Vehicle System Testing and Adjusting 40
Problem: Brake will not make application.
Probable Cause:
1. Leakage or low fluid level.
2. Lining surface looks like glass (glazed), or worn.
3. Oil or brake fluid is on the lining.
4. Air in the brake hydraulic system.
5. Defective master cylinder.
6. Linkage is not in correct adjustment, or is bent.
Problem: Not braking evenly, or rough feeling of
braking (chatter).
Probable Cause:
1. Lining surface looks like glass (glazed), or worn.
2. Oil or brake fluid is on the lining.
3. Defective contact between the lining and drum.
4. Loose lining.
5. Brake drum out of round.
6. Loose wheel bearing.
7. Defective wheel cylinder.
Parking Brake
Problem: Brake will not make application.
Probable Cause:
1. Parking brake assembly out of adjustment.
2. Parking brake control cable out of adjustment.
3. Worn brake band.
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