10.9 Drive belt maintenance
Material Spare parts (if required)
Precondition Cut-off the electrical power supply via the power supply isolating device,
ensure that the device is locked off,
verify the absence of any voltage.
The machine has cooled down.
WARNING
Touching the moving drive belt may result in severe bruising or even loss of limb or extremi‐
ties.
➤ Switch off and lock out the power supply isolating device and verify the absence of volt‐
age.
Fig. 24 Drive belt maintenance
1 Nut
2 Nut
3 Marker pin (shown as: belt tensioning re‐
quired)
4 Screw plug
5 Belt guard
Checking belt tension and adjustment
The tensioning device uses spring force to apply correct tension to the belt.
Adjust the tension when the marker pin reaches the top end of the elongated hole.
The marker pin can be seen through a viewing window from outside. This means that belt tension
can be checked without opening the machine.
1. Loosen the 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. Retighten the locking nut 2 .
Visually check for damages.
1. Loosen the screw plugs 4 and lift the belt guard 5 .
2. Manually turn the pulley so that all of the belt can be inspected for damage.
10 Maintenance
10.9 Drive belt maintenance
901824 12 E
Operating Manual Screw Compressor
ASK
67
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