Operation and Maintenance Manual 784C and 785C Off-Highway Truck/Tractor

Operation and Maintenance Manual 784C and 785C Off-Highway Truck/Tractor

Maintenance Interval Schedule

SMCS - 1000; 7000

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.

Note: If Cat HYDO Advanced 10 hydraulic oil is used, the hydraulic oil change interval will change. The normal interval of 2000 hours is extended to 3000 hours. S·O·S services may extend the oil change even longer. Consult your Caterpillar dealer for details.

When Required

Air Conditioner Filter - Clean Air Tank - Inspect Automatic Lubrication Reservoir - Fill Battery - Recycle Battery or Battery Cable - Inspect/Replace Brake Oil Cooler Screen - Clean Brake Tank (Makeup) - Clean Cab Air Filter - Clean/Replace Circuit Breakers - Reset Engine Air Filter Primary Element - Clean/Replace Engine Air Filter Primary Element - Clean/Replace Engine Air Filter Secondary Element - Replace Engine Air Filter Service Indicator Screen - Clean/Replace Engine Air Filter Service Indicator Screen - Clean/Replace Engine Air Precleaner - Clean Ether Starting Aid Cylinder - Replace Frame and Body - Inspect Fuel System - Prime Fuel System Primary Filter (Water Separator) - Drain Hoist Screens - Clean Hoist, Torque Converter and Brake Tank Suction Screen - Inspect/Clean/Replace Magnetic Plug (Wheels) - Check Oil Filter - Inspect Rear Axle Housing End Play - Adjust Rim - Inspect Suction Screen (Torque Converter) - Clean Traction Control System (TCS) - Test Transmission Tank Suction Screen - Clean/Inspect/Replace Window - Clean Window Washer Bottle - Fill Window Wiper - Inspect/Replace

Every 10 Service Hours or Daily

Air Tank Moisture and Sediment - Drain Backup Alarm - Test Brakes, Indicators and Gauges - Test Cooling System Coolant Level - Check Cooling System Coolant Level - Check Differential and Final Drive Oil Level - Check Engine Air Filter Service Indicator - Inspect Engine Air Filter Service Indicator - Inspect Engine Oil Level - Check Engine Oil Level - Log Additions Fuel Tank Water and Sediment - Drain Hoist, Torque Converter and Brake Tank Oil Level - Check Seat Belt - Inspect Steering System Oil Level - Check Transmission Tank Oil Level - Check

Initial 50 Service Hours

Parking Brake Release Oil Filter - Replace Rear Axle Oil Filter - Replace Steering System Oil Filter - Replace Torque Converter Oil Filter - Replace Transmission Oil Filter - Replace

Initial 250 Service Hours

Engine Valve Lash and Bridge - Adjust

Every 250 Service Hours or Monthly

Braking System - Test Braking System - Test Fan Drive Bearing and Belt Adjusting Pulley - Lubricate Front Wheel Oil - Inspect Magnetic Plug (Wheels) - 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 Engine Oil Sample - Obtain Front Wheel Oil Sample - Obtain Hoist, Torque Converter and Brake Tank Oil Sample - Obtain Steering System Oil Sample - Obtain Transmission Tank Oil Sample - Obtain

Every 500 Service Hours or 3 Months

Air Conditioner Filter - Clean Air Dryer - Check Air Dryer - Check Air/Hydraulic Cylinder Breather - Clean Automatic Lubrication Reservoir - Fill Belts - Inspect/Adjust/Replace Cab Air Filter - Clean/Replace Cable (Truck Body Retaining) - Inspect Cooling System Coolant Sample (Level 1) - Obtain Differential and Final Drive Oil - Inspect Drive Shaft Slip Joint - Lubricate Engine Crankcase Breather - Clean Engine Oil Filter (Oil Renewal System) - Change Engine Oil and Filter - Change Frame - Clean/Inspect Front Wheel Oil - Change Fuel Filter (Oil Renewal System) - Replace Fuel System Primary Filter (Water Separator) Element - Replace Fuel System Primary Filter - Clean Fuel System Secondary Filter - Replace Fuel Tank Cap and Strainer - Clean Hoist, Torque Converter and Brake Tank Breather - Replace Parking Brake Release Oil Filter - Replace Rear Axle Oil Filter - Replace Secondary Steering - Check Steering System Oil Filter - Replace Suspension Cylinder - Check Torque Converter Oil Filter - Replace Torque Converter Outlet Screen - Replace Transmission Breather - Clean Transmission Magnetic Screen - Clean Transmission Oil Filter - Replace

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 Seat Suspension - Inspect/Lubricate Service Brakes - Inspect Steering Ball Stud - Inspect Steering Linkage - Inspect Transmission Tank Oil - Change

Every 2000 Service Hours or 1 Year

Breather (Fuel Tank) - Replace Differential Thrust Pin Clearance - Check Differential and Final Drive Breather - Replace Differential and Final Drive Oil - Change Front Axle Breather - Replace Hoist, Torque Converter and Brake Tank Oil - Change Rear Axle Housing End Play - Adjust Steering System Oil - Change

Every Year

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

Every 3000 Service Hours or 2 Years

Cooling System Pressure Cap - Clean/Replace Cooling System Pressure Cap - Clean/Replace Cooling System Relief Valve - Clean Cooling System Relief Valve - Clean Radiator Core - Clean

Every 3 Years After Date of Installation or Every 5 Years After Date of Manufacture

Seat Belt - Replace

Every 4000 Service Hours

Engine Valve Lash and Bridge - Adjust

Every 6000 Service Hours or 3 Years

Cooling System Coolant Extender (ELC) - Add Cooling System Coolant Extender (ELC) - Add

Every 6000 Service Hours or 4 Years

Cooling System Water Temperature Regulator - Replace Engine Water Pump - Inspect VIMS Module Battery - Replace VIMS Module Battery - Replace

Every 12 000 Service Hours or 6 Years

Cooling System Coolant (ELC) - Change Cooling System Coolant (ELC) - Change Steering Ball Stud - Replace

Every 15 000 Service Hours

Rim - Inspect

Every 946 350 L (250 000 US gal)of Fuel or 9000 Service Hours

Engine Components - Rebuild/Install Reman

Every 1 892 700 L (500 000 US gal) of Fuel or 18 000 Service Hours