Compressor Clutch: Service and Repair

Removing And Installing The Magnetic Coupling

Removal
1. Use a standard strap wrench to securely hold the pressure plate, and undo the fastening screw.







2. Screw a screw M8 into the thread of the pressure plate until the pressure plate can be removed manually. Remove the spacer washers.
3. Use standard Seeger circlip ring pliers to remove the Seeger circlip ring. Manually remove the belt pulley.
4. Unscrew the cable of the magnetic coil from the compressor housing. Remove the Seeger circlip ring. Remove the magnetic coil from the compressor housing.

Installation
1. Place the magnetic coil on the compressor housing. The locking pin must engage in the locking hole.







2. Install the Seeger circlip ring. The slanted surface (arrow) of the Seeger circlip ring faces upwards (to the fastening screw).







3. Tighten the pressure plate fastening screw. Tightening torque: 14 Nm (10 ftlb)


Check the air gap of the magnet coupling
1. Check the air gap between the pressure plate and belt pulley with a depth gauge.







2. Place a rule on the outer edge of the belt pulley. Use a depth gauge to measure up to the pressure plate. Apply battery voltage to the magnetic coupling and measure the distance (air gap) to the attracted pressure plate. Always measure at at least three points on the pressure plate in order to obtain a mean value. Distance: 0.5 mm ± 0.15 mm
3. If the air gap is not in the tolerance range, it must be adjusted with the aid of the spacer washers.