Part of the Case Repair Manuals.
Wrenching on a Case 621C, 721C, or 921C loader? This 760-page Case service manual PDF (OEM #7-13502) walks you through every system on these wheel loaders, from engine and fuel to steering, power train, brakes, hydraulics, and mounted equipment. Inside: a full troubleshooting section for transmission, brake, and hydraulic pressure checks, exploded views for teardown work, error code references for the Information and Diagnostic Center, and factory torque tables right up front. You get step-by-step procedures for the loader control valve, brake accumulators, ride control, even cab glass installation. Torque 1/2-inch Grade 5 hardware to 80 to 96 pound feet, and set new AC belt tension at 45 kg (100 pounds). No more chasing pressure problems with borrowed specs. Bookmarked and text-searchable; jump straight to any section or type in the spec you need.
Other edition of this manual
What's Inside This Case 921C, 621C, 721C Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-20 | Section Index - General (Standard Torque Specifications, Fluids and Lubricants, Loctite Product Chart) |
| Engines | 23-30 | Engine Removal, Radiator Removal, Stall Test |
| Fuel System | 37-38 | Fuel System Repair, Cummins Engine Service Center |
| Electrical | 39-64 | Section Index - Electrical (Removal and Installation of Starter and Alternator, Electrical Specifications and Troubleshooting, Batteries, Starter and Starter Solenoid, Information and Diagnostic Center, Alternator) |
| Steering | 65-118 | Section Index - Steering (Removal and Installation of Steering Components, Steering Specifications, Pressure Checks, And Troubleshooting, Steering Control Valve, Steering Priority Valve, Steering Cylinders, Center Pivot) |
| Power Train | 119-294 | Section Index - Power Train (Removal and Installation of Power Train Components, Transmission Specifications, Pressure Checks, And Troubleshooting, Transmission, 621C Front and Rear Axle - 721C Rear Axle, 721C Front Axle, Drive Shaft, Center Bearing, And Universal Joints, Wheels and Tires, Transmission Control Valve) |
| Brakes | 447-488 | Section Index - Brakes (Removal and Installation of Brake Components, Hydraulic Brake Troubleshooting, Brake Accumulators, Brake Actuator Valve, Brake Accumulator Valve, Parking Brake) |
| Hydraulics | 489-642 | Section Index - Hydraulics (Removal and Installation of Hydraulic Components, Hydraulic Specifications, Troubleshooting, And Pressure Checks, Cleaning the Hydraulic System, Hydraulic Pump, Loader Control Valve, Cylinders, Remote Control Valves, Combination Valve, Accumulator for Ride Control, Solenoid Valve and Accumulator Valve for Ride Control) |
| Mounted Equipment | 649-760 | Section Index - Mounted Equipment (Pedals and Levers, Air Conditioning Troubleshooting and System Checks, Air Conditioner System Service, Removal and Installation of Air Conditioning Components, Air Conditioning Compressor and Clutch, Loader, ROPS Cab and ROPS Canopy, Cab Glass Installation, Hydraulic Schematic Foldout and Electrical Schematic Foldout) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Grade 5 Bolts, Nuts, and Studs (1/4 inch) | 108 to 132 Pound Inches | p. 8 |
| Grade 5 Bolts, Nuts, and Studs (5/16 inch) | 204 to 252 Pound Inches | p. 8 |
| Air conditioning drive belt tension (New Belt) | 45 kg (100 pounds) | p. 25 |
| Air conditioning drive belt tension (Used Belt) | 41 kg (90 pounds) | p. 25 |
| Engine Oil Pressure Sender Resistance at 1 Bar | 178 ohms | p. 51 |
| Engine Oil Pressure Sender Resistance at 3 Bar | 90 ohms | p. 51 |
| Coolant and Hydraulic Temperature Sender Resistance at 20°C (68°F) | 3521 ohms | p. 51 |
| Coolant and Hydraulic Temperature Sender Resistance at 105°C (221°F) | 154 ohms | p. 51 |
| Hydraulic Filter Restriction Switch closing setpoint | 310 kPa (45 psi) | p. 51 |
| Fuel Solenoid Resistance (pull in) | 0.82 ohms | p. 51 |
| Fuel Solenoid Resistance (hold in) | 11.3 ohms | p. 51 |
| Air Filter Restriction Switch closing setpoint | 6.4 kPa (0.928 psi) | p. 51 |
