TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 447 of 1275

TM 9-2350-311 -20-1

(3) DRIVER’S NBC HEATER FAILS TO OPERATE;

PURIFIER AND CANNONEER NO.

2

NBC HEATER

OPERATE PROPERLY

General mechanic’s tool kit (item 64, Appx H)

Multimeter (item 36, Appx H)

TA-1 probe kit (item 43, Appx H)

A

I

1. Disconnect lead 4396 from driver’s NBC

heater.

2. Place red lead of multimeter in lead 4396 and

black lead to ground.

3 Turn MASTER and NBC switches ON and

check for voltage.

4. Turn MASTER-and NBC switches OFF.

, ,

Is voltage present?

I

1

Repair or replace lead 4396 of

ventilated face piece system power

wiring harness (para 8-62).

[

Replace driver’s NBC heater (para 12-3). I

END OF TASK

3-347

INITIAL SETUP

Tools