BASIC BRAKE SYSTEM
(1) Run the engine for one or two minutes, and then stop it. If
the pedal depresses fully the first time but gradually
(2) With the engine stopped, step on the brake pedal several
times. Then step on the brake pedal and start the engine.
(3) With the engine running, step on the brake pedal and
then stop the engine. Hold the pedal depressed for 30
2. If the above three tests are okay, the booster is OK. If one of
the above three tests is not okay, the check valve, vacuum
.), vacuum hose for leaks, high volume engine
vacuum applied to booster. Repair or replace as necessary.
CHECK VALVE OPERATION CHECK
The check valve should not be removed from the vacuum