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 575 of 1275

TM9-2350-311-20-1

6-8 ENGINE-DRIVEN FUEL PUMP

This task covers:

a. Shaft Check

b. Removal

c. Installation

Tools

,.

Equipment Condition

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

Air intake grille opened and secured (para 11 -8)

Exhaust crossover tube removed (para 6-15)

Materialsls/Parts

Exhaust grille removed (para 4-5)

Gasket (item 182, Appx G)

Radiator fan access door removed (para 4-5)

Front slope plate removed (para 4-5)

a. Shaft Check

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

occur, causing severe injury or death.

Check for broken shaft by removing top pump body drain plug (1). Insert small wire (approximate length and size of a

straightened paper clip) in pump body hole (2). Rotate shaft by cranking engine momentarily. If vibration is felt, shaft is

good. if no vibration is felt, replace pump.

6-20

WARNING