Vacuum Brake Booster Check Valve: Service and Repair

Brake Booster Vacuum Check Valve:

NOTE: Vacuum check valve and grommet can be inspected and/or serviced without removing booster from vehicle.

REMOVE OR DISCONNECT
1. Clamp (31) and vacuum hose (30) from check valve (4).
2. Check valve (4) and grommet (9). Inspect Grommet (9) and vacuum hose (30) for cuts, nicks and excessive wear. Replace grommet (9) or vacuum hose (30) if damaged.

CLEAN
1. All parts in denatured alcohol.
2. DRY with unlubricated compressed air.

INSTALL OR CONNECT
1. Lubricate inner and outer diameters of grommet (9) with thin layer of silicone grease.
2. Grommet (9) and check valve (4).
3. Vacuum hose (30) and clamp (31) to vacuum check valve (4).