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 698 of 828

TM 9–2350–311–20–2

18–30

Change 2

18–5 M117/M117A2 PANORAMIC TELESCOPE

This task covers:

a.

Inspection

b.

Disassembly

c.

Assembly

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Materials/Parts

Lockwasher (item 69, Appx G)

Lockwashers (2) (item 58, Appx G)

Sealing compound (item 28, Appx D)

References

TM 9–2350–311–10

TM 750–116

a.

Inspection

For inspection refer to TM 9–2350–311–10.

b.

Disassembly

NOTE

For removal and installation instructions, refer to TM 9–2350–311–10. For purging and charging

instructions, refer to TM 750–116.

1

Remove two air valve caps (1), two valve cores (2), two purging valve stems (3) and two straps (4).

2

Remove optical eyeshield (5).

3

Remove two machine screws (6), two lockwashers (7), two electrical covers (8) and two LEDs (9). Discard

lockwashers.

4

Remove machine screw (10).

5

Remove machine screw (11), lockwasher (12), and cap assembly (13). Discard lockwasher.

c.

Assembly

1

Install chain of cap assembly (13) under machine screw (11) and new lockwasher (12). Install cap assembly.

2

Install machine screw (10).

3

Install two LEDs (9), two electrical covers (8), two new lockwashers (7), and two machine screws (6).

4

Install optical eyeshield (5).

5

Apply sealing compound to two purging valve stems (3).

6

Install two straps (4), two purging valve stems (3), two valve cores (2), and two air valve caps (1).