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 549 of 828

TM 9–2350–311–20–2

Change 2

12–7

NOTE

Steps 6 through 10 pertain to cupola covers without outside latch assembly.

6

Remove cotter pin (23), nut (24), flat washers (25), and door handle assembly (26). Discard cotter pin.

7

Remove cupola handle cam (27), key (28), flat washer (29), and spring washer (30). Discard spring washer.

8

Remove two cap screws (31) and locking latch (32).

9

To disassemble locking latch (32), remove two cotter pins (33), two flat washers (34), two sleeve spacers

(35), straight pin (36), helical torsion spring (37), and cupola latch (38) from latch bracket (39). Discard two

cotter pins.

10

Remove two cotter pins (40), two flat washers (41), two springs (42), and two support hooks (43). Discard

two cotter pins.

11

Strip off non-metallic seal (44) and discard.

NOTE

Clean dirt and adhesives from seal seat.

12

Separate cushioning pad (45) from cupola body assembly (46). Discard cushioning pad.

24

34

33

36

44

39

37

38

25

28

27

23

30

29

26

25

35

42

40

43

46

31

32

45

41