621F Wheel Tractor-Scraper Caterpillar

Note: All safety information, warnings, and instructions must be read and understood before you perform any operation or any maintenance procedure.

Before each consecutive interval is performed, all of the maintenance requirements from the previous interval must also be performed.

When Required

Auger Hydraulic System Oil Filter - Replace
Battery - Recycle
Battery Electrolyte Level - Check
Battery, Battery Cable or Battery Disconnect Switch - Replace
Circuit Breakers - Reset
Cutting Edges and End Bits - Inspect/Replace
Draft Arm Wear Plates - Check/Adjust
Ejector Carrier Rollers - Check/Adjust
Ejector Guide Rollers - Check/Adjust
Ejector Support Rollers - Check/Adjust
Engine Air Filter Primary Element - Clean/Replace
Engine Air Filter Secondary Element - Replace
Engine Air Precleaner - Clean
Ether Starting Aid Cylinder - Replace
Fuel System - Prime
Fuel System Primary Filter - Clean/Inspect/Replace
Fuses - Replace
Hydraulic Tank Breaker Relief Valve - Clean
Oil Filter - Inspect
Router Bits - Inspect/Replace
Seat - Inspect
Steering Pump Outlet Screen - Clean
Window Washer Reservoir - Fill
Window Wiper - Inspect/Replace
Windows - Clean

Every 10 Service Hours or Daily

Air Tank Moisture and Sediment - Drain
Auger Drive Gear Oil Level - Check
Auger Seal - Inspect/Replace
Backup Alarm - Test
Brakes, Indicators and Gauges - Test
Cooling System Level - Check
Differential and Final Drive Oil Level - Check
Engine Air Filter Service Indicator - Inspect
Engine Oil Level - Check
Fuel Tank Water and Sediment - Drain
Hydraulic Oil Cooler - Clean
Hydraulic System Oil Level - Check
Radiator Core - Clean
Seat Belt - Inspect
Transmission Oil Level - Check
Walk-Around Inspection

Initial 25 Service Hours

Hydraulic System Oil Charge Filter - Replace

Initial 50 Service Hours

Hydraulic System Oil Charge Filter - Replace

Every 50 Service Hours or Weekly

Cab Air Filter - Clean/Replace
Hitch - Lubricate
Tire Inflation - Check

Initial 75 Service Hours

Hydraulic System Oil Charge Filter - Replace

Initial 100 Service Hours

Auger Hydraulic System Oil Filter - Replace

Every 250 Service Hours or Monthly

Air Conditioner - Test
Air Dryer - Check
Auger Drive Gear Breather - Clean
Brake Air System Pressure - Test
Braking System - Test
Coolant Conditioner Element - Replace
Cooling System Coolant Additive (DEAC) - Add
Cooling System Coolant Extender (ELC) - Add
Engine Oil (High Speed) and Oil Filter - Change
Engine Oil Sample - Obtain
Engine Oil and Filter - Change
Fan Drive Bearing and Belt Tightener - Lubricate
Hydraulic System Oil Sample - Obtain
Transmission Oil Sample - Obtain
V-Belts - Inspect/Adjust/Replace
Wheel Bearing Oil Level - Check

Every 500 Service Hours or 3 Months

Auger Bearing Oil Level - Check
Auger Hydraulic System Oil Filter - Replace
Auger Shoes and Cutting Edges - Inspect/Replace
Brake Camshaft Bearing - Lubricate
Differential and Final Drive Oil Sample - Obtain
Engine Crankcase Breather - Clean
Fuel System Primary Filter - Clean/Inspect/Replace
Fuel System Secondary Filter - Replace
Fuel Tank Cap and Strainer - Clean
Hydraulic System Oil Filter - Replace
Hydraulic Tank Breaker Relief Valve - Clean
In-Line Refrigerant Dryer - Check/Replace
Transmission Oil Filter and Magnetic Screen - Replace/Clean

Every 1000 Service Hours or 6 Months

Air Dryer Desiccant - Replace
Brake Air System Warning Horn - Test
Differential and Final Drive Breather - Clean
Rollover Protective Structure (ROPS) - Inspect
Seat Suspension - Lubricate
Suction Screen (Transmission Scavenge) - Clean
Transmission Breather - Clean
Transmission Oil - Change
Wheel Coolant Level - Check
Wheel Coolant Level - Check

Every 2000 Service Hours or 1 Year

Auger Bearing Oil - Change
Auger Drive Gear Oil - Change
Cushion-Hitch Accumulator - Check
Differential Thrust Pin Clearance - Check
Differential and Final Drive Oil - Change
Ejector Carrier Rollers - Check/Adjust
Ejector Carrier Rollers - Inspect/Pack/Replace
Ejector Guide Rollers - Check/Adjust
Ejector Guide Rollers - Inspect/Pack/Replace
Ejector Support Rollers - Check/Adjust
Ejector Support Rollers - Inspect/Pack/Replace
Fuel Injection Timing - Check
Hitch - Inspect
Hydraulic System Oil - Change
In-Line Refrigerant Dryer - Check/Replace
Wheel Bearing Oil - Change

Every 2000 Service Hours or Yearly

Brake Shoes and Drums - Check/Replace
Engine Valve Lash - Check

Every 3000 Service Hours or 2 Years

Cooling System Coolant (DEAC) - Change
Cooling System Pressure Cap - Clean/Replace
Cooling System Relief Valve - Clean
Cooling System Water Temperature Regulator - Replace
Crankshaft Vibration Damper - Inspect

Every 6000 Service Hours or 6 Years

Cooling System Coolant (ELC) - Change