27 10 730 Replacing transfer box control unit (longitudinal torque module) (ATC 450)
| IMPORTANT | Before and after replacement, execute the "Repair" service function with the BMW diagnosis system. Read and comply with notes on protection against ELECTROSTATIC DISCHARGE (ESD PROTECTION). |
Necessary preliminary tasks
- Disconnect «NEGATIVE BATTERY CABLE»(ref-351441-S30936395632009122100000)
- Remove «CROSS MEMBER»(ref-349801-S20348991582009121000000).
Disconnect connector (1).
Release screws (2) and remove transfer box from control unit (longitudinal torque module) (3).
Tightening torque: 22 Nm
Note. Radial shaft seal of actuator shaft must be replaced as well.
Thread special tool 23 0 490 (puller) into radial shaft seal (1).
Drive out radial shaft seal (1) with impact weight (2).
Scheme 1
Push the assembly sleeve 11 1 380 (holding sleeve) over the actuator shaft.
| IMPORTANT | Non-observance involves a risk of damage to the radial shaft seal. |
Scheme 2
Slide the new radial shaft seal (1) over the assembly sleeve (2) onto the actuator shaft.
Scheme 3
Drive radial shaft seal fully home using special tool 11 1 200 and plastic hammer.
Remove the assembly sleeve.
Scheme 4
After replacement
Carry out PROGRAMMING/ENCODING.