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 1072 of 1275

TM 9-2350-311-20-1

b. Installation

1

2

3

4

5

NOTE

The following procedure applies to heaters at both driver’s and cannoneer no. 2’s

stations.

Some new heaters may require installation of a mounting plate kit to allow control

knob to be seen. Instructions to install kit are included with heater.

External-tooth Iockwashers are to be installed between mounting blocks or bracket

and heaters.

Step 1 applies to heater (4) at cannoneer no. 2’s station.

Install bracket (15), two new Iockwashers (14), and two screws (13).

Install four new external-tooth Iockwashers (12), four new Iockwashers (11 ), four screws (10), and heater (2 or

4).

NOTE

Heater (2) at driver’s station has two adapters. Heater (4) at cannoneer no. 2’s station

has one elbow and one adapter.

Install two adapters (7) or adapter (8) and elbow (9) as required.

Install two hoses (6) and two clamps (5) over two adapters (7) or adapter (8) and elbow (9) as required.

Tighten clamps.

. .

. ,

.

Connect electrical connector wire 439B (1 ) to heater (2) at driver's station or wire 439C (3) to heater

cannoneer no. 2’s station.

(4) at

12-11