Withdrawal
1. Disconnect the hose from the valve (valve mounted on booster).
2. Carefully remove the valve from the booster. Do not dislodge the valve seal.
Examination
3. Check the valve for damage and replace if necessary.
4. The valve can be tested by blowing in both directions. Air should flow through the valve in only one direction - when the valve is purged from the servo amplifier side. Otherwise, the valve must be replaced.
5. Inspect the valve grommet for damage. Replace bushing if necessary.
Installation
6. Verify that the valve grommet is in place.
7. Install the valve on the booster. Be careful not to move or damage the valve seal.
8. Connect a vacuum hose to the valve.
9. Finally, start the engine and check the valve connection to the booster for air leaks.