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 TM 55-1905-220-14-1
Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - continued
Location
Item
Item To Check/
Not Mission
No
Interval
Service
Procedure
Capable If :
19
BEFORE
Air Conditioning
COMPRESSOR UNIT ASSEMBLY
Low oil level.
CHECK OIL LEVEL. While system
is in operation, check oil level in
crankcase by checking sight glass
(1). Add oil (VV-L-825), whenever
the oil level drops below normal,
(half-way up on sight glass), by
removing pipe plug (2). Replace the
pipe plug. Allow sufficient time for the
system to balance after adding oil.
Check oil level again. If the oil level
in the crankcase still falls below
normal, refer to maintenance.
NOTE
After the compressor has
Low oil level.
been stopped for several
minutes, the oil level in the
compressor crankcase
should be about half-way
up on the sight glass.
During operation, the oil
level will be slightly lower
but will appear higher when
oil is foaming.
NOTE
The compressor holds 5
1/2 pts. of oil.
Change 5
2-104
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