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Checking 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
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 below.
4
Refit the bodywork panels.
Model
GA 5
GA 7
GA 11
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
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.
152
New belt
F
N
lbf
18.2
5.1
18.2
5.1
21.2
6.1
The belts must always be replaced as a set, even if only one of the belts is worn. Only use
genuine Atlas Copco belts.
Used belt
Frequency
F
Hz
N
105
12.6
105
12.6
115
14.2
Instruction book
Frequency
lbf
Hz
3.6
86
3.6
86
4.0
94
2920 7090 51
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