Part of the Case Repair Manuals.
This is the combined Case factory service manual for the 621F and 721F Tier 4 wheel loaders, covering both the full repair procedures and the operator content. It is organized into the standard Case system groups, Engine, Transmission, Four-Wheel Drive, Front and Rear Axles, Brakes, Hydraulic Systems, Steering, Wheels, Cab Climate Control, Electrical Systems, and Platform and Cab. Each group carries specifications, troubleshooting, and step-by-step removal, disassembly, inspection, assembly, and installation procedures for these Tier 4 Final machines, including the powershift transmission, the variable displacement hydraulics, and the engine and transmission control systems, for both the 621F and 721F.
What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | Engine and Crankcase, Air Cleaners and Lines, Engine Lubrication System, Aftercooler, Engine Cooling System, Fan and Drive, Selective Catalytic Reduction (SCR) Exhaust Treatment, Engine Generic Sub-Group (10.AAA) | |
| Transmission | Powershift Transmission, Powershift Transmission External Controls, Powershift Transmission Internal Components | |
| Four-Wheel Drive (4WD) System | Drive Shaft | |
| Front Axle System | Powered Front Axle, Front Bevel Gear Set and Differential, Final Drive Hub, Steering Knuckles, And Shafts | |
| Rear Axle System | Powered Rear Axle, Rear Bevel Gear Set and Differential, Planetary and Final Drives | |
| Brakes and Controls | Hydraulic Service Brakes | |
| Hydraulic Systems | Variable Displacement Pump, Pilot System, Main Control Valve, Auxiliary Hydraulic Valves and Lines, Front Loader Arm Hydraulic System | |
| Steering | Auxiliary Steering | |
| Wheels | Front Wheels | |
| Cab Climate Control | Air Conditioning | |
| Electrical Systems | Electrical System, Fuel Tank System, Engine Cooling System, Engine Control System, Service Brake Electrical System, Parking Brake Electrical System, Hydraulic System Control, Steering Control System, Heating, Ventilation, And Air-Conditioning (HVAC) Control System, Cab Heating, And Air-Conditioning (HVAC) Controls, Harnesses and Connectors, Engine Starting System, Cold Start Aid, Alternator, Battery, External Lighting, External Lighting Switches and Relays, Warning Indicators, Alarms, And Instruments, Loader Arm and Bucket Control System, Cab/Platform Harnesses and Connectors, Cab Controls, Cab Lighting, Wiper/Washer System, Cab Brake Controls, Cab Controls (Lift Arm, Boom, Dipper, Bucket), Selective Catalytic Reduction (SCR) Electrical System, Fault Codes (55.DTC) | |
| Platform, Cab, Bodywork, and Decals | Pneumatically-Adjusted Operator Seat, Cab |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine oil | Case Akcela Engine Oil 15W-40 | |
| Coolant mixture | 50% ethylene glycol / 50% water | |
| Transmission | Powershift with external controls | |
| Drive | Four-wheel drive, powered front and rear axles | |
| Hydraulics | Variable displacement pump with pilot system and main control valve |
