Vent plug on water-cooled GA 90 up to GA 250, GA 315 60 Hz and GA 132 VSD up to GA 315 VSD compressors
Procedure
Step Action
1 Run the compressor until warm. Stop the compressor, close the air outlet valve and switch
off the voltage. Wait a few minutes and depressurise by unscrewing plug (8) only one turn
to permit any pressure in the system to escape.
2 Loosen the vent plugs on top of the oil coolers.
3 Drain the oil by removing the drain plugs.
Plugs are fitted on the:
•
Air receiver (6)
•
Oil stop valve (4)
•
Check valve (5)
•
Gearbox (3)
•
Oil coolers (9) of air-cooled compressors
•
Flexible between the oil filter housing and oil coolers of water-cooled compressors
On air-cooled GA 315 50 Hz and air-cooled GA 355 up to GA 500, loosen the clip fixing
the flexible to the frame. Lift the flexible until all the oil is drained.
Tighten the plugs after draining.
4 Remove filler plug (8). Fill the air receiver with oil until the level reaches the filler opening.
Refit and tighten plug (8)
Tighten the vent plug of the oil cooler.
5 Run the compressor loaded for a few minutes to allow the oil cooler by-pass valve to open.
Stop the compressor and wait a few minutes.
6 Depressurise the system by unscrewing plug (8) only 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 opening. Tighten filler plug (8).
Instruction book
2920 1475 06 97
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