Replacing Alternator Drive Belt

11 28 010 Replacing Drive Belt For Alternator (N63)

Special tools required:







IMPORTANT: If contaminated with hydraulic fluid: Replace drive belt.

Installation note:
If the drive belt is to be reused, mark direction of travel and reinstall drive belt in same direction of rotation.







Necessary preliminary work:
- Remove fan cowl.
- Release expansion tank for charge air cooler from mounting and press forwards.
Coolant hoses do not need to be released.







IMPORTANT: Belt tensioner is under high initial spring preload.

Slowly and carefully pre-tension belt tensioner (1) in direction of arrow up to stop.
Secure special tool 11 3 340 in dowel hole (2).
Belt tensioner in installation position.
Remove drive belt.

NOTE: On vehicles which do not have a power steering pump, a deflecting element (3) is fitted in place of the power steering pump.






IMPORTANT: Belt tensioner is under high initial spring preload.

Put on the drive belt.
Remove special tool 11 3 340 from dowel hole (2).
Slowly relieve tension on belt tensioner (1).

Installation note:
Make sure drive belt is in correct installation position.







Assemble engine.