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 553 of 828

TM 9–2350–311–20–2

Change 2

12–11

11

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

12

Install flat washers (25), door handle assembly (26), flat washers (25), and nut (24). Install new cotter pin

(23).

NOTE

Perform step 13 for commander’s cupola with hook latch assembly or steps 13.1 through 13.3 for

commander’s cupola with knob latch assembly.

13

Install manual control lever (21), spring (20), straight pin (19), two sleeve spacers (18), and two flat washers

(17). Install two new cotter pins (16).

13.1

See para 14–3 for assembly of knob latch assembly (22.4).

13.2

Install four inserts (22.6) if removed.

13.3

Install adapter plate (22.5), latch assembly (22.4), six new lockwashers (22.3), two cap screws (22.2), and

four cap screws (22.1).

24

25

28

27

23

30

29

26

25

21

19

18

17

20

18

17

16

22.1

22.3

22.2

22.3

22.6

22.5

22.4