Page 142 - Reciprocating Compressors Operation Maintenance

I 28 Reciprocating Compressors: Operation and Maintenance

• The lubrication system:
!. Clean filter and fill sump to proper level.
2, Build up pressure. Units not equipped with a motor driven oil
pump usually have a hand priming pump.
3. Check for leaks, proper pressure, and operation of alarm and shut-
down devices.
«Compressor cylinders:
1. Disconnect each force-feed lubricator line at the compressor cylinder.
2. Fill lubricator sump with proper grade oil.
3. Operate lubricator and check flow of oil. Units not equipped with
motor driven lubricator can be operated by hand cranking or hand
pumping each pump feed.

Caution: Failing to prime and purge each line before starting the com-
pressor can cause serious damage due to inadequate lubrication. Running
a motor-driven lubricator too long (with oil lines connected) before start-
ing must be avoided.

Deposit Removal

Excessive deposits on valves and in discharge areas indicate dirty or
chemically contaminated suction air, excessive oil feeds, or the use of an
unsuitable oil. Deposits should be controlled by regular removal and by
correcting conditions responsible for deposit accumulation.

Changing Crankcase Oil

The frequency of changing crankcase oils depends largely on the
cleanliness of the atmosphere surrounding the compressor. The used oil
should be drained while still warm, and the crankcase should be wiped
clean with lint-free rags before introducing new oil. Lint-producing rags
should not be used for wiping. Solvent cleaners are not usually required
and in no case should a flammable solvent be used.

Force-Feed Lubricators

Maintenance of force-feed lubricators ordinarily involves cleaning the
sight-feed glasses, pumps, and reservoirs. Where liquid filled sight-feed
glasses are used, the liquid may become cloudy or may gradually be dis-