Vacuum Check Valve HVAC: Service and Repair

Fig. 29 Vacuum Check Valve - Diesel Engine:

REMOVAL
1. Remove the clamp from the vacuum supply line connector and unplug the connector from the vacuum check valve.
2. Unscrew the check valve and nipple unit from the engine vacuum pump.

INSTALLATION
1. Screw the check valve and nipple unit into the engine vacuum pump. Tighten the check valve and nipple unit to 24 Nm (18 ft. lbs.).
2. Plug in the connector to the vacuum check valve and install the clamp from the vacuum supply line connector.