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 505 of 828

TM 9–2350–311–20–2

9–3

a.

Removal

WARNING

While performing all procedures in this section except for testing, disconnect the battery ground ca-

ble at battery terminal to cut off cab electrical power. Failure to observe this warning could result in

severe burns and electrical shock, resulting in injury or death.

NOTE

This procedure is written for one contact arm assembly, but applies to all five.

1

Remove hex nut (1), lockwasher (2), machine bolt (3), and power cable (4) at bus bar terminal (5). Discard

lockwasher.

NOTE

All harnesses must be tagged or marked to assure correct assembly.

2

Remove five machine screws (6) and five lockwashers (7) securing harness (8) and telephone intercom har-

ness (9). Lift off harnesses. Discard lockwashers.

CAUTION

Use care in removing or installing ring segment. Place ring segment in a safe place to prevent dam-

age to the silver contact surface.

3

Remove ten self-locking screws (10) and ten flat washers (11) to release ring segment (12). Discard self-

locking screws.

10

11

12

5

3

1

2

6

7

4

8

9