10.9 Maintaining the Drive Belts
Material Spare parts (if required)
Precondition The power supply disconnecting (isolating) device is switched off,
the disconnect device is locked in the off position,
a check has been made that no voltage is present.
The machine has cooled down.
WARNING
Touching rotating drive belts may result in severe bruising or even loss of limb or extremi‐
ties.
➤ Switch off and lock out the power supply disconnecting (isolating) device and check that
no voltage is present.
Fig. 23 Drive Belt Maintenance
1
Adjusting nut
2
Locking nut
3
Marker pin (the illustration shows that belt tensioning is required)
Checking the belt tension and adjustment
The tensioning device uses spring force to apply correct tension to the belts.
Adjust the tension when the marker pin reaches the top of the elongated hole.
1. Loosen the locking nut
2
.
2. Use the adjusting nut
1
to adjust spring tension until the marker pin reaches the lower end of
the elongated hole.
3. Tighten the locking nut
2
.
Visual damage check
1. Turn the pulley by hand so that all of the belt can be inspected for damage.
2. Change any damaged belts immediately.
Changing the belts
1. Loosen the locking nut
2
.
10 Maintenance
10.9 Maintaining the Drive Belts
9_5717 20 E
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC
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