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 TM 9-4120-430-14
0064 00
5.
Disconnect clamps (18) on-service valves (19) by removing screws (16) and flat washers (17).
6.
Remove screw (20), flat washer (21), and clamp (22) and disconnect and remove the pressure relief valve (23).
7.
Remove screws (24), flat washers (25), and clamps (26) that secure tubing (27) of the high and low pressure
switches to the fan housing (11).
8.
Using a socket head screw key (Item 13, Table 2, WP 0067 00), loosen two setscrews (1) to release shaft extension
(2) from motor shaft.
9.
Debraze refrigerant lines (34 and 35) on the high and low side at the hot gas bypass valve (36). Refer to WP 0046
10. Remove four capscrews (5) and flat washers (6) from locking rib nuts of motor mount (7) that secure the motor
mounting plate (8) to the motor mount.
11. Slide out motor shaft from shaft extension (2) and impeller (4).
12. Lift out motor (3) and mounting plate (8) from unit.
13. Remove condenser fan housing (11) by removing six countersunk screws (9) from the bottom of unit housing and
one countersunk screw (10) on the side of unit housing.
DISASSEMBLY
1.
Using a socket head screw key (Item 13, Table 2, WP 0067 00), loosen two setscrews (31) from impeller (4) to
release impeller (4) from shaft extension (2).
2.
Remove four screws (28) and four flat washers (29) to remove inlet bell (30) from fan housing (11).
3.
Remove impeller (4) from fan housing (11).
4.
Remove four nuts (31), lockwashers (32), and screws (33) that secure the motor (3) to the motor mounting plate (8).
Remove motor from motor mounting plate.
INSPECTION
1.
Inspect inlet bell (30), impeller (4) and fan housing (11) for out-of-round conditions, dents, burrs, and nicks.
2.
Replace defective items.
3.
Check impeller (4) for damaged or bent vanes. Straighten or replace impeller (4).
4.
Inspect exterior case of motor for cracks, dents, oil, evidence of overheating or any other abnormalities. Replace
defective motor.
5.
Turn motor shaft by hand and listen for clicking sounds that indicate bad bearings. Replace if bearings are bad.
6.
If the shaft cannot be rotated, the bearings may have seized. Replace motor.
7.
Test the thrust bearings by attempting to push and pull the motor shaft axially.
8.
If end play is excessive (i.e., can be felt on manual push-pull), the thrust bearings and shims are worn beyond limits
and motor should be replaced.
9.
Use a multimeter or continuity tester to check continuity between leads. See wiring diagram (WP 0038 00).
0064 00-2
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