Fig. 41 Manually checking the belt tension
A
Permissible deflection of the belt
*
Compressive load approximately: 10 kg
permissible intrusion depth: 10 – 15 mm
1
Engine block mounting
2
Direction of arrow
3
Engine alternator screw
4
Engine alternator
Checking and resetting belt tension with tension
measuring device:
Manually check and retension the belt:
1. Remove the belt guard.
2. Check belt tension with the tension measur‐
ing device.
3. Tensioning a loose belt:
■ Loosen both securing screws
3
on the
engine alternator
4
.
■ Using a suitable lever, pull the engine
alternator in the direction of the arrow
2
until the correct belt tension is achieved.
■ Re-tighten both securing screws
3
.
4. Replace the belt guard.
5. Reconnect the negative battery terminal.
1. Remove the belt guard.
2. Using your thumbs, push the belt between
the belt pulleys (see illustration 41).
3. Tensioning a loose belt:
■ Loosen both securing screws
3
on the
engine alternator
4
.
■ Using a suitable lever, pull the engine
alternator in the direction of the arrow
2
until the correct belt tension is achieved.
■ Re-tighten both securing screws
3
.
4. Replace the belt guard.
5. Reconnect the negative battery terminal.
Replace the drive belt.
1. Loosen both screws
3
at the engine alternator
4
.
2. Press the engine alternator in opposite direction of the arrow.
The drive belt is free of tension.
3. Pull the drive belt.
4. Check the pulleys for dirt and wear.
■ Dirty pulley: Clean pulley.
■ Worn pulley: Change the pulley.
5. Manually route the new drive belt over the pulleys without using force.
6. Using a suitable lever, pull the engine alternator in the direction of the arrow
2
until the correct
belt tension is achieved.
7. Re-tighten both securing screws
3
.
10 Maintenance
10.3 Drive engine maintenance
118
Operating Manual Portable Rotary Screw Compressor
MOBILAIR M27 PE
No.: 9_9548 22 HCE
