TM 9-4120-411-14
5.6.A REFILLING COMPRESSOR LUBRICATING OIL.
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
Tools
Materials/Parts
Refrigeration Unit Service Tool Kit
Refrigerant Oil, R-134a
Item 2, Section III, Appendix B
Item 21, Section II, Appendix E
WARNING
The synthetic refrigerant oil used in the compressor is mildly caustic. Protect any
exposed skin from possible contact with refrigerant oil. If refrigerant oil contacts
skin, itching or rash-like irritation can result.
CAUTION
New compressors are not supplied with lubricant. Compressor must be filled with
proper amount of refrigerant oil. Operation without lubricant will destroy the
compressor.
a. Draining.
NOTE
It is important to take careful measurements of the amount of refrigerant oil
contained in the old compressor in order to refill the new compressor with the
proper amount.
(1) When compressor has been removed from unit.
(a) Carefully tip the compressor and drain refrigerant oil from it into a container suitable to hold up to 7 pints
of fluid.
(b) Measure and note the amount of refrigerant oil that was removed.
(c) Discard used refrigerant oil in accordance with established guidelines.
(2) When there has been excessive oil loss from the unit due to a line rupt ure or component failure and the
compressor will not be replaced.
(a) Drain refrigerant oil per either of the following procedures as applicable.
(b) Do not measure amount of oil removed, since oil loss cannot be accurately measured, and proceed
directly to filling.
(c) Discard used refrigerant oil in accordance with established guidelines.
NOTE
The FDECU can be supplied with one of two different compressor casing styles.
Since the compressors are interchangeable, either compressor type can be found
on any given model FDECU. Generally, the FDECU-2 and FDECU-3 use a
compressor that has an oil level indicator and angle drain valve located on the
lower portion of the compressor case and FDECU-4 and thereafter use a
compressor that has no oil level indicator or angle drain valve on the case.
(3) When compressor is installed in unit and has an oil level indicator and angle drain valve.
5-12 Change 1
