Dakota Quad Cab 2WD V8-4.7L VIN N (2001)
Vacuum Brake Booster Check Valve: Testing and Inspection
POWER BOOSTER CHECK VALVE TEST
(1) Disconnect vacuum hose from check valve.
(2) Remove check valve and valve seal from booster.
(3) Use a hand operated vacuum pump for test.
(4) Apply 15 - 20 inches vacuum at large end of check valve.
(5) Vacuum should hold steady. If gauge on pump indicates vacuum loss, check valve is faulty and should be replaced.
