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 641 of 828

TM 9–2350–311–20–2

17–3

17–2 M3 ELECTRICAL AIR HEATER

This task covers:

a.

Removal

b.

Disassembly

c.

Assembly

d.

Installation

INITIAL SETUP

Applicable Configuration

M109A4/M109A5 howitzers

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Materials/Parts

Lockwashers (4) (item 79, Appx G)

Lockwashers (4) (item 64, Appx G)

Equipment Condition

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

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

a.

Removal

NOTE

•

This procedure is written for one M3 electrical air heater, but applies to all four.

•

There are two types of M3 electrical air heaters with different outlet port configurations. Note the

outlet port position when replacing M3 electrical air heater.

1

Disconnect NBC power lead assembly (1) from M3 electrical air heater (2).

1

2