Somerset Regal L4-151 2.5L (1985)
Vacuum Brake Booster: Testing and Inspection
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.
