Model New belts Belts in use
F Frequency F Frequency
N lbf Hz N lbf Hz
GA 5 VSD MED 17.9 5.1 105 11.7 3.3 86
GA 7 VSD MED 17.9 5.1 105 11.7 3.3 86
GA 11 VSD MED 20.8 5.9 115 13.9 4.0 94
GA 15 VSD MED 24.6 7.0 125 16.4 4.7 102
Adjusting the belt tension
Step Action
1 Stop the compressor, close the air outlet valve and switch off the voltage.
2 Remove the front panel and the right panel.
3 Loosen bolts (2) by one turn.
4 Adjust the belt tension by turning nuts (1).
5 The tension is correct when the force F needed to create a deflection of 5 mm (0.2 in) corresponds
to the data in the table above.
6 Tighten bolts (2).
7 Refit the bodywork panels.
Replacing the belts
The belts must always be replaced as a set, even if only one of the belts is worn. Only use
genuine Atlas Copco belts.
Step Action
1 Stop the compressor, close the air outlet valve and switch off the voltage.
2 Remove the front panel and the right panel.
3 Loosen bolts (2) by one turn.
4 Release the belt tension by loosening nuts (1).
5 Remove the belts.
6 Install the new belts.
7 Tension the belts as described above.
8 Refit the bodywork panels.
9 Check the belt tension after 50 running hours and adjust if necessary.
Instruction book
82 2920 7104 10
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