TM-9-2320-272-24-3

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

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 3 OF 4

JUNE 1998

TM-9-2320-272-24-3 - Page 212 of 799

TM 9-2320-272-24-3

4-72. TRANSMISSION REPLACEMENT (OUT-OF-VEHICLE)

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

PERSONNEL REQUIRED

Al1

TWO

SPECIAL TOOLS

Engine barring tool (Appendix E, Item 8)

TOOLS

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

Torque wrench (Appendix E, Item 144)

Transmission jack (Appendix E, Item 147)

MATERIALS/PARTS

Gasket (Appendix D, Item 202)

Gasket (Appendix D, Item 203)

Twelve lockwashers (Appendix D, Item 354)

REFERENCES (TM)

TM 9-2320-272-24P

transmission.

l

Keep transmission tilted slightly downward.

EQUIPMENT CONDITION

Power plant removed (para. 4-4 or 4-5).

GENERAL SAFETY INSTRUCTIONS

l

Torque converter must be removed with

a. Removal

NOTE

l

The use of shim stock tube in torque converter access hole

prevents converter screw from falling down behind flywheel. A

loose screw may cause a lockup condition, preventing

crankshaft rotation required to remove remaining screws.

l

Engine crankshaft may be turned using barring tool.

1.

Remove two screws (4), access cover (3), and gasket (2) from flywheel housing (1). Discard gasket (2).

2.

Using engine barring tool, rotate crankshaft until screw (5) is visible in access hole (7).

3.

Roll shim stock (6) into tube form and size to fit diameter of access hole (7). Insert shim stock (6) in

access hole (7) and position over screw (5) against flywheel (9).

4.

Remove remaining twelve screws (5) from flywheel (9) and converter (8) in the same manner,

5.

Remove four screws (13), lockwashers (12), and clamp (11) from 9, 11, 1, and 3 o’clock positions on

flywheel housing (1) and transmission (10). Discard lockwashers (12).

4-476