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 321 of 828

TM 9–2350–311–20–2

6–5

b.

Disassembly

1

Remove four tapping screws (13) and mounting bracket (14) from instruction plate (15).

2

Remove four tapping screws (16) and sight gage bracket (17) from instruction plate (15).

3

Remove screw (18) and pointer handle (3).

4

Remove elbow (19) and adapters (20 and 21) from valve assembly (22).

5

Remove two hex nuts (23), two lockwashers (24), and two machine screws (25). Remove valve assembly

(22) and flat washer(s) (26) from sight gage bracket (17). Discard lockwashers.

6

Remove flat washer (27), clinch sleeve (28), and nonmetallic tubing (29) from adapter (21).

c.

Assembly

1

Install clinch sleeve (28), flat washer (27), and nonmetallic tubing (29) on adapter (21).

2

Install adapters (20 and 21) and elbow (19) on valve assembly (22).

3

Install flat washer(s) (26) on valve assembly (22). Add or subtract flat washer(s), as required, to aline non-

metallic tubing (29) on sight gage (1). Using two machine screws (25), two new lockwashers (24), and two

hex nuts (23), attach valve assembly (22) to sight gage bracket (17).

4

Install pointer handle (3) and screw (18).

5

Install sight gage bracket (17) and four tapping screws (16) on instruction plate (15).

6

Install mounting bracket (14) and four tapping screws (13) on instruction plate (15).

16

17

13

14

15

29

27

28

21

24

23

25

18

3

26

19

20

22