Vacuum Dump Valve Test

1. Disconnect vacuum hose (white stripe) from servo that leads to dump valve.
2. Connect a hand vacuum pump 021-00037, or equivalent, to hose and draw vacuum. If a vacuum can not be obtained, either hose or dump valve are leaking, and should be replaced.
3. Depress brake pedal, vacuum should be released. If vacuum is not released, adjust or replace dump valve.