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 724 of 799

TM 9-2320-272-24-3

4-212. TRANSMISSION POWER TAKEOFF (PTO) MAINTENANCE

THIS TASK COVERS:

a. Disassembly

b. Cleaning and Inspection

c. Assembly

INITIAL SETUP:

APPLICABLE MODELS

M925, M928, M929, M930, M932, M936

TOOLS

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

Torque wrench (Appendix E, Item 144)

Dial indicator (Appendix E, Item 36)

Arbor press

MATERIAL/PARTS

Two shift cover gaskets (Appendix D, Item 221)

Two bearing cap gaskets

(Appendix D, Item 222)

Two thrust washers (Appendix D, Item 683)

Output shaft oil seal (Appendix D, Item 501)

Snapring (Appendix D, Item 664)

O-ring (Appendix D, Item 459)

Lockwasher (Appendix D, Item 394)

Woodruff key (Appendix D, Item 733)

Oil-soluble grease (Appendix C, Item 53)

Drycleaning solvent (Appendix C, Item 71)

Lubricating oil (Appendix C, Item 48)

REFERENCES (TM)

TM 9-2320-272-24P

EQUIPMENT CONDITION

Transmission PTO removed (para. 4-211).

GENERAL SAFETY INSTRUCTIONS

l

Keep tire extinguisher nearby when using

drycleaning solvent.

l

Drycleaning solvent is flammable and toxic.

Do not use near an open flame.

l

When cleaning with compressed air, wear

eyeshields and ensure source pressure does

not exceed 30 psi (207 kPa).

a. Disassembly

1.

Remove woodruff key (7) from PTO output driveshaft (8). Discard woodruff key (7).

2.

Remove four screws (3), shifter cover (2), gaskets (4) and (6), and spacer (5) from PTO housing (1).

Discard gaskets (4) and (6).

3.

Remove setscrew (11) and pipe plug (13) from PTO mating flange (12).

4.

Using arbor press, press idler pin (10) completely through PTO housing (1).

5.

Remove lube adapter (9) (if present) with idler pin (10).

4-988