TM-9-2350-358-BD

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6

TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE

MARCH 1994

TM-9-2350-358-BD - Page 121 of 343

TM 9-2350-358-BD

5-5.

FUEL PUMP(S) (IN-TANK), INOPERATIVE - CONTINUED

4.

Disconnect electrical and fuel hose connections to fuel pump.

5.

Remove fuel pump and hanger assembly from fuel tank.

6.

Remove defective fuel pump from hanger assembly.

7.

Wrap rubber hose or strips around replacement fuel pump body, if required, so that it will be tightly secured when

installed in hanger assembly.

8.

Install replacement fuel pump in hanger assembly

9.

Splice electrical connections, if required, using procedures in Chapter 3.

10.

Install replacement pump and hanger assembly in fuel tank.

11.

Connect electrical and fuel hose connections to fuel pump.

12.

Install engine compartment access cover (left in-tank pump) or powerpack (right in-tank pump).

13.

Record the BOAR action taken.

When the mission is complete, as soon as practical, repair the equipment/system

using standard maintenance procedures.

5-6.

FUEL PUMP (MECHANICAL), INOPERATIVE

General Information:

The mechanical (engine driven) fuel pump is critical to the operation of the howitzer.

The electrical (in-tank) fuel pumps

will not provide the volume and pressure of fuel required by the injector system if the mechanical fuel pump is inoperative.

The following repairs will restore the engine to an operating condition.

Limitations:

None

Personnel/Time Required:

•

1 soldier

•

1.0 hour

Materials/Tools:

Fuel pump (scavenge from available source)

References:

•

TM 9-2350-314-10

•

TM 9-2350-314-20-1-1

Procedural Steps:

1.

Gain access to engine compartment by opening engine air intake grille.

5-4