TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 742 of 1015
TM 9-2320-272-24-1
3-140. TRANSMISSION OIL COOLER AND MOUNT (M939/A1) REPLACEMENT
THIS TASK COVERS:
a. Oil Cooler Removal
b. Oil Cooler Mount Removal
c. Oil Cooler Mount Installation
d. Oil Cooler Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
M939, M939A1
LO 9-2320-272-12
TOOLS
TM 9-2320-272-10
General mechanic’s tool kit (Appendix E, Item 1)
TM 9-2320-272-24P
EQUIPMENT CONDITION
MATERIALS/PARTS
Four locknuts (Appendix D, Item 291)
Four locknuts (Appendix D, Item 309)
Cap and plug set (Appendix C, Item 14)
Rag (Appendix C, Item 58)
l
Parking brake set (TM 9-2320-272-10).
l
Right splash shield removed (TM 9-2320-272-10).
l
Cooling system drained (para. 3-53).
a. Oil Cooler Removal
CAUTION
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Clean area around hoses before removal to prevent entry of dirt.
Damage may occur if dirt or dust enters the transmission.
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Cover or plug all open hoses and connections immediately after
disconnection to prevent contamination. Failure to do this may
result in transmission damage.
NOTE
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Have drainage container ready to catch oil and coolant.
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Tag hoses for installation.
1.
Loosen hose clamp (7) and remove coolant supply hose (8) from coolant inlet flange (6) and clamp (7)
from hose (8).
2.
Loosen hose clamp (15) and remove coolant return hose (1) from coolant outlet flange (14) and
clamp (15) from hose (1).
3.
Disconnect oil cooler-to-cooler filter supply hose (4) from elbow (5).
4.
Disconnect transmission-to-oil cooler supply hose (3) from elbow (2).
5.
Remove four locknuts (11), screws (13), washers (12), and oil cooler (10) from two mounts (9).
Discard locknuts (11) and empty coolant from oil cooler (10).
b. Oil Cooler Mount Removal
Remove four locknuts (16), screws (18), and two mounts (9) from frame rail (17). Discard locknuts (16).
c. Oil Cooler Mount Installation
Install two mounts (9) on frame rail (17) with four screws (18) and new locknuts (16).
3-378
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