Technical data

6–58 Ventilator Drive

Belt-tension check on 18V 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 indication arm.

4. Read off measured value at the intersection of

indication arm and "KG" scale.

• Specified belt tension for new drive belt:

670 N –-50 N

• Specified belt tension for used drive belt:

570 N –-50 N

5. If the measured value deviates from the specified

belt tension, readjust belt tension.

Belt-tension adjustment on 12/16V engines:

1. Loosen securing screws (3).

2. Release locknut (2).

3. Screw in tensioning screw (1) to set specified

belt tension.

4. Tighten locknut.

5. Check V-belt tension.

6. Tighten securing screws with torque wrench.

• Tightening torque: 100 Nm

Belt-tension adjustment on 18V engines:

1. Loosen securing screws (1 and 4).

Note: On engines for 50 Hz generators, bolt

(3) must be in position (A). On all other

engines, it must be in position (B).

2. Screw in tensioning screw (2) to tension V-belt.

3. Check V-belt tension.

4. Tighten securing screws (1 and 4) with torque

wrench.

• Tightening torque: 69 Nm

5. Check V-belt tension.