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 TM 9-4120-425-14&P
COMPRESSOR DIRECT SUPPORT MAINTENANCE REPLACEMENT - Continued
0076-00
TEST
1.
Remove cover from compressor (8) terminal box (1).
2.
Tag and disconnect terminal lugs. See schematic diagram, WP 0122-00.
3.
Using a multimeter, test for continuity between pins T1 and T2, T2 and T3, and T3 and T1 of the compressor
electrical receptacle. Continuity should exist. If not, replace compressor.
4.
Check for continuity between pins T1, T2 and T3 and the compressor housing. No continuity should exist. If
continuity exists, replace compressor.
REMOVAL
1.
With dry nitrogen flowing through refrigerant system, debraze tubing attached to compressor (See WP 0051-00).
NOTE
The compressor is mounted on the compressor mounting plate (11) by bolts that are
welded to the plate. It is not necessary to remove the plate (10) and its attaching parts
(9) and (10) unless it is damaged.
2.
Remove four nuts (2), four flat washers (3) and four grommets (4) securing compressor (8) to plate (11).
WARNING
Compressor weighs as much as 92 lbs. (41.72 kg) and could cause injury to
personnel and damage to equipment if not handled properly while removing from
unit. Two personnel are required to lift the compressor.
3.
Carefully lift up compressor from unit.
4.
Remove four resilient mounts (5) from compressor. Inspect for wear or damage. Replace as necessary.
5.
Remove four spacers (6) and (7). Inspect for damage. Replace as necessary.
0076-00-3
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