7.5 Coolers
General
Keep the coolers clean to maintain their efficiency.
Instructions for air-cooled compressors
• Stop the compressor, close the air outlet valve and switch off the voltage.
• Cover all parts under the coolers.
• Remove any dirt from the coolers with a fibre brush. Never use a wire brush or metal objects.
• Next, clean with an air jet in the reverse direction to normal flow. Use low pressure air. If necessary, the
pressure may be increased up to 6 bar(e) (87 psig).
• If it is necessary to wash the coolers with a cleaning agent, consult Atlas Copco.
7.6 Belt tensioning and replacement
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 belt 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.
Instruction book
2920 7104 10 81
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