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 246 of 991
TM 9-2320-272-24-2
3-335. TRANSMISSION PTO-TO-HYDRAULIC PUMP PROPELLER SHAFT UNIVERSAL
JOINT
MAINTENANCE
THIS TASK COVERS:
a. Disassembly
b. Inspection
INITIAL SETUP:
c. Assembly
APPLICABLE MODELS
M925/A1/A2, M928/A1/A2, M929/A1/A2,
M930/A1/A2, M932/A1/A2, M936/A1/A2
TOOLS
REFERENCES (TM)
TM 9-2320-272-24P
EQUIPMENT CONDITION
General mechanic ’s tool kit (Appendix E, Item 1)
Transmission PTO-to-hydraulic pump propeller
shaft removed (para. 3-334).
MATERIALS/PARTS
Dust cap assembly (M939/A1)
(Appendix D, Item 103)
Dust cap assembly (M939A2) (Appendix D,
Item 104)
Lubricating oil (Appendix C, Item 50)
a. Disassembly
NOTE
This procedure covers maintenance for both universal joints,
1.
Position propeller shaft (1) in soft-jawed vise so end yoke (2) moves freely.
2.
Remove four lockrings (6) from universal joint (5).
NOTE
Do not drop bearing cups. Needle bearings inside are very small
and can easily be lost.
3.
Remove two bearing cups (4) and end yoke (2) from propeller shaft yoke (3).
4.
Remove two bearing cups (7) and universal joint (5) from propeller shaft yoke (3).
5.
Remove grease fitting (8) from universal joint (5).
6.
Remove dust cap (10) and slip yoke (13) from propeller shaft splines (9).
7.
Remove dust cap (10), nylon washer (11), and felt washer (12) from slip yoke (13). Discard felt
washer (12), nylon washer (11), and dust cap (10).
8.
Remove grease fitting (14) from slip yoke (13).
b. Inspection
1.
Inspect bearing cups (4) and (7) for worn or missing needle bearings. Replace needle bearings if
worn or missing.
2.
Apply a few drops of lubricating oil in bearing cups (4) and (7). Using finger, roll needle bearings
around to check for free movement. Replace bearing cup(s) (4) or (7) if needle bearing movement is
rough or uneven.
3.
Inspect end yoke (2), propeller shaft yoke (3), slip yoke (13), and universal joint (5) for scoring,
burrs, cracks, and bends. Replace part(s) if defective.
3-854
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