TM 9-2320-272-24-4
5-29. CRANKSHAFT AND GEAR MAINTENANCE
THIS TASK COVERS:
a. Check End Play
d. Cleaning and Inspection
e. Assembly
b . Removal
f . Installation
c . Disassembly
INITIAL SETUP:
REFERENCES (TM)
APPLICABLE MODELS
TM 9-2320-272-24P
M939A2
EQUIPMENT CONDITION
SPECIAL TOOLS
Torque angle gauge (Appendix E, Item 141)
Fuel injectors removed (para. 4-55).
Oil pan and suction tube removed (para. 4-47).
TOOLS
Front gearcase housing removed (para. 4-46).
Flexplate and flywheel housing removed
General mechanic's tool kit (Appendix E, Item 1)
Heavy duty gear puller (Appendix E, Item 102)
(para. 4-43).
Dial indicator (Appendix E, Item 36)
Rear cover and oil seal removed (para. 4-44).
Torque wrench (Appendix E, Item 144)
GENERAL SAFETY INSTRUCTIONS
Feeler gauge
Drycleaning solvent is flammable and toxic. Do
Prybar
not use near open flame.
Soft-head hammer
Keep fire extinguisher nearby when using
Nylon brush
drycleaning solvent.
MATERIALS/PARTS
Eyeshields must be worn when cleaning with
compressed air. Compressed air source will not
Dowel pin (Appendix D, Item 99)
Crankshaft main bearing set
exceed 30 psi (207 kPa).
Drycleaning solvent (Appendix C, Item 71)
GAA grease (Appendix C, Item 28)
Lubricating oil (Appendix C, Item 50)
Plastigage (Appendix C, Item 55)
Crocus cloth (Appendix C, Item 20)
a. Check End Play
1.
Position engine block (2) so crankshaft (1) is facing upward.
2.
Install dial indicator on engine block (2) with plunger on face of crankshaft gear (3).
3.
Move crankshaft (1) towards rear of engine block (2) using prybar.
4.
Set dial indicator to zero.
5.
Move crankshaft (1) toward front of engine block (2) using prybar. Record dial indicator reading.
6.
Replace thrust bearing in subtasks b and f if crankshaft (1) end play is not between 0.006-0.013 in.
(0.152-0.330 mm).
5-196
