pontiac Workshop Repair Guides

Pontiac Workshop Service and Repair Manuals

Checking Complaints|Page 3172 > < Checking Complaints
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Vacuum Brake Booster: Testing and Inspection
Bendix Diaphragm Type

Hard Pedal Or No Assist

1.

Air cleaner element clogged.

2.

Control valve faulty.

3.

Defective diaphragm.

4.

Worn or distorted reaction plate or levers.

5.

Cracked or broken power piston or levers.

6.

Internal or external leaks.

Brakes Grab

1.

Control valve defective or sticking.

2.

Bind in linkage.

3.

Reaction diaphragm leaking.

4.

Worn or distorted levers or plate.

No Or Slow Release

1.

Pushrod adjustment incorrect.

2.

Linkage binding.

3.

Return spring defective.

Checking Complaints|Page 3172 > < Checking Complaints