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TM 9-2350-287-20-2
18-20. APU DIODE REPLACEMENT.
This Task Covers:
a. Removal
b. Installation
Initial Setup:
Tools/Test Equipment:
• General mechanic’s tool kit (Item 24,
Appendix I)
Materials/Parts:
• Silicon sealant adhesive (Item 6, Appendix D)
• Lockwasher (Item 121, Appendix H)
• Lockwasher (Item 124, Appendix H)
• Lockwasher (Item 125, Appendix H)
Equipment Conditions:
• Vehicle parked on level ground (refer to
TM 9-2350 -287-10).
• MASTER switch set to OFF (refer to
TM 9-2350-287-10).
• Battery ground cables disconnected
(para 7-41).
• Left projectile rack assembly moved to
rear of vehicle (refer to TM 9-2350-287-10).
• APU access plate removed (para 15-39).
a.
REMOVAL
1.
Loosen screw (2) and remove access panel (1) from APU.
2.
Remove nut (10), Iockwasher (11), and support (12) from APU preheat solenoid (13). Discard Iockwasher.
3.
Remove screw (5), Iockwasher (8), nut (9), and wire (6) from APU diode (7). Discard Iockwasher.
4.
Remove nut (3), Iockwasher (4), and diode (7) from support (12). Discard Iockwasher.
b.
INSTALLATION
WARNING
Adhesives can burn easily, can give off harmful vapors, and are harmful to skin and
clothing. To avoid injury or death, keep away from open fire and use In a well-
ventilated area. If adhesive gets on skin or clothing, wash Immediately with soap and
water.
1.
Seal all exposed terminals with silicon sealant adhesive.
2.
Install diode (7) on support (12) with new Iockwasher (4) and nut (3).
3.
Install wire (6) on diode (7) with nut (9), new Iockwasher (8), and screw (5).
4.
Install support (12), new Iockwasher (11), and nut (10) on APU preheat solenoid (13).
5.
Install access panel (1) on APU and tighten screw (2).
18-50
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