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 536 of 1275

TM 9-2350-311-20-1

5-8 AIR BOX HEATER (ENGINE MODEL 7083-7396)

This task covers:

a. Removal/Disassembly

b. Assembly/lnstallation

Tools

.

Materials/Parts

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

Gasket (item 181, Appx G)

Lockwashers (2) (item 88, Appx G)

a Remova/Disassembly

Do not smoke or use open flame when working on fuel systems. An explosion may

occur, causing severe injury or death.

NOTE

For ease of removal of air box heater, engine fuel pump maybe removed first (para 6-8).

1 Disconnect air box heater-to-solenoid tube assembly(1) at air box heater (2).

2 Disconnect coil assembly-to-air box heater lead assembly (3) at heater (2).

3 Disconnect pump and motor-to-air box heater hose assembly (4) at heater (2).

4 Remove two bolts (5) and two Iockwashers (6). Discard Iockwashers.

5 Remove heater (2) and gasket (7). Discard gasket.

6 Remove fuel igniter (8) and fuel injection nozzle (9).

5-15

WARNING