Air Bypass Valve: Testing and Inspection

Checking The Bypass Valve (B235R, B205L/R)







1. Disconnect the vacuum hose from the bypass valve.
2. Connect 30 14 883 Pressure/vacuum pump and create a negative pressure in the valve.
3. Make sure the diaphragm is undamaged. If it is, it will not hold the vacuum.







4. Repeat steps 2 and 3, this time creating positive pressure.
5. Disconnect the pump.
6. Connect the vacuum hose.