Vacuum Pump: Service and Repair

WM 477619 Removing and installing vacuum pump

Technical values





Preliminary work

1. Disassemble plenum panel (remove cross panel). For details, see -> 508119 Removing and installing cross panel (disassembling plenum panel) Service and Repair

Removing vacuum pump





Vacuum pump (mechanical)

The vacuum pump -1- is fitted at the rear of the right cylinder head on the V-engine.





Vacuum pump





1. Depending on the equipment variant, pull off vacuum hose at the vacuum pump connection piece. Carefully press secondary-air hoses aside.
2. Remove vacuum pump.
2.1. Detach and remove the vacuum pump -1-.





Removing vacuum pump (mechanical)

Remove the vacuum pump -1- by unscrewing the screws -2-. Turn the vacuum pump to the side and guide it past the fuel low-pressure line.

Installing vacuum pump





Vacuum pump





1. Replace sealing rings -2, 3- on vacuum pump -1-.





Replacing sealing rings on vacuum pump

Carefully loosen and lever off the sealing rings -2, 3- with a small screwdriver. Clean contact surface of sealing rings -2, 3- and fit new sealing rings -2, 3-.
2. Install vacuum pump.
2.1. Clean mounting point before installation.
2.2. Fit and secure the vacuum pump -1-.





Installing vacuum pump (mechanical)

Align driver for vacuum pump -1- and fit the vacuum pump -1-. Screw in and tighten screws -2-.

3. Connect lines and hoses.

Subsequent work

1. Assemble plenum panel (install cross panel). For details, see -> 508119 Removing and installing cross panel (disassembling plenum panel) Service and Repair
2. Check the engine-oil level and top up if necessary.