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 470 of 828

TM 9–2350–311–20–2

8–46

Change 2

8–10 NBC GROUND LEAD

This task covers:

a.

Removal

b.

Disassembly/Assembly

c.

Testing

d.

Installation

INITIAL SETUP

Applicable Configuration

M109A4/M109A5 howitzers

Test Equipment

Multimeter (item 6, Appx H)

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Materials/Parts

Lockwasher (item 55, Appx G)

Lockwasher (item 77, Appx G)

Equipment Condition

Disconnect batteries (TM 9–2350–311–20–1)

a.

Removal

1

Remove cap screw (1), lockwasher (2), and one end of lead (3) from M27 periscope box (4). Discard lock-

washer.

2

Remove cap screw (5), lockwasher (6), and other end of lead (3) from top of M2A2 air purifier (7). Discard

lockwasher.

b.

Disassembly/Assembly

See repair procedures for terminals (para 8–1).

c.

Testing

Using multimeter, test NBC ground lead for continuity.

d.

Installation

1

Secure lead (3) to M27 periscope box (4) using new lockwasher (2) and cap screw (1).

2

Secure lead (3) to M2A2 air purifier (7) using new lockwasher (6) and cap screw (5).

4

1

2

3

5

6

3

7