Caterpillaroff-highway trucktruck
Caterpillar 769C
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 769C is a rigid-frame, off-highway rock truck engineered for heavy-duty material transport in mining, quarrying, and large-scale earthmoving applications. This machine features a twin-turbocharged 3408 engine delivering 450 hp (net) and 474 hp (gross) at 2000 rpm. Designed for short to medium haul cycles, the 769C supports a rated payload of 36,741 kg (81,000 lb) with a heaped load capacity of approximately 23.6 m³ (30.87 yd³). The truck utilizes an electronically controlled power shift transmission with 7 forward gears and 1 reverse gear.
Across its production lineage, the 769C represents a specialized evolution in Caterpillar's rigid-frame hauling capability, sitting between earlier 769 models and later iterations like the 769D. In today's used equipment market, the 76 and 769 series remain vital for secondary mining and construction fleets due to their proven durability and availability of parts. The machine's importance is driven by its ability to move overburden and aggregate efficiently in demanding environments where newer, higher-tier emission engines may not be required.
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 769C specifications
Engine
| Model | 3408 |
| Gross Power | 474 hp (353.5 kW) |
| Net Power | 450 hp (335.6 kW) |
| Displacement | 1098.5 cu in (18 l) |
| Cylinders | 8 |
| Aspiration | twin-turbocharged |
Weights
| Empty Weight | 67,626.8 lb (30,675 kg) |
| Loaded Weight | 149,001.7 lb (67,586 kg) |
| Weight Distribution Front - Empty | 49.6 % |
| Weight Distribution Rear - Empty | 50.4 % |
| Weight Distribution Front - Loaded | 33.3 % |
| Weight Distribution Rear - Loaded | 67.7 % |
Dimensions
| Overall Length | 26.27 ft (8,007 mm) |
| Overall Width | 14.81 ft (4,514 mm) |
| Overall Height | 12.4 ft (3,777 mm) |
| Wheelbase | 12.17 ft (3,708 mm) |
| Ground Clearance | 2.02 ft (615 mm) |
| Dump Ground Clearance | 1.83 ft (557 mm) |
| Dump Height | 25.25 ft (7,695 mm) |
Performance
| Max Speed | 46.8 mph (75.2 km/h) |
| Transmission Type | electronically controlled power shift |
| Number of Forward Gears | 7 |
| Number of Reverse Gears | 1 |
| Raise Time | 11 sec |
| Lower Time | 11.4 sec |
| Rated Payload | 81,000 lb (36,741 kg) |
| Load Capacity - Heaped | 30.87 yd³ (17.5 m³) |
| Load Capacity - Struck | 22.89 yd³ (23.6 m³) |
Service capacities (summary)
| Fuel Tank Capacity | 530 l (140.1 gal) |
| Hydraulic System Fluid Capacity | 364 l (96.2 gal) |
| Engine Oil Capacity | 45 l (11.9 gal) |
| Cooling System Fluid Capacity | 113.5 l (30 gal) |
| Steering System Fluid Capacity | 55 l (14.6 gal) |
| Brake/Hoist System Fluid Capacity | 220 l (58.2 gal) |
| Differential and Final Drive Fluid Capacity | 83 l (22 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
769C fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase | 45 L (11.9 US gal) | Cat DEO; SAE 15W-40 or SAE 10W-30 |
| Cooling System | 113.5 L (30 US gal) | Cat ELC (50/50 Premix) |
| Fuel Tank | 530 L (140.1 US gal) | |
| Transmission/Powertrain Compartments | 83 L (22 US gal) for differential/final drive | Cat TDTO; SAE 10W, SAE 30, or SAE 50 |
| Hydraulic System and Tank | 364 L (96.2 US gal) | Cat HYDO Advanced 10 (cold/moderate) or Cat HYDO Advanced 30 (hot) |
| Steering System | 55 L (14.6 US gal) | |
| Brake/Hoist System | 220 L (58.2 US gal) | |
| Grease | Cat Multipurpose, Advanced 3Moly, Ultra 5Moly, Desert Gold, or Arctic Platinum |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 769C maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the 769C beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Caterpillar S.O.S Services to monitor engine oil, hydraulic fluid, and coolant. Analyze engine oil for wear metals like iron or copper and contaminants such as silicon (dirt) or sodium (coolant). For the 769C hydraulic system, track particle counts and viscosity to prevent pump cavitation. Regular sampling of transmission and final drive oil identifies gear wear before catastrophic failure occurs. Always ensure cross-contamination between different fluid types remains below 10% during top-offs.
Corrective & Common Repairs
Address common 769C issues by monitoring for hydraulic leaks and hose abrasions. If the engine exhibits low oil pressure, inspect the pump and check for dilution from fuel. Fault codes (MID/CID/FMI) should be diagnosed using Caterpillar Electronic Technician to pinpoint sensor or actuator failures in the electronically controlled transmission. Frequent checks of the 3408 engine's turbocharger and air intake system can prevent significant soot loading and internal component damage.
Overhaul & Rebuild Points
Plan major interventions around the 2,000-hour PM4 interval. Critical rebuild points include a full hydraulic oil change, transmission service, and a comprehensive structural inspection of the frame and dump body. Evaluate the condition of the 3408 engine's pistons and rings if oil analysis shows high metal content. During major overhauls, inspect all ROPS/FOPS mounting bolts for proper torque and check the integrity of the chassis castings in high-stress areas.
Seasonal & Environment Servicing
In dusty or quarry environments, shorten air filter inspection intervals to daily checks and replace elements more frequently. Clean radiator and oil cooler fins daily to prevent overheating. For extreme cold, utilize Caterpillar Arctic Platinum Grease and ensure the 24V electrical system and batteries are load-tested. In high-heat applications, monitor coolant SCA levels closely to prevent liner pitting and maintain proper cooling system fluid volumes.
769C common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 1R-0749 | Filter-Fuel | Fuel system service | Check fitment → |
| 1R-1808 | Filter As-Engine Oil | Lubrication service | Check fitment → |
| 8T-6765 | Plug-Pipe | Scheduled service item | Check fitment → |
| 9S-8752 | Nut-Full | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
769C fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| 110-0 | Engine Coolant Temperature — Above Normal | Low coolant level, thermostat failure | Inspect cooling system, refill coolant, test thermostat |
| 110-3 | Engine Coolant Temperature Sensor — Voltage High | Open circuit or sensor failure | Check wiring; replace sensor if confirmed faulty |
| 174-3 | Engine Fuel Temperature — Voltage Above Normal | Open circuit in sensor wiring | Inspect harness and replace sensor if necessary |
| 190-8 | Engine Speed — Abnormal Frequency | Speed sensor air gap, sensor failure, or tone ring damage | Check sensor gap; test speed sensor and tone ring |
| 41-3 | 8-Volt DC Supply — Voltage Above Normal | Short to power on 8V reference circuit | Inspect sensors sharing the 8V supply and isolate fault |
| 41-4 | 8-Volt DC Supply — Voltage Below Normal | Short to ground on 8V reference circuit | Disconnect sensors one at a time to locate short |
| E360 | Engine Coolant Temperature — High | Low coolant, failed thermostat, or water pump issue | Diagnose cooling system; do not operate until resolved |
| E361 | Engine Coolant Temperature — Very High (Shutdown) | Severe cooling system failure | Engine shutdown required; perform full cooling system diagnosis |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
769C attachments & work tools
Body and Payload Customization
Custom attachments include tail extensions, sideboards, and liner packages to help maintain rated payload. Wear resistance can be enhanced with 400 Brinell Steel surfaces.
Haulage and Material Handling
The machine is configured for heavy-duty transport of overburden, aggregate, and bulk materials. Standard bodies are exhaust heated, with options for full-time mufflers or exhaust diverters available.
System Integration and Monitoring
Optional attachments can integrate directly with the CAT Data Link System. Available configurations include Truck Production Management System (TPMS) for payload and cycle time data, and Automatic Retarder Control (ARC).
Tire and Wheel Configurations
A full line of tire options from various manufacturers is offered to suit specific application requirements. Standard tire size is 18-33 28 PR.
All 769C assemblies by section
Every catalogued assembly group for the Caterpillar 769C. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
126-7290 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 | 14 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 2 |
1w-1653 Cartridge Gp-Turbocharger
| 0S***16 | Screw,Cap,Hexagon H Receptacle Mtg; Bolt Brackets To Firewall Assembly | 4 |
| 12***63 | Wheel-Compressor | 1 |
| 1P***20 | Ring-Seal | 1 |
352-8465 Conversion Gp-Air Inlet & Exh
| 10***21 | Manifold As | 1 |
| 10***68 | Plate As | 4 |
| 12***50 | Elbow | 1 |
129-5249 Lines Gp-Air
| 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 | 6 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
166-0164 Manifold Gp-Exhaust
| 10***12 | Spacer; (11.13x19.05x53-mm Thk) | 16 |
| 12***52 | Gasket-Exhaust Manifold | 8 |
| 16***09 | Manifold-Exhaust | 2 |
127-9177 Turbocharger Gp
| 12***77 | Turbocharger Group | 1 |
| 1S***95 | Gasket-Turbocharger To Manifold; Gasket Turbocharger To Manifold | 1 |
| 1W***80 | Turbocharger Group | 1 |
1w-5580 Turbocharger Gp
| 1W***53 | Cartridge Group-Turbocharger | 1 |
| 1W***80 | Turbocharger Group | 1 |
| 6N***85 | Housing-Turbine; (Turbine) | 1 |
Basic Engine
4n-7736 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 | 1 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 1 |
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-7747 Lines Gp-Air Compressor
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 2 |
| 11***27 | Seal-O-Ring; (19.18mm Id) | 1 |
| 2N***87 | Elbow-Flared Needed For Customer; (Used Without Brakesaver) | 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 |
4n-1092 Balancer Gp
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 1B***82 | Bolt (1.25 In. Long X .313 In. Dia.) | 1 |
| 1W***49 | Shaft-Balance Weight | 1 |
108-1547 Camshaft Gp
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 10***74 | Gear-Camshaft Drive; (86-Teeth) | 1 |
| 10***47 | Camshaft Group | 1 |
129-5242 Cover Gp-Cylinder Block
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 11 |
| 12***42 | Cover Group-Cylinder Block | 1 |
| 23***37 | Seal-Integral | 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 |
9y-3788 Cover Gp-Oil Pan
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 1 |
| 10***72 | Seal-O-Ring; (40.64-mm Id) | 1 |
129-5243 Cover Gp-Valve Mechanism
| 10***88 | Base-Valve Mechanism Cover | 4 |
| 11***84 | Cover-Valve Mechanism | 1 |
| 11***15 | Cover As-Valve | 3 |
1w-5009 Crankshaft As
| 1W***09 | Crankshaft As | 1 |
| 4N***84 | Dowel; (.75 Long) | 1 |
| 7N***91 | Gear-Crankshaft; (80-Teeth) | 1 |
1w-5010 Crankshaft Gp
| 1W***09 | Crankshaft As | 1 |
| 1W***10 | Crankshaft Group; Crankshaft Group | 1 |
| 24***18 | Kit-Crankshaft Bearing | 0 |
110-3779 Cylinder Block As
| 11***20 | Seal-O-Ring; (Mid-Liner) | 8 |
| 11***79 | Cylinder Block As | 1 |
| 14***17 | Seal-O-Ring; (140.20mm Id) | 8 |
109-9009 Cylinder Block Gp
| 10***17 | Stud-Taperlock | 18 |
| 10***09 | Cylinder Block Group | 1 |
| 11***79 | Cylinder Block As | 1 |
143-3614 Cylinder Head As
| 10***94 | Dowel | 2 |
| 14***40 | Cylinder Head As | 1 |
| 14***14 | Cylinder Head As | 1 |
143-0040 Cylinder Head As
| 14***40 | Cylinder Head As | 1 |
| 1W***83 | Insert-Valve Seat; (Exhaust)(Standard) | 8 |
| 3B***23 | Core Plug--Flywheel Housing Pinion Shaft Hole | 8 |
105-3788 Cylinder Head As
| 10***88 | Cylinder Head As | 1 |
| 1W***83 | Insert-Valve Seat; (Exhaust)(Standard) | 8 |
| 3B***23 | Core Plug--Flywheel Housing Pinion Shaft Hole | 8 |
107-7320 Cylinder Head Gp
| 10***94 | Dowel | 2 |
| 10***88 | Cylinder Head As | 1 |
| 10***20 | Cylinder Head Group | 1 |
107-7319 Cylinder Head Gp
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 06***61 | Seal-O-Ring (Id=40.87mm) | 8 |
| 10***92 | Stud-Taperlock; (3/8-16x3.93in) | 16 |
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 |
2w-6533 Flywheel Gp
| 1N***25 | Bolt-12 Point Head; (5/8-18x6.75-In) | 12 |
| 2W***33 | Flywheel Group | 1 |
| 3G***56 | Washer-Special; (5.0mm Thk) | 12 |
126-7281 Gear Gp-Front
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 1 |
| 10***13 | Plate-Retaining | 1 |
| 11***17 | Plate-Thrust | 1 |
129-5244 Housing Gp-Flywheel
| 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 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 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 |
126-7279 Lifting Gp-Engine
| 11***75 | Bracket-Lifting; (Right) | 2 |
| 12***79 | Lifting Group-Engine | 1 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 8 |
6i-3744 Pan Gp-Oil -Engine
| 11***14 | Pan-Oil; (Engine Oil) | 1 |
| 2P***03 | Bolt-Washer Head; (3/8-16x1.25-In) | 32 |
| 4N***51 | Gasket; (Engine Oil Pan) | 1 |
109-2823 Piston & Rod Gp
| 10***23 | Piston & Rod Group | 1 |
| 13***61 | Ring-Piston; (Top)(Top) | 1 |
| 15***56 | Bolt-Special; (Oil Jet) | 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 |
129-5235 Plug Gp-Cylinder Block
| 12***35 | Plug Group-Cylinder Block | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 3 |
| 7W***34 | Plug-Pipe (3/8-18 Nptf Thd) | 5 |
126-1336 Plug Gp-Cylinder Head
| 12***36 | Plug Group-Cylinder Head | 1 |
| 4N***32 | Plug-Cup | 2 |
| 5P***63 | Plug-Cup | 3 |
107-1954 Rocker Arm Gp
| 10***54 | Rocker Arm Group | 1 |
| 10***03 | Screw; (3/8-24x1.67-In)(Intake) | 2 |
| 12***63 | Bracket-Shaft | 1 |
319-7401 Seal Gp-Crankshaft -Front
| 14***67 | Seal Group-Crankshaft; (Front) | 1 |
| 31***01 | Seal Group-Crankshaft; -Front | 1 |
319-0785 Seal Gp-Crankshaft -Rear
| 14***68 | Seal-Crankshaft; (Rear)(Flywheel Housing) | 1 |
| 31***85 | Seal Group-Crankshaft; -Rear | 1 |
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 |
4n-4303 Trunnion Gp-Engine
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 6 |
| 4N***03 | Trunnion Group-Engine; Engine Trunnion Group | 1 |
| 4W***50 | Adapter-Support | 1 |
108-1551 Valve Mechanism Gp
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 8 |
| 10***89 | Bridge-Valve | 16 |
| 10***88 | Valve Lifter Assem | 16 |
Cooling System
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 |
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 |
133-8404 Lines Gp-Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 1 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 6 |
129-5247 Lines Gp-Water
| 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 |
4n-1951 Pump Gp-Water
| 10***49 | Adapter-Inlet | 1 |
| 11***79 | Seal-O-Ring | 1 |
| 11***80 | Seal-O-Ring | 1 |
105-0197 Pump Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 10***97 | Pump Group-Water | 1 |
| 10***85 | Retainer | 1 |
134-1486 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 |
137-1338 Pump Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 10***30 | Bearing As-Roller | 1 |
| 11***21 | Plug-Felt; (Water Pump Housing) | 1 |
Electrical And Starting System
223-2340 Control & Mtg Gp-Engine Elek
| 11***69 | Spacer-Special; (8.2x25x89.7-mm Thk) | 4 |
| 15***71 | Control Group-Engine Electronic | 1 |
| 22***40 | Control & Mtg Group-Engine Elek | 1 |
156-7171 Control Gp-Engine Electronic
| 15***71 | Control Group-Engine Electronic | 1 |
| 15***72 | Control Group-Engine Electronic | 1 |
156-7172 Control Gp-Engine Electronic
| 12***74 | Screw-Pan Head; (8-32x9.52-mm) | 1 |
| 13***26 | Washer; (4.52x8.28x0.76-mm Thk) | 1 |
| 15***72 | Control Group-Engine Electronic | 1 |
339-9861 Conversion Gp-Electrical
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 0 |
| 10***04 | Kit-Receptacle; (4-Pin)(Start Switch) | 0 |
| 10***06 | Receptacle Kit; (Includes Wedge And Receptacle Assem.) | 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 |
103-6092 Sensor Gp-Pressure
| 10***08 | Kit; (Connecting Plug) (3 Pin) (Includes Plug As And Wedge) | 1 |
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 10***92 | Sensor Group-Pressure; -Filtered Oil, Unfiltered Oil | 1 |
194-6724 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 19***26 | Harness As-Sensor; (16-18 Ga Wire)(Engine Oil Temperature) | 3 |
| 19***24 | Sensor Group-Pressure; -Air Inlet Manifold | 1 |
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 |
161-9925 Sensor Gp-Pressure
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***25 | Sensor Group-Pressure; -Turbocharger Inlet | 1 |
167-1709 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***09 | Sensor Group-Pressure; -Injection Actuation Oil | 1 |
| 9X***13 | Sleeve (Order By cm)(Use As Required) | 0 |
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 |
161-9931 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 |
103-6093 Sensor Gp-Pressure
| 10***93 | Sensor Group-Pressure; -Turbocharger Inlet-Atmospheric, Crankcase | 1 |
| 15***89 | Tube; (3cm) | 0 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
194-6722 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 |
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 |
100-4417 Switch Gp-Flow
| 10***17 | Switch Group-Flow; -Engine Coolant | 1 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 4 |
| 3E***71 | Wedge; (Receptacle Lock) (3 Pin) | 1 |
139-2116 Switch Gp-Toggle
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 0 |
| 13***16 | Switch Group-Toggle; (Ground Level Ladder Lamp) | 1 |
| 17***08 | Switch Group-Flow; -Engine Coolant | 1 |
121-4082 Wiring Gp-Engine Electronic
| 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 |
109-0401 Wiring Gp-Unit Injector
| 03***34 | Seal-O-Ring | 1 |
| 10***61 | Clip | 1 |
| 10***01 | Wiring Group-Unit Injector | 1 |
Engine Arrangement
225-0407 Conversion Ar-Engine
| 22***00 | Engine Ar | 1 |
| 22***07 | Conversion Ar-Engine | 1 |
| 33***61 | Conversion Group-Electrical | 1 |
225-0400 Engine Ar
| 10***17 | Switch Group-Flow; -Engine Coolant | 1 |
| 10***19 | Cylinder Head Group | 1 |
| 10***47 | Camshaft Group | 1 |
352-8476 Installation Gp-Engine
| 12***40 | Bracket | 1 |
| 12***96 | Tube | 1 |
| 2S***53 | Clip; (34.92mm Id) | 1 |
Fuel System
112-9775 Control Gp-Governor
| 11***75 | Control Group-Governor; -Accelerator | 1 |
| 13***50 | Plate As | 1 |
| 17***02 | Sensor Group-Position; -Accelerator Control | 1 |
162-0148 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 |
125-3428 Drive Gp-Unit Inj Hyd Pump
| 11***35 | Pin | 1 |
| 12***28 | Drive Group-Unit Inj Hydraulic Pump | 1 |
| 16***26 | Sensor Group-Pressure; -Atmospheric Air, Turbo Inlet | 1 |
125-3427 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 |
180-6649 Drive Gp-Unit Inj Hyd Pump
| 03***01 | Bolt; --To Reverse Shaft Bearing Retainer | 2 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 12***40 | Plate | 1 |
232-1168 Injector Gp-Fuel
| 11***98 | Adapter-Injection | 1 |
| 11***22 | Seal-Rectangular | 1 |
| 13***69 | Bolt-Socket Head | 2 |
198-7912 Injector Gp-Fuel
| 11***98 | Adapter-Injection | 1 |
| 11***22 | Seal-Rectangular | 1 |
| 13***69 | Bolt-Socket Head | 2 |
232-1183 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 |
129-5251 Lines Gp-Fuel Filter
| 03***33 | Seal-O-Ring; (12.42mm Id) | 4 |
| 09***87 | Tee | 1 |
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
121-4034 Lines Gp-Injector Hyd Pump
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 1 |
| 10***02 | Tube As | 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 |
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 |
134-9405 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***63 | Pump Group-Fuel Transfer | 1 |
225-0567 Pump Gp-Unit Injector Hyd
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 13***52 | Seal-O-Ring | 1 |
| 13***09 | Fitting | 2 |
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 |
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 |
225-0568 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 11***20 | Coupling | 1 |
| 14***50 | Pump Group-Fuel Transfer | 1 |
125-3225 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 11***63 | Pump Group-Fuel Transfer | 1 |
235-2026 Pump Gp-Unit Injector Hyd
| 03***39 | Seal-O-Ring (Id=9.25mm) | 2 |
| 03***42 | Seal-O-Ring; (11.89mm Id) | 3 |
| 13***05 | Gasket-Housing | 1 |
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 |
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 |
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 |
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 |
102-7535 Valve Gp-Check
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 10***35 | Valve Group-Check; -Fuel Return Port | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 1 |
282-1915 Valve Gp-Check -Fuel
| 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 |
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 |
129-5246 Filter Gp-Engine Oil
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 5 |
| 12***46 | Filter Group-Engine Oil | 1 |
| 1R***08 | Filter As-Engine Oil; (Advanced Efficiency)(High Efficiency) | 2 |
129-5245 Lines Gp-Engine Oil
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 3 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 1 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 3 |
129-5250 Lines Gp-Turbocharger Oil
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 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 | 2 |
116-1980 Pump Gp-Engine Oil
| 10***82 | Shaft As-Pump Drive | 1 |
| 10***73 | Shaft As-Idler | 1 |
| 11***79 | Body As-Oil Pump | 1 |
Operator Station
155-6006 Tachometer Gp
| 15***06 | Tachometer Group | 1 |
| 3L***87 | Lockwasher 7.24mm(.285in.)O.D.; (3.7x7.24x.48mm Thk) | 4 |
| 4B***24 | Washer; (3.9x9.6x1.2-mm Thk) | 4 |
Service Equipment And Supplies
6l-4502 Chart-Plate & Film
| 11***52 | Plate & Film Group; -Engine Information | 1 |
| 17***75 | Film-Information; (Engine Wiring Connection) | 2 |
| 3N***90 | Plate Serial Number; On R.H. Rear Bank Of Cylinder Block As Viewed From Rear Of Engine | 1 |
142-9920 Plate & Film Gp
| 14***20 | Plate & Film Group | 1 |
| 3N***90 | Plate Serial Number; On R.H. Rear Bank Of Cylinder Block As Viewed From Rear Of Engine | 1 |
769C serial number reference
Locate the ID plate (data plate or tag) on the machine outer frame. The serial number prefix consists of the first three alphanumeric characters of the Product Identification Number (PIN).
| Prefix | Identifies | Notes |
|---|---|---|
| 01X | 769C Off-Highway Truck | Identified on 769C units equipped with the 3408 engine series (18.0-liter, turbocharged V8 diesel). Serial examples in the 01X05000-01X06000 range correspond to early 1990s production (e.g., 1990 and 1994 models). |
Frequently asked questions
What engine powers the Caterpillar 769C?
The 769C is equipped with a twin-turbocharged Caterpillar 3408 engine, featuring 8 cylinders and an 18.0-liter displacement.
What is the total operating weight of the machine?
The empty weight of the 769C is approximately 30,675 kg (67,626.8 lb), while the fully loaded weight reaches 67,586 kg (149,001.7 lb).
What model replaced the Caterpillar 769C?
The Caterpillar 769D is a recognized successor in the off-highway truck lineup, offering updated technology and performance for haulage operations.
What 769C owners discuss
What are the primary engine specifications for the Caterpillar 769C?
The 769C is powered by a 18.0-liter, turbocharged V8 diesel engine, specifically the Cat 3408 series. Some configurations or specialized units may utilize the 3408E variant.
How does the powertrain reliability of the 769C compare to the 769D model?
The 769C is considered highly reliable and simple. Unlike the 769D, the 769C does not suffer from injector-related issues.
What transmission technology is used in the Caterpillar 769C?
The machine utilizes an electronically controlled power shift transmission.
What common mechanical failure should be inspected on a used 769C frame?
Inspect the chassis thoroughly for structural integrity; some units have been found with badly broken frames. Additionally, check the dump body for liner condition and heavy wear.
What are the recommended fluid types for maintaining Caterpillar heavy equipment?
For hydraulic systems, use Cat HYDO Advanced. For diesel engines, use Cat DEO (Diesel Engine Oil) or DEO-ULS. For transmission maintenance, use TDTO (Transmission/Drive Train Oil).
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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