REMOVING AND INSTALLING
TOOTHED DRIVE BELT

Removal:
Remove door complete with baseplate
- see 51 33.

Note:
Place door on a soft surface to avoid
scratching the painted parts.
OR:
Remove the painted outer door panel -
see Group 41.

Remove tensioning roller (1) on the
drive roller.


51 33 000
41 51 000

Unscrew locknut (1) and loosen the
toothed drive belt.

Remove retainer on shaft.
Pull out shaft.
Take roller out of the holder.

Unscrew nuts.
Take off clamp.
Remove the toothed drive belt.

Installation:
Tightening torque = 6 Nm (4.3 ft. lbs.).

Installation:
Install the toothed drive belt.

Insert lower roller in the holder.
Install the shaft.
Install retainer.
Install tensioning roller on the drive
roller at the top.

Mount clamp in such a manner that the
1st tooth of the toothed drive belt (1) is
aligned with the edge of holder (2).
Tighten clamp.
Tightening torque = 6 Nm (4.3 ft. lbs.).

Adjustment:
Tighten the toothed drive belt lightly
with the eccentric bolt.
Final tightening is performed after
installation of the door.
Adjust door in such a manner that the
baseplate can be run without danger of
knocking.

Caution!
Danger of clamping.

Supply 12 volts current to the door
motor on the 2-pin plug (yellow).
While running the door baseplate the
toothed drive belt must not run on the
sides of the upper and lower rollers.

If necessary, straighten holders of
tensioning rollers (1 and 2) with, for
example, a pliers.

Maladjustment of the tensioning rollers
will lead to premature toothed drive
belt wear.