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 320 of 991
TM 9-2320-272-24-2
3-379. VAN HEATER AND EXHAUST REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
APPLICABLE MODELS
M934/A1/A2
TOOLS
REFERENCES (TM)
TM 9-2320-272-10
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).
Battery ground cables disconnected (para. 3-126).
Seven lockwashers (Appendix D, Item 400)
Lockwasher (Appendix D, Item 418)
Four lockwashers (Appendix D, Item 348)
Antiseize tape (Appendix C, Item 72)
GENERAL SAFETY INSTRUCTIONS
Do not perform this procedure near open flames.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Remove eight screws (3), exhaust pipe (4), and two clamps (15) from van body (6) and heater
exhaust pipe (12).
Remove two screws (14). lockwashers (2), nuts (1), and clamps (15) from exhaust pipe (4). Discard
lockwashers (2).
NOTE
Tag all leads and lines for installation.
Remove nut (19) and fuel overflow line (23) from fitting (18).
Remove nut (24) and fuel receptacle line (25) from heater fuel valve (17).
Disconnect power receptacle connector (16) from heater (7).
Disconnect external fuel pump receptacle connector (26) from heater (7).
Disconnect room thermostat connector (27) from heater (7).
Remove four screws (8) and lockwashers (9) from heater bracket (10). Discard lockwashers (9).
Remove screw (22), ground strap (21), and lockwasher (20) from bracket (10) and heater (7). Discard
lockwasher (20).
NOTE
Assistant will help with step 10.
Remove heater (7) from van body (6).
I&move five screws (22) and lockwashers (20) from two brackets (10) and heater (7). Discard
lockwashers (20).
Remove heater exhaust pipe (12) from heater (7).
Remove four screws (5) and (13) and two seals (11) from van body (6).
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