397819 Removing and Installing Servo Motor on Transfer Gear

WM 397819 Removing and installing servo motor on transfer gear

Technical values





Removing servo motor on transfer gear





Overview of servo motor

1. Before starting to work on the servo motor for the transfer gear, engage the Low Range off-road driving programme.
2. Remove heat protection from cable plugs on servo motor.





Heat protection on servo motor for transfer gear

3. Disconnect Low Range cable plug -arrow- on the servo motor and loosen cable holder -A-.





Low Range cable plug

4. Pull centre-differential lock cable plug -arrow- off the servo motor.





Centre-differential lock cable plug

5. Unscrew servo motor screws on the transfer gear.





Threaded joint securing servo motor

6. Remove servo motor and support.

Installing servo motor on transfer gear





Overview of servo motor

CAUTION

Servo motor not fitted correctly

- Risk of damage to servo motor electronics
- Servo motor is sluggish

-> Fit servo motor by hand.
-> Do not use impact tools or strikers, e.g. a hammer.

Information

- If a new servo motor is to be installed, it will be supplied in Low Range setting, off-road driving programme.

- If a new servo motor is installed, the transfer gear control unit must be replaced. => 391319 Removing and installing transfer gear control unit

1. Connect the servo motor to the shaft on the transfer gear. Position the cut-out on the shaft -right inset- in line with the servo motor -left inset-.





Positioning servo motor

2. Screw in servo motor screws -arrows- on the transfer gear. => Tightening torque: 27 Nm (20 ftlb.)
3. Screw in screws for servo motor support -arrows- on the transfer gear. => Tightening torque: 10 Nm (7.5 ftlb.)





Threaded joint securing servo motor

4. Connect centre-differential lock cable plug -2- , Low Range -1- and secure cable holder.





Cable plug for servo motor

5. Fit heat protection to the cable plugs on the servo motor.





Heat protection on servo motor for transfer gear

Subsequent work for servo motor

Information

- If a new servo motor is to be installed, it will be supplied in Low Range setting, off-road driving programme.

- If a new servo motor is installed, the transfer gear control unit must be replaced. => 391319 Removing and installing transfer gear control unit

1. Install a new transfer gear control unit. => 391319 Removing and installing transfer gear control unit