Atlas Copco GX 11, Instruction Book, Page: 61 / 76

6.5 Belt set exchange and tensioning
GX 7 and GX 11
Read the warning in the Preventive maintenance schedule section.
Checking the belt tension on GX 7 and GX 11
Step Action
1 Stop the compressor, close the air outlet valve and switch off the voltage
2 Remove the front door and the internal panel.
3 The tension is correct when a force of between 20 N (4.5 Ibf) and 25 N (5.63 Ibf) applied
at the midpoint of the belts causes a deflection of 5 mm (0.2 in).
4 Refit the bodywork panels.
Adjusting the tension of the drive belts for GX 7 and GX 11
Step Action
1 Stop the compressor, close the air outlet valve and switch off the voltage.
2 Remove the front door, the internal panel, the top cover and the pulley protection.
3 Loosen the 4 bolts (2) by one turn.
4 Adjust the belt tension by turning tensioning nut (1).
5 The tension is correct when a force of between 20 N (4.5 lbf) and 25 N (5.63 lbf) applied
at the midpoint of the belts causes a deflection of 5 mm (0.2 in).
6 Retighten bolts (2).
7 Refit the bodywork panels.
Instruction book
2920 7054 00 59