lip Type | 1 |
| 13***98 | Bearing-Sleeve | 1 |
107-7361 Drive Gp-Accessory -Upper, Rh
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 6 |
| 10***66 | Gear-Accessory Drive; (55-Teeth) | 1 |
115-0597 Drive Gp-Auxiliary
| 0T***55 | Bolt; (3/8-16x4.25-In)(Location S) | 1 |
| 10***79 | Adapter As | 1 |
| 10***76 | Shaft As-Pump Drive | 1 |
122-3222 Drive Gp-Fan
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 6 |
| 12***22 | Drive Group-Fan | 1 |
9y-7669 Flywheel Gp
| 5P***39 | Washer-Hard; (28x42x4-mm Thk) | 12 |
| 8N***96 | Gear (151 Teeth) | 1 |
| 9S***93 | Bolt-12 Point Head; (1-14x101.6-mm) | 12 |
8n-7174 Gear Gp-Front -Standard Rotation
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 5 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
| 0T***55 | Bolt; (3/8-16x4.25-In)(Location S) | 1 |
101-1361 Gear Gp-Rear
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 10***61 | Gear Group-Rear | 1 |
| 10***64 | Gear As-Idler; (69-Teeth)(Camshaft) | 2 |
4n-9680 Governor Gp-Air Compressor
| 2K***98 | Seal-O-Ring | 1 |
| 2S***23 | Cover As; (Governor) | 1 |
| 4N***80 | Governor Group-Air Compressor | 1 |
4p-3747 Guard Gp-Belt -Alternator
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 16***11 | Guard As; (Alternator) | 1 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 2 |
317-7596 Housing Gp-Flywheel
| 0S***95 | Bolt 1.25 In. (31.75 mm) Long Guard Assemblies To Radiator Guard | 1 |
| 10***67 | Adapter | 1 |
| 1D***74 | Bolt (L.H. Side Flywheel Housing) | 7 |
4p-5426 Housing Gp-Front -Accessory Drive
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
| 10***34 | Housing-Accessory Drive | 1 |
| 1B***18 | Washer; (25/64 X 5/8 X .064in Thk) | 6 |
7e-6872 Lifting Gp-Engine
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 4 |
| 15***26 | Bracket As | 2 |
| 19***86 | Retainer-Eye; (Rear) | 1 |
119-6321 Lines Gp-Air Compressor
| 03***69 | Elbow-Flared; (1/2-14 Nptf) | 5 |
| 06***17 | Elbow-Flared | 1 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 1 |
7e-4836 Mounting Gp-Alternator
| 05***65 | Sleeve | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 14***16 | Belt-Serpentine; (Alternator) | 1 |
123-7000 Pan Gp-Oil -Engine
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 10 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 7 |
223-6363 Piston & Rod Gp
| 0T***02 | Bolt; (3/8-16x0.625-In)(Shield To Head) | 1 |
| 10***30 | Bearing-Connecting Rod; (Standard) | 1 |
| 10***31 | Bearing-Connecting Rod; (0.63-mm Us Id) | 0 |
281-6139 Piston & Rod Gp
| 0T***02 | Bolt; (3/8-16x0.625-In)(Shield To Head) | 1 |
| 10***30 | Bearing-Connecting Rod; (Standard) | 1 |
| 10***31 | Bearing-Connecting Rod; (0.63-mm Us Id) | 0 |
122-3219 Pulley Gp-Crankshaft
| 12***19 | Pulley Group-Crankshaft | 1 |
| 22***06 | Pulley-Crankshaft; (6-Groove) | 1 |
| 4W***35 | Kit-Bushing; (Crankshaft Pulley) | 1 |
103-0880 Pulley Gp-Idler
| 10***80 | Pulley Group-Idler | 1 |
| 10***81 | Cap-Dust | 1 |
| 10***82 | Cap-Dust | 1 |
7w-3813 Seal Gp-Crankshaft
| 6I***09 | Seal Group-Crankshaft; (Cw Rotation) | 1 |
| 6I***10 | Seal Group-Crankshaft; (Ccw Rotation) | 1 |
| 7W***13 | Seal Group-Crankshaft | 1 |
7n-1863 Trunnion Gp-Engine
| 1D***66 | Bolt Bracket Assembly To Yoke | 20 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 20 |
| 5P***46 | Washer-Hard; (15.5x29x3-mm Thk) | 16 |
1w-0422 V-Belt Set -Includes 4-Belts, Fan Drive
| 1W***22 | V-Belt Set; -Includes 4-Belts, Fan Drive-Fan Drive | 1 |
224-9869 Valve Mechanism Gp
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***15 | Bolt 19 mm (.75 In.) Long Return Air Console To Enclosed Rops | 1 |
| 10***77 | Retainer-Spring | 1 |
Braking System
9t-7204 Cylinder Gp-Air
| 2K***91 | Ring-Retaining | 1 |
| 5P***47 | Seal-Lip; (25.48 mm Od) | 1 |
| 6E***57 | Kit-Seal; (Hydraulic Cooling) | 1 |
Cooling System
2w-6571 Cooler Gp-Engine Oil
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 1 |
| 10***32 | Seal-O-Ring | 2 |
| 12***42 | Core As-Oil Cooler; (Engine) | 1 |
4w-5056 Core Gp-Oil Cooler -Transmission
| 4W***56 | Core Group-Oil Cooler; -Transmission | 1 |
| 6V***49 | Seal-O-Ring (Id=11.89mm); (11.89-mm Id) | 1 |
| 9S***91 | Plug,Machine Thread Fuel Injection Pump | 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 |
200-5975 Core Gp-Oil Cooler -Front, Rear Brake
| 20***75 | Core Group-Oil Cooler; -Front, Rear Brake-Torque Converter, Hoist, Brake | 1 |
| 8T***64 | Plug-Pipe; (1/8-27-Thd)(Cylinder Head) | 2 |
4w-5409 Core Gp-Oil Cooler
| 4W***09 | Core Group-Oil Cooler | 1 |
| 8L***86 | Seal-O-Ring (Id=16.36mm); (16.36-mm Id) | 1 |
| 9S***85 | Plug--To Seal Hydraulic Pump To Sump Of Limit System | 1 |
2w-0163 Fan Gp-Suction
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 8 |
| 1F***50 | Nut Rops Support | 2 |
| 2W***63 | Fan Group-Suction | 1 |
123-6917 Lines Gp-Water
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 0S***95 | Bolt 1.25 In. (31.75 mm) Long Guard Assemblies To Radiator Guard | 6 |
7w-0486 Lines Gp-Water -Bypass
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 9 |
4w-6169 Lines Gp-Water -Lower
| 00***89 | Valve As-Drain | 2 |
| 03***67 | Connector-Flared -- Adapter To Hose As. | 1 |
| 03***68 | Elbow (For Use With Shallow Pan) | 1 |
117-0065 Lines Gp-Water -Aftercooler
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 8 |
7e-9218 Lines Gp-Water -Upper
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 24 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 30 |
| 12***56 | Gasket | 2 |
7w-4074 Radiator Gp
| 16***86 | Seal-End Tank; (Narrow End) | 23 |
| 16***87 | Seal-End Tank; (Wide End) | 23 |
| 18***16 | Tube As | 1 |
2w-0166 Radiator Gp
| 00***44 | Elbow; (45-Deg) | 1 |
| 00***53 | Elbow-Pipe; (1/2-14 Nptf Thd) | 2 |
| 02***41 | Bolt-Socket Head; (1/4-28x0.625-In) | 8 |
7e-5327 Connection Gp-Water -Outlet
| 11***94 | Cover | 1 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 4 |
| 1W***64 | Elbow-Outlet | 1 |
322-9019 Conversion Gp-Cooling System
| 11***32 | Lines Group-Air Conditioner | 1 |
| 12***17 | Lines Group-Water; -Aftercooler | 1 |
| 12***91 | Compressor & Mtg Group-Refrig | 1 |
1n-3599 Cover Gp-Radiator Cap
| 1M***49 | Ring (5.313" Dia.) | 1 |
| 1N***99 | Cover Group-Protection; Radiator Cap Protection Cover Group | 1 |
| 24***41 | Padlock Group; (1 On Fuel Tank Cap) (1 On Hydraulic Tank Cap) (1 On Grill Latch) | 1 |
158-0505 Fitting Gp-Water Lines
| 15***05 | Fitting Group-Water Lines | 1 |
| 3D***24 | O-Ring - For Oil Drain & Level Plug (Items 3 & 7) | 1 |
| 3P***98 | Elbow-Flared | 1 |
183-7142 Gauge Gp-Coolant Level
| 10***84 | Dial | 1 |
| 18***42 | Gauge Group-Coolant Level; -Engine, Aftercooler | 1 |
| 1W***01 | Gasket | 1 |
4w-1510 Housing & Regulator Gp
| 11***74 | Valve As-Vent Line | 1 |
| 12***32 | Housing As-Regulator | 1 |
| 24***13 | Regulator-Water Temperature; (92-Deg C)(Water, Coolant Temperature) | 4 |
155-0542 Lines Gp-Turbocharger Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
| 0S***08 | Bolt-Support To Starting Engine Timing Gear Housing | 2 |
5n-5978 Pump Gp-Auxiliary Water -Fresh Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 6 |
| 3J***89 | Plug Fuel Pump Bracket Turbocharger Oil Hole | 1 |
1w-0410 Pump Gp-Auxiliary Water
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 7 |
| 1T***32 | Seal-O-Ring; (234.54mm Id) | 1 |
| 1T***65 | Bolt 2.54 cm (1" Long) | 1 |
7e-9781 Pump Gp-Auxiliary Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 12***00 | Bearing-Sleeve | 1 |
212-8169 Pump Gp-Auxiliary Water -Fresh Water
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 12***00 | Bearing-Sleeve | 1 |
| 21***69 | Pump Group-Auxiliary Water; -Fresh Water | 1 |
291-4313 Pump Gp-Auxiliary Water -Fresh Water
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 12***00 | Bearing-Sleeve | 1 |
| 21***79 | Shaft; (14-Teeth) | 1 |
2w-9726 Pump Gp-Water
| 14***62 | Seal-O-Ring | 1 |
| 21***76 | Pump Group-Water | 1 |
| 22***53 | Kit-Rebuild; (Water Pump) | 0 |
2w-9725 Pump Gp-Water
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 2P***96 | Retainer | 1 |
| 2W***23 | Shaft As-Pump Drive | 1 |
212-8176 Pump Gp-Water
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 16***74 | Ring As | 1 |
| 16***76 | Seal Group-Water Pump; (Face Type) | 1 |
166-4377 Pump Gp-Water
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 16***74 | Ring As | 1 |
| 16***76 | Seal Group-Water Pump; (Face Type) | 1 |
122-0501 Pump Gp-Water
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 12***01 | Pump Group-Water | 1 |
| 12***45 | Seal Group-Face; (Water Pump) | 1 |
127-4439 Shield Gp-Water Manifold
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 12 |
| 12***39 | Shield Group-Water Manifold; -Rear | 1 |
163-2596 Valve Gp-Coolant Sampling
| 15***25 | Valve-Fluid Sampling | 2 |
| 15***70 | Cap-Dust; (Engine Coolant) | 2 |
| 16***96 | Valve Group-Coolant Sampling | 1 |
Electrical And Starting System
1w-6363 Starting Motor Gp-Electric
| 12***47 | Spacer; (17x30x20-mm Thk) | 6 |
| 1S***51 | Terminal-Cable; (00-Ga, 1/2-In Screw) | 2 |
| 1W***63 | Starting Motor Group-Electric | 1 |
6v-0889 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 03***23 | Bolt; (1/4-28x1-In) | 13 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
6v-0513 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 03***23 | Bolt; (1/4-28x1-In) | 13 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
197-8820 Alternator Gp-Charging -24-Volt, 95-Ampere
| 18***38 | Collar | 2 |
| 18***39 | Fan As; (Alternator) | 1 |
| 18***44 | Coil Assem. | 1 |
316-7251 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 18***34 | Nut-Flange; (5/8-18-Thd) | 1 |
| 1H***44 | Lockwasher (Bracket To Cab) | 2 |
9x-7803 Alternator Gp-Charging
| 03***12 | Screw-Forming; (10-24x0.5-In) | 4 |
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 10***32 | Collar; (Alternator) | 1 |
9x-9730 Battery Gp -Dry
| 7N***60 | Vent As; (Battery) | 6 |
| 9X***30 | Battery Group; (12 Volt)(Dry)(Each Includes) | 1 |
107-9513 Control & Mtg Gp-Engine Elek
| 10***13 | Control & Mtg Group-Engine Elek | 1 |
| 11***60 | Bracket | 1 |
| 11***87 | Elbow | 2 |
176-7503 Control Gp-Engine Electronic
| 10***87 | Bolt; (M5x0.8x12-mm) | 4 |
| 11***11 | Cover | 1 |
| 12***74 | Screw-Pan Head; (8-32x9.52-mm) | 1 |
130-7481 Control Gp-Engine Electronic
| 10***87 | Bolt; (M5x0.8x12-mm) | 4 |
| 11***11 | Cover | 1 |
| 12***74 | Screw-Pan Head; (8-32x9.52-mm) | 1 |
132-8900 Control Gp-Engine Electronic
| 13***81 | Control Group-Engine Electronic; -Personality Module | 1 |
| 13***00 | Control Group-Engine Electronic; -Rear Ecm-Front Ecm | 1 |
322-9020 Conversion Gp-Electrical
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 0 |
| 11***45 | Plug As-Connector; (40-Pin) | 1 |
| 11***66 | Sensor & Mounting Group; -Turbocharger Inlet | 1 |
118-2066 Sensor & Mounting Gp
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***04 | Kit-Receptacle; (4-Pin)(Start Switch) | 1 |
| 11***66 | Sensor & Mounting Group; -Turbocharger Inlet | 1 |
163-7882 Sensor Gp-Exhaust Temperature
| 16***82 | Sensor Group-Exhaust Temperature | 1 |
| 26***47 | Adapter | 1 |
| 26***48 | Sensor Group-Exhaust Temperature | 1 |
266-1466 Sensor Gp-Position
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 12***67 | Pin-Connector; (14-Ga To 16-Ga)(14-Ga Wire) | 3 |
| 26***66 | Sensor Group-Position; -Throttle | 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 |
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 |
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 |
273-5041 Sensor Gp-Speed
| 11***66 | Seal-O-Ring | 1 |
| 13***07 | Washer; (21.1x28.1x0.9-mm Thk) | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
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 |
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 |
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 |
135-7826 Starting Aid Gp-Ether
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 3 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 11***54 | Nozzle As-Ether | 2 |
171-8709 Switch Gp-Flow -Coolant
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 17***09 | Switch Group-Flow; -Coolant | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 2 |
172-8660 Switch Gp-Liquid Level
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 17***60 | Switch Group-Liquid Level; -Rear Engine Oil-Ster, Hydraulic Fan Oil-Engine On-Steering Oil, Engine Off-Auxiliary Coolant-Front Engine Oil-Brake Oil, Hoist-Engine Coolant-Tc Oil-Low, Cold | 1 |
| 9X***01 | Pin-Connector; (16-Ga To 18-Ga)(Throttle Position Sensor) | 2 |
139-2116 Switch Gp-Toggle
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 4 |
| 13***16 | Switch Group-Toggle; (Ground Level Ladder Lamp) | 1 |
| 3E***71 | Wedge; (Receptacle Lock) (3 Pin) | 1 |
195-3817 Wiring Gp-Engine
| 03***41 | Elbow; (7/16-20 Str Thd) | 1 |
| 09***52 | Bar | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 3 |
Engine Arrangement
269-4945 Conversion Ar-Engine
| 25***50 | Engine Ar | 1 |
| 26***45 | Conversion Ar-Engine | 1 |
| 32***19 | Conversion Group-Cooling System | 1 |
257-6350 Engine Ar
| 10***14 | Fumes Disposal Group | 1 |
| 10***80 | Pump Group-Fuel Injection | 8 |
| 10***36 | Crankshaft Group | 1 |
322-9023 Installation Gp-Engine
| 10***70 | Valve Group-Diverter; -Tc, Front Brake Cooling | 1 |
| 10***32 | Seal-O-Ring | 2 |
| 11***47 | Gauge Group-Oil Level (Dipstick); -Engine | 1 |
Fuel System
6i-4470 Filter Gp-Fuel
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 5 |
| 1R***55 | Filter As-Fuel; (Advanced Efficiency) | 2 |
132-0203 Injector Gp-Fuel
| 13***03 | Injector Group-Fuel | 1 |
| 8J***25 | Seal-O-Ring | 1 |
| 9X***35 | Seal-O-Ring | 1 |
150-4453 Injector Gp-Fuel
| 15***53 | Injector Group-Fuel | 1 |
| 19***84 | Seal-O-Ring | 1 |
| 9X***35 | Seal-O-Ring | 1 |
117-0074 Lines Gp-Fuel Injection
| 00***81 | Tee-Union; (Flared 37-Deg) | 1 |
| 03***49 | Elbow; (90 Degree, 37 Degree Flared) | 3 |
| 03***72 | Elbow; (Flared 90 Degree) | 1 |
156-9752 Manifold Gp-Fuel -Rh
| 10***37 | Grommet | 8 |
| 14***45 | Washer-Retaining | 4 |
| 15***48 | Clamp | 4 |
156-9751 Manifold Gp-Fuel -Lh
| 10***37 | Grommet | 8 |
| 14***45 | Washer-Retaining | 4 |
| 15***48 | Clamp | 4 |
100-8780 Pump Gp-Fuel Injection
| 10***80 | Pump Group-Fuel Injection | 1 |
| 23***82 | Plug | 1 |
| 24***07 | Seal-O-Ring | 1 |
165-9154 Pump Gp-Fuel Priming
| 16***54 | Pump Group-Fuel Priming; -Manual | 1 |
| 18***23 | Pump As-Fuel Priming | 1 |
| 7X***01 | Bolt-Plt; (1/4unc X 1 1/4) | 1 |
8n-6151 Pump Gp-Fuel Transfer
| 1H***96 | Packing,Preformed Cartridge Part Of Kit P/N 4j***80 | 1 |
| 1N***36 | Coupling-Drive | 1 |
| 22***60 | Pump Group-Fuel Transfer | 1 |
1n-4478 Pump Gp-Fuel Transfer
| 11***96 | Seal-Lip; (Outer) | 1 |
| 11***97 | Seal-Lip; (Inner) | 1 |
| 12***37 | Shaft As-Drive | 1 |
169-8615 Pump Gp-Fuel Transfer
| 11***97 | Seal-Lip; (Inner) | 1 |
| 12***37 | Shaft As-Drive | 1 |
| 16***15 | Pump Group-Fuel Transfer | 1 |
313-7770 Pump Gp-Fuel Transfer
| 25***91 | Kit-Seal | 1 |
| 25***92 | Kit-Repair; (Gear, Shaft) | 1 |
| 31***70 | Pump Group-Fuel Transfer; -1-Section Gear | 1 |
225-4260 Pump Gp-Fuel Transfer
| 11***97 | Seal-Lip; (Inner) | 1 |
| 16***17 | Seal-Lip Type; (Outer) | 1 |
| 1W***03 | Gear As-Idler | 1 |
Hydraulic System
105-0170 Valve Gp-Diverter
| 03***60 | Bolt-Self Locking; (5/16-18x1.0) | 2 |
| 06***56 | Seal-O-Ring | 1 |
| 10***75 | Spring | 1 |
Lubrication System
2w-0177 Filter Gp-Engine Oil
| 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 | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
4w-6170 Lines Gp-Engine Oil
| 06***56 | Seal-O-Ring | 4 |
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 4 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 3 |
101-0838 Breather Gp -Crankcase
| 03***31 | Seal-O-Ring | 2 |
| 10***38 | Breather Group; -Crankcase | 1 |
| 10***99 | Cover As | 2 |
117-0056 Filler Gp-Engine Oil
| 03***37 | Bolt-Shoulder; (1/4-20x1-In) | 1 |
| 10***72 | Hasp | 1 |
| 11***41 | Support-Front | 1 |
1n-4764 Filler Gp-Engine Oil
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 3 |
| 11***57 | Bracket | 1 |
100-6014 Fumes Disposal Gp
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 1 |
| 10***14 | Fumes Disposal Group | 1 |
117-0047 Gauge Gp-Oil Level (Dipstick) -Engine
| 11***43 | Gauge As-Oil Level; (Dipstick, Engine) | 1 |
| 11***44 | Tube As-Oil Level | 1 |
| 11***47 | Gauge Group-Oil Level (Dipstick); -Engine | 1 |
109-8081 Lines Gp-Turbocharger Oil
| 03***36 | Tee-Flared | 1 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 8 |
7w-0053 Pump Gp-Engine Oil -2-Section Gear
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 6 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 9 |
| 11***49 | Gasket | 1 |
7n-8715 Pump Gp-Engine Oil -2-Section Gear
| 29***87 | Seal-O-Ring | 1 |
| 4S***82 | Bolt 7.25 In. (18.42 cm) Long | 3 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 3 |
8n-9164 Pump Gp-Scavenge -1-Section Gear
| 05***79 | Washer; (13.5x44.45x10-mm Thk) | 1 |
| 0S***84 | Cap Screw (2 1/4" Long) | 1 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
1n-3240 Pump Gp-Scavenge
| 03***74 | Bolt; (3/8-16x3.375-In) | 2 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 3 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 2 |
Operator Station
129-9491 Compressor & Mtg Gp-Refrig
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 10***80 | Pulley Group-Idler | 1 |
| 11***25 | Bracket | 1 |
198-4564 Compressor Gp-Refrigerant
| 01***11 | Screw; (10-16x0.25-In) | 3 |
| 14***97 | Valve As-Relief; (Refrigerant Compressor) | 1 |
| 19***64 | Compressor Group-Refrigerant | 1 |
130-8608 Condenser & Mtg Gp-Refrigerant
| 13***08 | Condenser & Mtg Group-Refrigerant | 1 |
| 13***02 | Tube As | 2 |
| 4W***85 | Plate | 2 |
118-3532 Lines Gp-Air Conditioner
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 10***92 | Grommet | 1 |
| 10***00 | Fitting As-Air Conditioner; (Quick Disconnect)(Refrigerant) | 1 |
137-0013 Pedal Gp-Governor
| 12***31 | Cover | 1 |
| 13***13 | Pedal Group-Governor | 1 |
| 13***24 | Plate As | 1 |
8c-5471 Tachometer Gp
| 3L***87 | Lockwasher 7.24mm(.285in.)O.D.; (3.7x7.24x.48mm Thk) | 3 |
| 4B***24 | Washer; (3.9x9.6x1.2-mm Thk) | 3 |
| 6V***68 | Nut (6-32)Thd; (No. 6-32) | 3 |
Power Train
128-4953 Lines Gp-Transmission Oil
| 0T***19 | Bolt Hose Assembly At | 4 |
| 12***53 | Lines Group-Transmission Oil | 1 |
| 1P***04 | Seal - Rectangular (45mm Dia) | 1 |
2p-2859 Valve Gp-Relief
| 1P***20 | Spring (Outer) | 1 |
| 1S***43 | Spring (Inner) | 1 |
| 2K***94 | Pin-Spring; (7.94x76.2-mm) | 1 |
777 serial number reference
On the Cat 777 family the PIN/serial number plate is a riveted metal tag mounted on the truck's main frame, typically on the left side near the front below the cab/steps area (exact position noted in the machine's Operation & Maintenance Manual diagram); some units also repeat it on a plate visible through the lower cab structure. On modern (post-2001) 17-character PINs the identifying 3-character alphanumeric model/plant prefix is followed by a sequence number in the last 8 characters (e.g. AGC00717); the prefix alone tells you the model/generation and build source, while the exact build year must be looked up against that prefix in Cat's SIS system or via a dealer. The original 1974-1985 777 (prefix 84A) predates this 17-character PIN convention and instead used a simple prefix-plus-sequence serial (e.g. 84A00001), found on the equivalent frame-mounted tag.
| Prefix | Identifies | Notes |
|---|---|---|
| 84A | 777 (original series, 1974-1985) | First-generation Cat 777, introduced 1974, powered by the Cat D348 V12 diesel rated about 870 hp (649 kW) gross. SIS parts catalog lists serial 84A00001-01283 with D348 engine. Production 1975-1985, distinct from 777B. "777A" designation unsupported by factory documentation. |
| 4YC | 777B | Second-generation model; parts-catalog and lineage sources place production start in the mid-1980s (1985), replacing the original 777. Fitted with the Cat 3508 diesel (sources are split between DITA- and EUI-injection variants for this era, so treat fuel-system detail as varying by configuration), rated roughly 920 hp (686 kW) gross per cross-referenced machine-specs sources. |
| 4XJ | 777C | Generation between the 777B and 777D; a dedicated specs source dates production to 1995-1996, consistent with the 777D succeeding it in 1996. Powered by the Cat 3508 diesel - sources vary between DITA and EUI injection references for this platform and quote gross ratings from roughly 775 hp up to about 1,000 hp (746 kW) depending on configuration, so treat horsepower and injection-system detail as varying by configuration/series rather than fixed. |
| 3PR | 777D | Earlier of the main US/global-market 777D production runs, beginning 1996 when the 777D replaced the 777C. Powered by the Cat 3508B EUI diesel rated about 1,000 hp gross (approx. 938 hp / 699 kW net flywheel per factory tech-specs). |
| AGC | 777D | Later/higher-volume US-market 777D production run, same 3508B EUI engine and rating as other 777D-prefix trucks. |
| AGY | 777D | 777D-family prefix referenced in Caterpillar electrical-schematic documentation indexed alongside the 776D/777D platform; production era and volume are less clearly documented than 3PR/AGC/FKR. Single clear source beyond the parts-catalog index - confirm with dealer before relying on it for parts fitment. |
| 2YW | 777D | 777D-family prefix listed alongside 3PR/AGC/AGY/FKR in a parts-catalog prefix index; a components reseller separately lists 2YW against the 777D. Thinner sourcing than the main 3PR/AGC/FKR runs - confirm with dealer. |
| FKR | 777D | Continuation of 777D production in India (Caterpillar India Private Limited-sourced, introduced to that market around 2006-2007, continuing into the mid-2010s) for markets without strict emissions regulation, after standard-market production moved to the 777F. Still the 3508B EUI-based 777D platform. |
| JRP | 777F | Earliest 777F production run, beginning around 2006 when the 777F replaced the 777D in regulated markets. Powered by the Cat C32 ACERT diesel, roughly 1,016-1,025 hp (758 kW) gross depending on rating/emissions tier. |
| JXP | 777F | Later 777F production run (cited around 2008), same C32 ACERT engine platform as JRP-prefix trucks. |
| WTK | 777F | Final 777F production run (cited around 2010) before the model transitioned to the 777G. Same C32 ACERT diesel platform. |
| RDR | 777G | One of several 777G production/configuration runs starting with the model's circa-2011-2012 introduction. Powered by the Cat C32 ACERT diesel, rated about 1,025 hp (764 kW) gross per factory tech-specs. |
| T4Y | 777G | 777G production run from around 2011, same C32 ACERT platform. |
| T5A | 777G | 777G production run from around 2011, paired with T4Y in some combined service and operation-and-maintenance manuals; same C32 ACERT platform. |
| TNM | 777G | 777G production run from around 2011-2012 (a documented example is a 2012-model truck carrying a TNM-prefix serial); also seen as the prefix range (TNM1-Up) on a factory parts/specs document. Same C32 ACERT platform. |
| GT7 | 777G | Later 777G production run (cited around 2014), same C32 ACERT platform as other 777G-prefix trucks. |
Frequently asked questions
What engine does the Caterpillar 777 use?
The original Caterpillar 777 (1974-mid-1980s) is powered by the Cat D348, a turbocharged V12 diesel displacing about 29.3 liters (roughly 1,786-1,788 cu in), rated at approximately 870 gross flywheel horsepower (649 kW). This is a purely mechanical fuel-injection engine with no electronic controls. It should not be confused with the later 777B (Cat 3508) or the unrelated modern truck that reuses the '777' name with a Cat C32B engine.
What is the operating weight of the Caterpillar 777?
Empty weight is approximately 122,600-124,400 lb (55.6-56.4 t) depending on body configuration, with a gross/loaded weight of about 294,405 lb (133.5 t) at its rated payload of roughly 85 tons (77 t). Figures vary slightly by source and body option, so treat these as a verified range rather than a single fixed number.
What replaced the Caterpillar 777?
The original D348-powered 777 was succeeded in the mid-1980s by the 777B, which used a Cat 3508 engine and began the long-running 777B-777C-777D-777F-777G lineage. Note that a modern truck also carries the bare '777' nameplate today (with a Cat C32B engine) as the successor to the 777G -- that is a separate, unrelated machine and not part of this original 777's direct lineage.
What 777 owners discuss
What's the real story on the D348 V12 engine's long-term reliability, and is it still practical to keep one running today?
The D348 is generally regarded as a strong, torquey, mechanically-governed diesel (about 870 flywheel hp from a roughly 29.3 L / 1,786 cu in V12, direct-injected and turbocharged) that also powered the 992/992B wheel loader and the D10 dozer, so mechanics of that era cross-trained on it and it earned a reputation as tough, simple iron. The catch that comes up repeatedly in owner/mechanic circles today is that, decades on, D348 spare parts have become scarce and hard to source. Owners of D348-powered machines (documented mainly for the D10 dozer, which shares this exact engine) have posted about pulling the D348 entirely and repowering with the newer 3508 rather than continue chasing parts for the old engine - a good indicator of what the surviving-fleet community sees as the practical limit of keeping an original engine alive long-term. Have your dealer or a qualified diesel shop verify parts sourcing options and current engine condition (blow-by, oil analysis) before committing to any rebuild.
What's distinctive about the 777's suspension and steering setup, and does it need special care?
Write-ups on the original truck consistently highlight its four large oil-pneumatic (nitrogen-over-oil) suspension cylinders as a signature feature, with the front pair doing double duty as the steering kingpins - a novel arrangement for the class that gave the truck an unusually tight turning radius (around 88 ft) for an 85-ton hauler. Because the front cylinders combine suspension load-bearing with steering-pivot duty, seal and gas-charge integrity affects both ride quality and steering geometry at the same time, unlike a conventional kingpin-and-leaf-spring front end. These cylinders are designed as large-bore, low-pressure units meant to run long between service, but any nitrogen leak-down or oil weeping at the front pair specifically should be treated as a steering issue, not just a ride-comfort one. Have your dealer verify suspension cylinder nitrogen charge and seal condition, especially on the front pair.
How does the 7-speed powershift transmission behave, and what should owners watch for?
The 777 uses a 7-speed automatic powershift transmission paired with a torque converter, built around multiple wet clutch packs running submerged in oil - a design shared in principle across Cat's powershift line of that generation. A behavior commonly discussed around older Cat wet-clutch powershifts in general is a "false neutral" during a shift, usually traced to worn transmission linkage or clutch-pack wear that lets a gear briefly disengage before the next one fully engages; this is described as a known characteristic of aging Cat powershift boxes of this type rather than a defect unique to the 777. Because the gearbox is shifting enormous torque loads while still under power, linkage adjustment and clutch pack wear are worth checking at any inspection. Have your dealer verify transmission linkage adjustment and clutch pack condition before returning the machine to service.
What brake and tire/undercarriage wear patterns are typical for a truck in this class?
The 777 was built around a sealed, oil-cooled disc brake arrangement (commonly described as dry front calipers paired with oil-cooled multiple-disc rear brakes) meant to survive continuous mining haul-road duty without fade. How fast those brakes wear tracks mainly with grade, load, and haul-road maintenance rather than a fixed hour interval, so actual wear life varies by site and duty cycle. On tires, the original truck ran in the 24.00-49, 42-ply class; at that size and loading the wear modes owners watch for are heat buildup, haul-road debris cuts, and sidewall damage from curb/berm contact. Since this design predates factory electronic traction control, tire wear management on the original 777 depended on operator technique and haul-road upkeep rather than an onboard traction system. Have your dealer or tire technician verify brake wear and tire condition against your site's duty-cycle norms.
The 777 doesn't have modern sensors or fault codes - so what actually causes "electrical" problems on these trucks?
Because the original 777 predates Cat's electronic engine control era, its electrical system is comparatively simple: a 24V system feeding lighting, gauges, and starting, with the D348's fuel delivery controlled mechanically rather than by an ECM - so there are no diagnostic fault codes to read as there would be on a modern truck. What owners and rebuilders actually report running into are old-school charging-system issues (tired 24V alternators, typically in the 50-100 amp range, and their internal regulators), wiring and connector corrosion after decades of service, and a sticky or gummed-up mechanical governor/injection pump linkage - often from fuel varnish or asphaltene buildup - that can present like an electrical no-start or surging idle but is actually a fuel-governor mechanical fault. Have your dealer or diesel shop verify charging system output and governor/injection pump linkage condition.
Is the exhaust-heated dump body a real feature, and does it cause any issues?
Yes - this is a genuine, well-documented design detail of the original 777: the dump body's box-sectioned ribs were ducted to route engine exhaust heat into the bed, intended to keep sticky or frozen material from hanging up during dumping in cold climates. It's discussed as one of the truck's more clever period engineering touches. The tradeoff worth knowing about with any exhaust-heated bed is that the ducting and ribs see both structural impact loading from the payload and thermal cycling from the exhaust heat, so that area deserves a closer look for cracking or exhaust leaks over a truck's working life. Have your dealer verify exhaust duct routing and bed rib integrity.
We're looking at a used original Cat 777 (D348 engine) - what should we check before buying?
Since this is now a roughly 45-50 year old design, treat the purchase more like vintage heavy iron than a routine used-truck deal: verify actual engine hours and D348 condition (blow-by, oil analysis, governor/injection pump behavior), and ask specifically about parts-sourcing plans, since D348 parts are widely reported as increasingly scarce - a big reason owners of shared-engine machines like the D10 dozer eventually repower to a 3508 rather than keep rebuilding the original engine. Beyond the engine, walk the frame and dump body for cracks or repair welds (paying particular attention around the exhaust-heated bed ribs), check all four suspension cylinders for nitrogen leak-down or oil seepage (remembering the front pair also carries steering-kingpin duty), confirm the 7-speed powershift shifts cleanly with no false-neutral tendency, inspect the oil-cooled rear disc brakes for wear and contamination, and check tires in the 24.00-49 class for age-cracking and cuts given how hard that size can be to source today. Have your dealer perform a full engine, transmission, brake, and structural inspection before you commit to purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Caterpillar 777. Related factory variants of the same model family:
777
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