Case 621C, 721C Wheel Loader Service Manual

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Covers: Case 621C, 721C Wheel Loader
Pages: 861
Format: PDF
File size: 173mb
Compatibility: Windows/Mac computers

This service manual contains the necessary technical information to service and repair Case 621C, 721C Loaders. Includes detailed Case 621B, 721B Wheel Loader specifications, torques, removal and installation procedures, troubleshooting and much more. View the Case 621B, 721B Wheel Loader Service Repair Manual on your computer or print off pages as needed.

Engine repair manual, parts manual and operator’s manual sold separately (6-590 or 6-830).

Topics in the Case 621C, 721C Wheel Loader Service Manual:

General Information
Standard Torque Specifications
Fluids and Lubricants
Loctite Product Chart

Engine*
Description
Engine and Radiator Removal and Installation
Stall Tests
*For Engine/Fuel Repair, See the Engine Service Manual (6-590 or 6-830)

Electrical
Removal and Installation of Starter and Alternator
Electrical Specifications and Troubleshooting
Batteries
Starter and Starter Solenoid
Information and Diagnostic Center
Alternator

Steering
Removal and Installation of Steering Components
Steering Specifications, Pressure Checks, and Troubleshooting
Steering Priority Valve
Steering Control Valve
Steering Cylinders
Center Pivot

Power Train
Transmission Specifications, Pressure Checks and Troubleshooting
Transmission Service
Front and Rear Axle
Drive Shaft, Center Bearing, and Universal Joints
Wheels and Tires
Transmission Control Valve

Brakes
Removal and Installation of Brake Components
Hydraulic Brake Troubleshooting
Brake Accumulators
Brake Actuator Valve
Brake Accumulator Valve
Parking Brake

Hydraulics
Removal and Installation of Hydraulic Components
Hydraulic Specifications, Pressure Checks and Troubleshooting
Hydraulic Pump
Cleaning the Hydraulic System
Loader Control Valve
Cylinders
Remote Control Valves
Coupler Lock Valve
Combination Valve
Accumulator for Ride Control
Solenoid Valve and Accumulator Valve for Ride Control

Mounted Equipment
Pedals and Levers
Air Conditioning Troubleshooting, and System Checks
Air Conditioner System Service
Removal and Installation of Air Conditioning System Components
Air Conditioning Compressor and Clutch For Systems with HFC-134a Refrigerant
Loader
ROPS Cab and ROPS Canopy
Cab Glass Installation

Hydraulic Schematic (Diagram)
Electrical Wiring Schematic (Diagram)

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Engine oil
Capacity with filter change – 621 C ………………………………………………………………. 15.1 litres (16 U.S. quarts)
721 C ……………………………………………………………… 20.8 litres (22 U.S. quarts)
Type of oil. ………………………………………… Case No. 1 engine oil – see engine oil recommendations on page 3
Engine cooling system
Capacity- 621C ………………………………………………………………………………………. 26.5 litres (28 U.S. quarts)
721C ………………………………………………………………………………………. 32.1 litres (34 U.S. quarts)
Type of coolant …………. Ethylene glycol and water mixed for lowest ambient temperature (at least 50/50 mix)
Fuel tank
Capacity – 621 C ……………………………………………………………………………………… 193 litres (51 U.S. gallons)
721 C ……………………………………………………………………………………. 204 litres (53.9 U.S. gallons)
Type of fuel ………………………………………………………………………….. See Diesel fuel specifications on page 4
Hydraulic system
Hydraulic reservoir refill capacity – 621 C and 721 C …………………………………….. 90.1 litres (95.2 U.S. quarts)
Total system capacity – 621C and 721C ………………………………………………………… 153.1 litres (40.5 gallons)
Type of oil …………………………………………………………………………………………………… MS-1209 Hy-Tran Ultra

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