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 868 of 991
4-26. ENGINE
TM 9-2320-272-24-2
THIS TASK COVERS:
a. Accessory Drive Pulley Removal
e. Accessory Drive Assembly
b. Accessory Drive Removal
f. Accessory Drive Installation
c. Accessory Drive Disassembly
g. Accessory Drive Pulley Installation
d. Accessory Drive Cleaning and Inspection
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
M939/A1
TM 9-2320-272-24P
SPECIAL TOOLS
EQUIPMENT CONDITION
Mechanical puller kit (Appendix E, Item 102)
Air compressor removed (para. 4-31).
TOOLS
Power steering drivebelts removed (para. 3-230).
General mechanic’s tool kit (Appendix E, Item 1)
Radiator removed (para. 3-59).
Water pump drivebelt removed (para. 3-67).
Dial indicator (Appendix E, Item 36)
Inside micrometer (Appendix E, Item 82)
Outside micrometer (Appendix E, Item 80)
Torque wrench (Appendix E, Item 144)
Arbor press
Soft-faced hammer
MATERIALS/PARTS
GENERAL SAFETY INSTRUCTIONS
Keep fire extinguisher nearby when using
drycleaning solvent.
Drycleaning solvent is flammable and toxic. Do
not use near an open flame.
When cleaning with compressed air, wear
eyeshields and ensure source pressure does not
Five screw-assembled lockwashers (Appendix D,
Item 589)
exceed 30 psi (207 kPa).
Gasket (Appendix D, Item 243)
Gasket (Appendix D, Item 183)
Dowel pin (Appendix D, Item 97)
Antiseize tape (Appendix C, Item 72)
GAA grease (Appendix C, Item 28)
1.
Remove nut (6) and washer (5) from accessory drive pulley (2).
2.
Using mechanical puller, remove accessory drive pulley (2) from accessory driveshaft (4).
3.
Remove gasket (1) from accessory drive pulley (2). Discard gasket (1).
NOTE
Perform step 4 only if dowel pin is damaged.
4.
Remove dowel pin (3) from accessory driveshaft (4). Discard dowel pin (3).
1.
Remove five screw-assembled lockwashers (9) from accessory drive front flange (10). Discard screw-
assembled lockwashers (9).
2.
Using soft-faced hammer, loosen accessory drive housing (8) and gasket (7) from engine block
gearcase (11) and remove housing (8) and gasket (7) from gearcase (11). Discard gasket (7) and clean
gasket remains from mating surfaces of accessory drive housing and engine block gearcase.
4-186
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