CHECK OPERATION BRAKE VACUUM CHECK VALVE ASSEMBLY
| *a | Hose Side |
| *b | Vacuum Pump Side |
|
Air |
Check that air flows from the hose side to the pump side.
Check that air does not flow from the pump side to the hose side.
If necessary, replace the check valve assembly.
CHECK VACUUM PUMP CASE
Inspect the inside surface of the vacuum pump case for scoring.
If necessary, replace the vacuum pump assembly.