TM-9-2350-311-20-2
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS
DECEMBER 1993
TM-9-2350-311-20-2 - Page 488 of 828
TM 9–2350–311–20–2
8–64
8–13 POWER RELAY BOX ASSEMBLY — CONTINUED
c.
Assembly
1
Install the following on electromagnetic relay (31): two flat washers (52), semi-conductor (51), one end of
electrical lead (50), two new lockwashers (49), two flat washers (48), and two hex nuts (47).
2
Aline two mounting holes on electromagnetic relay (31) with holes in cab power relay box assembly (2). In-
stall electromagnetic relay (31) on cab power relay box assembly using two new lockwashers (54), other
end of electrical lead (50), and two machine screws (53).
3
Install circuit breaker (36) in cab power relay box assembly (2) using four machine screws (43) and four new
lockwashers (44).
4
Slide one end of power relay shunt (42) onto post (40) on circuit breaker (36). Install hex nut (38) and new
lockwasher (39) on post (40). Slide other end of power relay shunt (42) onto relay load terminal post and
tighten hex nut (41).
38
39
42
43
44
33
34
37
35
36
40
41
54
53
54
49
48
47
53
50
52
51
46
31
2
45
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