Drive Belt: Service and Repair

WM 137819 Removing and installing drive belt

Preliminary work

1. Put protective covers in the passenger compartment.
2. Remove rear wall cover.
-> 555919 Removing and installing rear wall cover Service and Repair.

Removal

Removing drive belt

Drive belt routing (view on removed engine):





Drive belt on engine (view with engine removed)





NOTICE

Drive belt removed incorrectly

- Risk of damage to drive belt

-> Only remove the drive belt when it is cold.
-> Replace damaged drive belt.

Information

- Mark running direction of drive belt with a coloured pen.

- Even minor damage means that the drive belt must be replaced (even if the maintenance interval has not expired).

- If the drive belt has to be replaced (change interval), it can be cut to facilitate removal.

1. Slacken the drive belt.
1.1. Fit a ring wrench (a/f 30) -2- on the hexagon -1- on the tensioner, turn it clockwise as far as it will go and hold it at that position.





Relieving drive belt

1.2. Remove drive belt from the pulley on the generator -arrow-.
1.3. Carefully allow the tensioning roller to slide back to its original position.
2. Feed the drive belt -1- out between the engine bracket and vibration damper -2-.





Drive belt on vibration damper

3. Feed out the drive belt on the various pulleys.





Drive belt on pulley





4. Take off the drive belt -1-.
4.1. If you intend to re-install the drive belt, check it carefully for signs of damage on both running tracks.





Drive belt through maintenance opening

Information

- Check for foreign objects in the grooves of the pulley.

5. Check pulley for damage.

Installation

Installing drive belt

Drive belt routing (view on removed engine):





Drive belt routing





1. Guide in the drive belt with the flat side between the engine bracket and vibration damper and position it on the grooves.





Drive belt on vibration damper

2. Fit the drive belt onto the other pulleys in accordance with the belt threading course.





Drive belt on pulley





2.1. Fit drive belt on the tensioning roller
3. Fit drive belt.
3.1. Fit a ring wrench (a/f 30) -2- on the hexagon -1- on the tensioner, turn it clockwise as far as it will go and hold it at that position.
3.2. Slide the drive belt onto the tensioning roller.
3.3. Let the tensioner slide back slowly into tensioning position (anti-clockwise).





Relieving drive belt

4. Check that all pulleys and the tensioning roller are installed at the correct position.
4.1. To do this, turn the belt tensioner clockwise as far as it will go using the ring wrench -1- and hold it at this position.
4.2. Guide the drive belt clockwise over the pulley -2- for the air conditioning compressor with your hand.





Checking installation position of drive belt

Subsequent work

1. Install rear wall cover.
-> 555919 Removing and installing rear wall cover Service and Repair.
2. Remove protective covers in the passenger compartment.