Vacuum Brake Booster Check Valve: Service and Repair

REPLACEMENT





Refer to the illustration when servicing.

CAUTION: When installing vacuum hoses, pay attention to the following points.
- Do not apply any oil or lubricants to vacuum hose and check valve.





- Insert vacuum tube into vacuum hose as shown.





- Install check valve, paying attention to its direction.

INSPECTION

Hoses And Connectors
- Check vacuum lines, connections and check valve for airtightness, improper attachment chafing and deterioration.

Check Valve





- Check vacuum with a vacuum pump.
- Connect to booster side: Vacuum should exist.
- Connect to engine side: Vacuum should not exist.