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 487 of 828
TM 9–2350–311–20–2
8–63
8
Remove hex nut (33) and lockwasher (34) from post (35) on circuit breaker (36). This will release terminal
connecting link (37). Discard lockwasher.
9
Remove hex nut (38) and lockwasher (39) from post (40) on circuit breaker (36). Loosen hex nut (41) on
electromagnetic relay (31). Slide power relay shunt (42) off electromagnetic relay (31) to remove.
10
Remove four machine screws (43) and four lockwashers (44) to remove circuit breaker (36) from cab power
relay box assembly (2). Discard lockwashers.
11
Loosen hex nut (45) on electromagnetic relay (31). Slide conductor bus (46) off electromagnetic relay (31) to
remove.
12
Remove two hex nuts (47), two flat washers (48), two lockwashers (49), one end of electrical lead (50),
semi-conductor (51), and two flat washers (52) from electromagnetic relay (31). Discard lockwashers.
13
Remove two machine screws (53), other end of electrical lead (50), and two lockwashers (54) to release
electromagnetic relay (31) from cab power relay box assembly (2). Discard lockwashers.
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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