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 420 of 1015

TM 9-2320-272-24-1

3-17. FUEL DRAIN AND BYPASS TUBING (M939/A1) REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

M939/A1

TOOLS

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

Torque wrench (Appendix E, Item 144)

MATERIALS/PARTS

Five lockwashers (Appendix D, Item 348)

Lockwasher (Appendix D, Item 349)

Antiseize tape (Appendix C, Item 72)

REFERENCES (TM)

TM 9-2320-272-10

TM 9-2320-272-24P

EQUIPMENT CONDITION

l

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

l

Hood raised and secured (TM 9-2320-272-10).

l

Water pump removed (para. 3-68).

l

Air compressor-to-engine coolant return tube

removed (para. 3-55).

1.

2.

3.

4.

5.

6.

7.

8.

NOTE

Have drainage container ready to catch fuel.

Disconnect fuel supply tube (7) from fuel pump shutoff valve (8).

Disconnect fuel return tube (10) from fuel pump elbow (23).

Remove screw (16), lockwasher (15), washer (14), clamp (13), and spacer (12) from left side of engine

block (1) and bracket (11). Discard lockwasher (15).

Remove screw (17), lockwasher (18), and bracket (11) from left side of engine block (1). Discard

lockwasher (18).

NOTE

Step 5 may not be required for all vehicles.

Remove screw (28), lockwasher (27), washer (26), two clamps (25), fuel supply tube (7), and fuel return

tube (6) from intake manifold (24). Discard lockwasher (27).

Remove nut (2), lockwasher (3), screw (5), and clamp (4) from left side of engine block (1). Discard

lockwasher (3).

Remove nut (21), lockwasher (22), screw (19), and clamp (20) from tubes (6) and (7) left side of

engine block (1). Discard lockwasher (22).

Disconnect fuel return tubes (6) and (10) from tee (9).

3-56