Check Valves

Fig. 36a Testing Check Valve:

1. Remove both check valves from their vacuum lines.
2. Blow air from side A through side B. Air should pass without resistance. Fig. 36a
3. Blow air from side B through side A. Air should NOT pass.
4. Perform steps 2 and 3 on the other check valve.
5. If a problem is found, replace the check valve(s).
6. Reinstall the check valves in their vacuum lines.