769D Off-Highway Truck and 771D Quarry Truck Caterpillar

Ensure that all safety information, warnings, and instructions are read and understood before any operation or any maintenance procedures are performed.

The user is responsible for the performance of maintenance, including all adjustments, the use of proper lubricants, fluids, filters, and the replacement of components due to normal wear and aging. Failure to adhere to proper maintenance intervals and procedures may result in diminished performance of the product and/or accelerated wear of components.

Use mileage, fuel consumption, service hours, or calendar time, WHICH EVER OCCURS FIRST, in order to determine the maintenance intervals. Products that operate in severe operating conditions may require more frequent maintenance.

Note: Before each consecutive interval is performed, all maintenance from the previous interval must be performed.

When Required

Air Conditioner Filter - Clean
Battery - Recycle
Battery or Battery Cable - Inspect/Replace
Cab Air Filter - Clean/Replace
Circuit Breakers - Reset
Engine Air Filter Primary Element - Clean/Replace
Engine Air Filter Secondary Element - Replace
Engine Air Precleaner - Clean
Ether Starting Aid Cylinder - Replace
Frame and Body - Inspect
Fuses - Replace
Oil Filter - Inspect
Screen (Brake Oil Cooler) - Clean
Screen (Hoist and Brake Tank) - Inspect/Clean/Replace
Screen (Torque Converter) - Clean
Traction Control System (TCS) - Test
Window Washer Bottle - Fill
Window Wiper - Inspect/Replace
Windows - Clean

Initial 8 Service Hours

Oil Filter (Parking Brake Release) - Replace
Oil Filter (Power Train) - Replace
Oil Filter (Steering) - Replace

Every 10 Service Hours or Daily

Air Tank Moisture and Sediment - Drain
Air Tank Moisture and Sediment - Drain
Backup Alarm - Test
Brakes, Indicators and Gauges - Test
Braking System - Test
Cooling System Coolant Level - Check
Engine Oil Level - Check
Fuel System Water Separator - Drain
Fuel Tank Water and Sediment - Drain
Hoist and Brake Tank Oil Level - Check
Seat Belt - Inspect
Secondary Steering - Test
Steering System Oil Level - Check
Steering System Oil Level - Check
Torque Converter and Transmission Oil Level - Check

Initial 50 Service Hours

Oil Filter (Steering) - Replace

Every 50 Service Hours or Weekly

Body Pivot Bearings - Lubricate
Front Suspension Cylinder Rods - Lubricate
Hoist Cylinder Bearings - Lubricate
Magnetic Plug (Differential) - Check
Magnetic Plug (Wheels) - Check
Rear Axle A-Frame Bearing - Lubricate
Rear Axle Housing Lateral Control Rod Bearings - Lubricate
Rear Suspension Cylinder Bearings - Lubricate
Steering Cylinder Bearings - Lubricate
Steering Tie Rod and Pin Bearings - Lubricate

Initial 250 Service Hours (or at first oil change)

Engine Valve Lash and Bridge - Check
Engine Valve Rotators - Inspect
Frame and Body Support Pads - Clean/Inspect

Every 250 Service Hours

Engine Oil Sample - Obtain

Every 250 Service Hours or Monthly

Air Conditioner Filter - Clean
Air Dryer - Check
Air Dryer - Check
Belts - Inspect/Adjust/Replace
Breather (Air/Hydraulic Cylinder) - Replace
Breather (Air/Hydraulic Cylinder) - Replace
Cab Air Filter - Clean/Replace
Differential and Final Drive Oil Level - Check
Drive Shaft Slip Joint - Lubricate
Engine Oil and Filter - Change
Fan Drive Bearing and Belt Adjusting Pulley - Lubricate
Front Wheel Oil - Inspect
Front Wheel Oil Level - Check
Tire Inflation - Check

Initial 500 Hours (for New Systems, Refilled Systems, and Converted Systems)

Cooling System Coolant Sample (Level 2) - Obtain

Every 500 Service Hours

Differential and Final Drive Oil Sample - Obtain
Front Wheel Oil Sample - Obtain
Hoist and Brake Tank Oil Sample - Obtain
Steering System Oil Sample - Obtain
Torque Converter and Transmission Oil Sample - Obtain

Every 500 Service Hours or 3 Months

Breather (Hoist and Brake Tank) - Replace
Breather (Torque Converter and Transmission) - Replace
Cooling System Coolant Sample (Level 1) - Obtain
Differential and Final Drive Oil - Inspect
Engine Crankcase Breather - Clean
Frame - Clean/Inspect
Front Wheel Oil - Change
Fuel System - Prime
Fuel System - Prime
(INACTIVE) Fuel System Water Separator Element - Replace (INACTIVE)
Fuel System Secondary Filter - Replace
Fuel Tank Cap and Strainer - Clean
Oil Filter (Parking Brake Release) - Replace
Oil Filter (Power Train) - Replace
Oil Filter (Steering Pump Case Drain) - Replace
Oil Filter (Steering) - Replace
Oil Filter (Steering) - Replace
Screen (Transmission) - Clean
Suspension Cylinder - Check

Every 1000 Service Hours or 6 Months

Air Dryer Desiccant - Replace
Air Dryer Desiccant - Replace
Frame and Body Support Pads - Clean/Inspect
Rollover Protective Structure (ROPS) - Inspect
Service Brakes - Inspect
Steering Linkage - Inspect
Steering System Oil - Change
Steering System Oil - Change
Torque Converter and Transmission Oil - Change

Every 2000 Service Hours or 1 Year

Breather (Differential and Final Drive) - Replace
Differential Thrust Pin Clearance - Check
Differential and Final Drive Oil - Change

Every Year

Cooling System Coolant Sample (Level 2) - Obtain
Refrigerant Dryer - Replace

Every 3000 Service Hours or 2 Years

Cooling System Coolant Extender (ELC) - Add
Cooling System Pressure Cap - Clean/Replace
Engine Valve Lash and Bridge - Check
Engine Valve Rotators - Inspect
Radiator Core - Clean

Every 3 Years

Seat Belt - Replace

Every 4000 Service Hours or 1 Year

Differential and Final Drive Oil - Change

Every 6000 Service Hours or 4 Years

Cooling System Coolant (ELC) - Change
Cooling System Relief Valve - Clean
Cooling System Water Temperature Regulator - Replace
Engine Water Pump - Inspect