TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 474 of 1015

TM 9-2320-272-24-1

3-32. FUEL PUMP WITH VS GOVERNOR FILTER REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

REFERENCES (TM)

M936/A1/A2

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

General mechanic’s tool kit (Appendix E, Item 1)

EQUIPMENT CONDITION

MATERIALS/PARTS

l

Parking brake set (TM 9-2320-272-10).

l

Left splash shield removed (TM 9-2320-272-10).

O-ring (Appendix D, Item 424)

Filter (Appendix D, Item 121)

GENERAL SAFETY INSTRUCTIONS

Cleaning cloth (Appendix C, Item 21)

Diesel fuel is flammable. Do not perform this

procedure near flames.

WARNING

Diesel fuel is highly flammable. Do not perform fuel system

procedures near open flame. Injury to personnel may result.

CAUTION

Fuel pump exterior must be cleaned before filter cap is removed to

prevent foreign particles from entering fuel pump.

1.

Using a clean, dry cloth, clean fuel pump (7) located on left side of engine (6).

NOTE

Place hand under fuel filter to catch assembly when snapring is

removed.

2.

Remove snapring (5), retainer (3), filter spring (2), and filter (1) from fuel pump (7).

3.

Remove O-ring (4) from retainer (3). Discard O-ring (4).

4.

Inspect filter (1) for holes or embedded metal particles. If holes or metal particles are found, discard

filter (1).

b. Installation

1.

Install new O-ring (4) on retainer (3).

CAUTION

Small end of filter spring and hole in filter screen must be facing

up toward pump to allow fuel flow. Failure to do this will result in

fuel pump damage.

2.

Install filter (1), filter spring (2), and retainer (3) in fuel pump (7) with snapring (5).

3-110