Case 521D Repair Manual [Wheel Loader]


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Factory Complete Repair Manual Case 521D. Like the original factory paper manual. Step by step instructions for service, maintenance, repair, overhaul, tune-up guide you through every service repair procedure.
This service manual is one of the most important tools available to the service technician.

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Models Covered

Case 521D Wheel Loader.

In Content

Section Index – General
Standard Torque Specifications
Fluids and Lubricants
Metric Conversion Chart
Loctite Product Chart
Section Index – Engines
Engine and Radiator Removal and Installation
Engine and Radiator Removal and Installation P.I.N. JEE ) 135501 and Above
Stall Tests
For Engine Repair, See the Engine Service Manual
Fuel System
Section Index – Fuel System
For Fuel System Repair, See the Engine Service Manual
Section Index – Electrical
Removal and Installation of Starter and Alternator
Electrical Specifications and Troubleshooting
Electrical Specifications and Troubleshooting P.I.N. JEEO 135501 and Above
Information and Diagnostic Center
Alternator – 65 Ampere
Alternator – 45 Ampere
Section Index – Steering
Removal and Installation of Steering Components
Steering Specifications, Pressure Checks, and Troublesh noting
Steering Control Valve
Steering Priority Valve
Steering Cylinders
Center Pivot
Auxiliary steering Motor ana Mump
Power Train
Section Index – Power Train
Removal and Installation of Power Train Components
Transmission Specifications, Pressure Checks, and Troubleshooting
Front and Rear Axle
Front and Rear Axle P.I.N. JEE0135501 and Above
Drive Shafts, Center Bearing, and Universal Joints
Wheels and Tires
Transmission Control Valve
Section Index – Brakes
Removal and Installation of Brake Components
Hydraulic Brake Troubleshooting
Brake Accumulators
Parking Brake
NOTE: For parking brake and brake pedal adjustments, see Section 9001.
Section Index – Hydraulics
Removal and Installation of Hydraulic Components
Hydraulic Specifications, Troubleshooting, and Pressure Checks
Cleaning the Hydraulic System
Coupler Solenoid Locking Valve
Pilot Pressure Accumulator and Ride Control Accumulator
Mounted Equipment
Section Index – Mounted Equipment
Pedals and Levers
Air Conditioning Troubleshooting and System Checks For Systems with HFC-134a
Air Conditioner System Service
Removal and Installation of Air Conditioning Components For Systems with
HFC-134a Refrigerant
ROPS Cab and ROPS Canopy
Cab Glass Installation
Electrical Schematic Foldouts and Hydraulic Schematic Foldout
Electrical Schematic Foldouts and Hydraulic Schematic Foldout P.I.N JEE0135501 and Above

Park machine on a level surface; be sure to allow adequate space at side of machine for removal of rear axle. Stop engine. Actuate brake pedal several times to discharge brake accumulators. Put key switch in ON position and move loader control lever back and forth at least 30 times to release any pressure from hydraulic circuit. Note amount of fuel in fuel tank then put key switch in OFF position.
Put articulation lock in LOCKED position.
Remove fuel tank (Steps 24 through 28).
STEP 100
Install wood blocks between rear axle and chassis to prevent rear axle from pivoting.
STEP 101
Remove four bolts (1) and two straps (2). Use a pry bar to disconnect rear drive shaft (3) from rear axle.
STEP 102
Disconnect brake hose (4) from fitting (5). Remove and discard O-ring face seal from fitting.
STEP 103
Using an acceptable hydraulic jack, raise one tire from ground and install an acceptable jack stand under machine. Repeat this step for other tire.
STEP 104
Use an acceptable jack to hold rear axle.
STEP 105
Remove 10 bolts (6) and washers (7) from rear wheels (8). Remove both wheels from rear axle.
STEP 106
At front of trunnion (9), remove two Allen head bolts (10) and washers (11). Remove front cap (12): if necessary use two M12 by 32 mm (1.25 inches) bolts in puller holes (A); tighten bolts evenly to pull cap from axle and trunnion. Remove and discard O-ring (15) from cap. Repeat this step at rear of trunnion except remove and retain shim(s) (14) after removal of rear cap (13). Remove pivot shaft (16) using acceptable sleeve or rod if necessary