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TM 9-2350-287-20-2
18-2. APU REPLACEMENT.
This Task Covers:
a. Removal
b. Installation
Initial Setup:
Tools/Test Equipment:
Equipment Conditions:
Automotive adjustable wrench, 8" (Item 4,
Vehicle parked on level ground (refer to
Appendix I)
TM 9-2350-287-10).
Five-ton hoist (Item 23, Appendix I)
Master switch set to OFF (refer to
General mechanic's tool kit (Item 24,
TM 9-2350-287-10).
(Appendix I)
Battery ground cables disconnected (para 7-41).
APU compartment side door opened
Materials/Parts:
(refer to TM 9-2350-287-10).
Lockwasher (2) (Item 126, Appendix H)
APU plenum removed (para 18-17).
Lockwasher (6) (Item 164, Appendix H)
APU panels removed (para 18-14).
Shim (Item 336, Appendix H)
APU compartment access plate removed (para 15-
39)
Hydraulic reservoir ball valve closed
Personnel Required: Two
(refer to TM 9-2350-287-10).
a.
REMOVAL
NOTE
Cables, lines, tubes, and harnesses that are disconnected in order to remove the
auxiliary power unit (APU) must be taped to the sides of the APU so they do not
get damaged.
1.
Disconnect two electrical wiring harness connectors (7 and 8) from APU compartment-wall connections.
2.
Disconnect two hydraulic pressure switch electrical connectors No. 61 (10) from the APU.
3.
Disconnect hydraulic pump outlet hose coupling (2) from elbow (3). Allow hose to drain into suitable container.
4.
Disconnect hydraulic pressure hose (1) from hydraulic T-connection (4). Allow hose to drain into suitable
container.
5.
Disconnect hydraulic pump inlet hose coupling (6) from elbow (5). Allow hose to drain into suitable container.
6.
Place hose through APU support stand (9), and allow hose to lie straight against forward APU compartment
bulkhead.
18-2
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