TM 10-8145-222-23
0016
SERVICE CONTINUED
Check Compressor Oil Level
Check compressor oil level as follows:
1. Start refrigeration unit and operate in high speed cooling for 20 minutes (TM 10-8145-222-10, Operating
Procedures).
WARNING
The diesel engine exhaust system will become extremely hot after a short period of
operating time. Use extreme care when working around a hot engine. Serious burns
can result. Allow engine to cool for 30-minutes before performing maintenance.
The MTRCS contains high voltage sources and exposed rotating parts. Make sure to
use extreme care when working on the MTRCS while the engine is operating.
Beware of V-belts and engine driven components. Failure to comply with this warning
can result in serious injury or death to personnel.
Approved hearing protection must be worn when operating the MTRCS diesel
engine. Failure to observe this precaution may result in severe and permanent
hearing loss.
2. Open front panel assembly access cover (WP 0013, Remove).
NOTE
The compressor has two oil sight glass indicators, one on each side. When the
compressor is installed in the system, the easiest one to check is on the side nearest
the front panel assembly access cover.
3. Check oil level sight glass (Figure 1, Item 1) to make sure no oil foaming is present using a mirror.
CAUTION
Excessive engine oil foaming after 20 minutes of operation indicates probable liquid
refrigerant flood-back. Check refrigerant system for flood-back and if present, perform
an inspection of the two thermostatic expansion valves contained within the two
evaporators (WP 0062, Inspect).
NOTE
Certain versions of the compressor installed on the MTRCS refrigeration unit contain
minimum and maximum indicator lines by the compressor sight glass. Other versions
of the compressor do not.
4. With compressor operating, check oil level in oil level sight glass (Figure 1, Item 1).
Oil level in sight glass should indicate oil level is halfway between minimum and maximum.
0016-2
