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 506 of 1015
3-49. REAR
TM 9-2320-272-24-1
THIS TASK COVERS:
a.
Removal
b.
Inspection
c. Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
All
TM 9-2320-272-10
TOOLS
TM 9-2320-272-24P
General mechanic’s tool kit (Appendix E, Item 1)
EQUIPMENT CONDITION
MATERIALS/PARTS
Parking brake set (TM 9-2320-272-10).
Two gaskets (Appendix D, Item 170)
GENERAL SAFETY INSTRUCTIONS
Two locknuts (Appendix D, Item 317)
Do not touch hot exhaust system components with
Two locknuts (Appendix D, Item 291)
bare hands.
Two locknuts (Appendix D, Item 294)
GAA grease (Appendix C, Item 28)
WARNING
Do not touch hot exhaust system components with bare hands.
Injury to personnel may result.
1.
Remove two screws (14) and heat shield (13) from cab heat shield brackets (7).
2.
Remove locknut (3), screw (20), exhaust pipe coupling clamp (4), and gasket (2) from muffler
flange (1). Discard locknut (3) and gasket (2).
3.
Remove locknut (12), screw (8), exhaust pipe coupling clamp (9), and gasket (10) from front exhaust
pipe flange (11). Discard locknut (12) and gasket (10).
4.
Remove two locknuts (15), screws (5), top support bracket (6), and rear exhaust pipe (19) from bottom
support bracket (6), muffler flange (11), and front exhaust pipe flange (11). Discard locknuts (15).
5.
Remove two locknuts (17), screws (16), and bottom support bracket (6) from crossmember (18).
Discard locknuts (17).
6.
Remove gasket remains from rear exhaust pipe (19) flange, front exhaust pipe flange (11), and
muffler flange (1).
Inspect rear exhaust pipe (19), front exhaust pipe flange (11), and muffler flange (1) for cracks. Replace if
cracked.
1.
Install bottom support bracket (6) on crossmember (18) with two screws (16) and new locknuts (17).
2.
Apply small amount of GAA grease on new gaskets (2) and (10), and position gaskets (2) and (10) on
muffler flange (1) and front exhaust pipe flange (11).
3.
Install rear exhaust pipe (19) on bottom support bracket (6) with top support bracket (6), two
screws (5), and new locknuts (15).
3-142
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