TCM FD35C9, Workshop Manual

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4-4
4.6 STEERING WHEEL
Problem Probable cause Remedy
1. Hard steering
Control valve defective Replace control valve.
Relief valve pressure setting is low Adjust.
King pin bearing damaged Replace.
Wheel alignment improper Correct.
Low tire inflation pressure Adjust inflation pressure.
Steering gear box defective Replace.
2. Steering wheel
malfunctioning
Control valve flow divider defective Repair or replace.
Steering gear box defective Repair or replace.
Steering cylinder piston seal damaged Replace.
3. Too large play of
steering wheel
Worn ball joints on steering cylinder, knuckle
arm, center arm, or drag link
Replace.
Steering gear box defective Repair or replace.
4. The truck wanders
Wheel alignment improper Correct.
Knuckle bearing defective Replace.
Rear axle deformed Correct or replace.
Tire inflation pressure improper Adjust.
Loose ball joints on steering cylinder, knuckle
arm, and center arm
Replace.
4.7 STEERING AXLE
Problem Probable cause Remedy
1. Rear wheel hub is loose
Loose knuckle Shim-adjust.
King pin bearing worn or damaged Replace.
Center arm pin bearing worn or damaged Replace.
Hub bearing loose Retighten lock nut.
Hub bearing damaged Replace.
2. Noisy while truck
makes turns
King pin bearing worn or damaged Replace.
Center arm pin bearing worn or damaged Replace.
Axle support pin not greased properly Apply grease.
Misalignment Adjust.
3. Hard steering
King pin bearing worn or damaged Replace.
Center arm pin bearing worn or damaged Replace.
Misalignment Adjust.
Steering wheel defective See “4.6 STEERING WHEEL.”
Low tire inflation pressure Adjust to specified pressure.
4. Oil leakage Hub oil seal defective Replace.