TM-9-2320-272-24-2

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

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4

JUNE 1998

TM-9-2320-272-24-2 - Page 850 of 991

4-22. ENGINE

TM 9-2320-272-24-2

THIS TASK COVERS:

a. Removal

b. Disassembly

c. Cleaning and Inspection

d. Assembly

e. Installation

INITIAL SETUP:

APPLICABLE MODELS

M939/A1

TOOLS

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

Torque wrench (Appendix E, Item 146)

MATERIALS/PARTS

Three lockwashers (Appendix D, Item 364)

Oil pan gasket (Appendix D, Item 493)

Aerator gasket (Appendix D, Item 177)

Gasket (Appendix D, Item 493)

Suction flange gasket (Appendix D, Item 178)

Sealing compound (Appendix C, Item 62)

REFERENCES (TM)

TM 9-2320-272-24P

LO 9-2320-272-12

EQUIPMENT CONDITION

Front sump tube removed (para. 3-9).

Oil dipstick tube removed (para. 3-3).

Engine oil drained (para. 3-5).

1.

2.

3.

4.

5.

6.

Disconnect oil return hose (6) from aerator (3).

Disconnect oil pickup hose (2) from suction flange (5).

Remove two screws (7), washers (8), clamps (1), oil return hose (6), and pickup hose (2) from oil

pan (4).

Remove six screws (15) and washers (14) from oil pan (4) and flywheel housing (10).

Remove four screws (13) and washers (12) from rear of oil pan (4).

Remove thirty screws (17), washers (16), four screws (19), washers (20), brace (18), oil pan (4), and oil

pan gasket (11) from engine block (21), and front gearcase cover (9). Discard oil pan gasket (11) and

clean gasket remains from mating surfaces of brace (18). oil pan (4), engine block (21), and front

gearcase cover (9).

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