Technical data

Ventilator Drive 6–57

6.18 Ventilator Drive

6.18.1 Ventilator drive – Drive-belt check and adjustment

Preconditions

• Engine is stopped and starting disabled.

Special tools

Designation / Use Part No. Qty.

Belt-tension tester

Preparatory steps

1. Remove screws from guard cover.

2. Remove guard cover.

Belt condition check

1. Remove guard cover.

2. Check V-belt for contamination by oil, cracks, wear, chunking and signs of overheating.

3. Replace V-belt:

• If belt is oily;

• If belt shows signs of overheating;

• If belt shows cracks;

• If belt is worn;

• If belt is chunked (→ Page 6 – 60).

Belt-tension check on 12/16V engines:

1. Place belt-

tension tester onto V-belt midway

between the belt pulleys (arrow).

2. Press button uniformly against V -belt surface

until spring disengagement can be heard and felt.

3. Take off belt-tension tester without changing the

position of the i

ndication arm.

4. Read off measured value at the intersection of

indication arm and "KG" scale.

• Specified belt tension for new V-belt: 660 N

• Specified belt tension for used V-belt: 510 N

5. If the measured value d

eviates from the specified

belt tension, readjust belt tension.