CB9A-020 page 11
MAINTENANCE
CRANKCASE LUBRICATION
Non-detergent motor oils are recommended. However, detergent oils can be used providing the gas being
handled does not react with the detergent in the oil. If using a detergent oil, be sure there is not a compatibility
problem. The following gasses are known to react with detergents in oil:
Ammonia Monoethylamine
Monomethylamine Dimethylamine Trimethylamine
The oil used, detergent or non-detergent, should be of high quality such as API grade SF, SG, SH or
similar. API grade SA, SB, SC or similar oils should never be used. Recycled oils should never be
used.
The oil in the crankcase should be changed every 1,000 hours or 180 days, whichever is shorter. Under severe
dusty or sandy operating conditions, the oil should be changed every 500 hours or every 90 days. NOTE: When
equipped with a spin-on oil filter, intervals between oil changes may double (not to exceed 180 days).
OIL CAPACITY
Air Temperature Oil Viscosity Size # Quarts
160A 2
360A 3
Below 0°F (-18°C)
0 to 32°F (-18 to 0°C)
32 to 80°F (0 to 27°C)
80°F (27°C) and above
SAE 5W
SAE 10W
SAE 20W
SAE 30W
600A 6
To change the oil, drain the crankcase then clean the oil pickup screen in a suitable solvent. When reinstalling
the pickup screen, inspect the metal gasket and the O-ring for damage. Replace if necessary. If supplied, the
external oil filter should also be replaced. Refill the crankcase via the dipstick opening.
SETTING THE OIL PRESSURE: The oil
pressure should be about 25 psig.
1. Loosen the locknut.
2. To increase the pressure setting turn the
adjusting screw inward (clockwise).
To decrease the pressure setting turn the
adjusting screw outward (counterclockwise).
3. Retighten the locknut.
ROTATION
The compressor rotation direction is indicated by the upper arrow
(12 o'clock position) located on the face of the oil pump cover.
To reverse the rotation of the compressor, remove the capscrews in
the oil pump cover and rotate the cover 180 degrees. In this
position, the upper arrow on the oil pump cover will indicate rotation
in the opposite direction. NOTE: The oil pump pressure gauge must
also be removed and reinstalled in the upper gauge port.
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