TM-9-2320-272-24-4

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

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

JUNE 1998

TM-9-2320-272-24-4 - Page 328 of 836

TM 9-2320-272-24-4

5-47. FORWARD CLUTCH MAINTENANCE

THIS TASK COVERS:

a. Removal

d. Assembly

b. Disassembly

e. Installation

c. Cleaning and Inspection

INITIAL SETUP:

APPLICABLE MODELS

All

SPECIAL TOOLS

Spring compressor (Appendix E, Item 95)

Forward clutch clearance gauge (Appendix E,

Item 46)

TOOLS

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

Spring tester (Appendix E, Item 131)

Outside micrometer (Appendix E, Item 80)

Vernier caliper (Appendix E, Item 159)

Depth gauge (Appendix E, Item 81)

Arbor press

MATERIALS/PARTS

Two turbine shaft seal rings (Appendix D,

Item 640)

Turbine shaft seal ring (Appendix D, Item 639)

Piston inner seal ring (Appendix D, Item 515)

Piston outer seal ring (Appendix D, Item 516)

Oil-soluble grease (Appendix C, Item 53)

Lubricating oil (Appendix C, Item 47)

REFERENCES (TM)

TM 9-2320-272-24P

EQUIPMENT CONDITION

Transmission oil pump and front support removed

(para. 5-46).

SPECIAL ENVIRONMENTAL CONDITIONS

Work area clean and free from blowing dirt and

dust.

1.

Lift forward clutch housing (9) and turbine shaft (1) straight out from transmission (5).

NOTE

Perform step 2 for transmissions with three-piece bearing.

2.

Remove bearing race (2), roller bearing (3), and bearing race (4) from turbine shaft (1).

NOTE

Perform step 3 for transmissions with single-piece bearing assembly.

3.

Remove bearing assembly (6) from turbine shaft (1).

1.

Remove seal ring (10) and two seal rings (11) from turbine shaft (1). Discard seal ring (10) and two

seal rings (11).

NOTE

Support Power Takeoff (PTO) drive gear on arbor press for steps 2

through 6.

5-322