Atlas Copco GA 55+ User Manual

- Run the compressor until warm. Stop the compressor after 3 minutes of unloaded operation.
Close the air outlet valve and switch off the voltage. Wait a few minutes and depressurise by
unscrewing oil filler plug (FC) just one turn to permit any pressure in the system to escape.
- Loosen the vent plug of the oil cooler and wait for 5 minutes. See section Introduction for the
position of the vent plug (VP).
- Remove drain plug (DP1) and open drain valve (Dm).
Also drain the oil by removing the drain plug:
• on the check valve (DP2)
• on the gear casing (DP3)
- Collect the oil in a collector and deliver it to the local collection service. Refit and tighten the drain
and vent plugs after draining.
Close the drain valve (Dm).
- Unscrew the bolts of lid (2) and remove it. Take the filter element out of the oil filter housing (OF).
Fit a new oil filter. Oil the new gasket. Install the lid and screw the bolts of lid (2) on the oil filter
housing.
- Remove filler plug (FC).
Fill the air receiver (AR) with oil until the level reaches the filler neck.
Take care that no dirt drops into the system. Refit and tighten filler plug (FC).
- Run the compressor loaded for a few minutes. Stop the compressor and wait a few minutes to
allow the oil to settle.
- Depressurise the system by unscrewing filler plug (FC) just one turn to permit any pressure in the
system to escape. Remove the plug.
Fill the air receiver with oil until the level reaches the filler neck.
Tighten the filler plug.
- Reset the service warning after carrying out all service actions in the relevant Service Plan:
For compressors with Elektronikon® II regulator, see section Service menu.
7.4 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 the side baffle that encloses the fan compartment.
• Remove any dirt from the coolers with a fibre brush. Brush in the direction of the cooling fins.
Also remove any dirt from the fan with a fibre brush.
• 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.
• Remove the cover used during cleaning.
• Mount the side baffle that encloses the fan compartment.
Instruction book
API603130 79

Atlas Copco GA 55+ Specifications

General

Brand	Atlas Copco
Model	GA 55+
Category	Air Compressor
Language	English