11 52 020 Removing and installing or replacing fan coupling (M73)

CAUTION: Left-hand threads.
Lock belt pulley in position using special tool 11 5 050.
Unfasten cap nut with special tool 115 040. Remove fan wheel with fan coupling from water pump.

Fig 1: Removing Fan Wheel With Fan Coupling From Water Pump

Installation:

For tightening torque, refer to ENGINE - TIGHTENING TORQUES .

NOTE: Tightening torque of 40 Nm when using special tool 11 5 040 is equivalent to 30 Nm on torque wrench scale.

Fig 2: Identifying Torque Wrench

Unfasten screws and detach fan from fan coupling.

Fig 3: Detaching Fan From Fan Coupling