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 646 of 828

TM 9–2350–311–20–2

17–8

17–3 M2A2 AIR PURIFIER AND BRACKET

This task covers:

a.

Removal

b.

Disassembly

c.

Cleaning

d.

Inspection

e.

Assembly

f.

Installation

INITIAL SETUP

Applicable Configuration

M109A4/M109A5 howitzers

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Materials/Parts

Cloth (item 10, Appx D)

Lockwasher (item 55, Appx G)

Lockwashers (4) (item 77, Appx G)

Lockwashers (4) (item 79, Appx G)

References

AR 70–38

FM 3–3

FM 3–4

TM 10–277

Equipment Condition

CAB POWER switch to OFF (TM 9–2350–311–10)

Vehicle MASTER switch to OFF (TM 9–2350–311–10)

CAB NBC POWER switch to OFF (TM 9–2350–311–10)

a.

Removal

1

Disconnect four hoses (1) from four air outlets (2).

2

Remove cap screw (3), lockwasher (4), and one end of ground lead (5) from M27 periscope box (6). Discard

lockwasher.

3

Remove machine screw (7) and lockwasher (8) that secure the other end of ground lead (5) from top of

M2A2 air purifier (9). Discard lockwasher.

4

Unplug NBC power lead assembly (10) from side of M2A2 air purifier (9).

5

Release strap (11) and lift out M2A2 air purifier (9).

6

Remove four cap screws (12) and four lockwashers (13) to remove angle bracket (14) from right front cab

wall. Discard lockwashers.