TM 9-2330-275-14&P
4-20. REAR DISTRIBUTION BOX MAINTENANCE (M689 AND M840).
This Task Covers:
a. Removal
d. Assembly
e. Installation
c. Cleaning and Inspection
Initial Setup:
Equipment Conditions:
Materials/Parts:
l Intervehicular cable disconnected from towing
l Solder (Item 13, Appendix E)
vehicle and distribution box (para 2-11).
l Dry cleaning advent (Item 14, Appendix E)
Marker tags (Item 16, Appendix E)
Tools/Test Equipment
One bushing
Two gaskets
l General mechanic’s tool kit
Twenty-two lockwashers
l Common no. 1 shop set
1.
Remove tan screws (8), Iockwashers (9), and cover (7) from rear distribution box (12). Discard Iockwashers.
2.
Remove four screws (15), Iockwashers (13), washers (14), and rear distribution box (12) from rear doily.
b.
DISASSEMBLY
1.
Remove retaining nut (11) from rear of connector (4).
2.
Tag and disconnect wires of branched wiring harness (18) from connectors (4 and 23).
3.
Remove branched wiring harness (18) and grommet (17) from cover (7).
4.
Remove four nuts (10), screws (1), lockwashers (2), cover (3), connector (4), bushing (5), and gasket (6) from
cover (7). Discard Iockwashers, bushing, and gasket.
5.
Remove four nuts(16), screws (21), lockwashers (20), connector (23), cover(22), and gasket (19)from cover(7).
Discard Iockwashers and gasket.
WARNING
Dry cleaning solvent P-D-680, is toxic and flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors DO NOT use near open flame or excessive heat.
The solvent’s flash point is 100°F-138°F (38°C-59°C). If you become dizzy while
using cleaning solvent immediately get fresh air and medical help. If solvent contacts
eyes, immediately wash your eyes and get medical aid.
1 .
Clean metal parts with dry cleaning solvent.
4-42
