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TM 9-2350-287-20-2
18-19. APU HYDRAULIC PRESSURE SWITCH ASSEMBLY REPLACEMENT.
This Task Covers:
a. Removal
b. Installation
Initial Setup:
Tools/Test Equipment:
Equipment Conditions:
• Drain pan (item 14, Appendix I)
• Vehicle parked on level ground (refer to
• General mechanic’s tool kit (Item 24,
TM 9-2350-287-10).
Appendix I)
• MASTER switch set to OFF (refer to
TM 9-2350-287-10).
Materials/Parts:
• APU compartment side door opened (refer to
• Cap and plug set (Item 13, Appendix D)
TM 9-2350-287-10).
• Lockwasher (4) (Item 196, Appendix H)
• Battery ground cables disconnected (para 7-41).
• Left front crew compartment dome light removed
(para 7-30).
Personnel Required: Two
a.
1.
2.
3.
4.
5.
b.
1.
2.
3.
REMOVAL
Disconnect two electrical pressure switch connectors (1) from APU wiring harness 12329640.
CAUTION
To prevent hydraulic contamination system, hydraulic lines and ports must be capped
immediately after disconnection.
Place drain pan under APU pressure hose (6).
Disconnect APU pressure hose (6) from hydraulic pressure switch assembly (4) at connector (5).
While an assistant supports switch assembly (4), remove four screws (3) and lockwashers (2) from switch
assembly (4).
Remove pressure switch assembly (4) from wall of APU compartment.
INSTALLATION
While assistant supports hydraulic pressure switch assembly (4), secure switch assembly (4) to APU
compartment wall with four new Iockwashers (2) and screws (3).
Connect APU pressure hose (6) to pressure switch assembly (4) at connector (5).
Connect two electrical pressure switch assembly connectors (1) to APU wiring harness 12329640.
18-48
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