Sample Procedure

Air Compressor

1. Semiannual
B.   USE:
    These task lists are by no means all-inclusive. You should add to them or delete portions or items that do not apply to your operations; however, carefully consider each item as you come to it and then make your decision. You also will need to refer to manufacturer maintenance procedures for complete and specific steps that may apply. (NOTE: follow standard safety procedures at all times.)
1.   Review manufacturer's instructions
2.   Coordinate motor PM on an annual basis. (see procedure "Motors")
3.   Tank should be inspected and tested by qualified inspector.
4.   Secure the electrical service.


1.   Perform normal tour checks and operations.
2.   Change compressor crankcase oil.
3.   Clean air intake filter.
4.   Check air dryer, automatic condensate drains, and air tank for proper operation. Clean condenser coils and cover grills.
5.   Inspect belt alignment and condition. Adjust or replace belts as required.
6.   Check for corrosion and scale on water cooled units.
7.   Clean heat exchange surfaces.
8.   Check accuracy of gauges with calibrated test gauge.
9.   On two stage compressor, check intermediate pressure.
10.   Test relief valves, replace if leaking or the relief range is incorrect. Do not readjust safety relief valves in the field.
11.   Check operation of compressor unloaders, repair or replace if not loading and unloading properly.
12.   Check compressor suction and discharge valves for proper operation. Replace leaking valves.
13.   Check cut in and cut out of compressor pressure controller, readjust if necessary for proper air pressure requirements. Do not exceed ASME maximum tank pressure.
14.   Check to make sure belt guard is installed prior to putting air compressor back in service.
15.   No pressure vessel is to have its hand hole or man hole covers removed unless the vessel is at atmospheric pressure.

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