TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 432 of 1313
FIELD MAINTENANCE
ENGINE OVERHEATS
INITIAL SETUP:
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(Volume 5, WP
0826, Table 1, Item 56)
Test Set, Electronic Systems
(Volume 5, WP
0826, Table 1, Item 51)
Personnel Required
(2)
References
Point to Point Schematics
TM 9-2320-272-10
WP
0106
WP
0131
Volume 2, WP
0229
Volume 2, WP
0233
Volume 2, WP
0249
Volume 2, WP
0278
Volume 2, WP
0280
Volume 2, WP
0281
References (cont.)
Volume 2, WP
0283
Volume 2, WP
0284
Volume 2, WP
0285
Volume 2, WP
0286
Volume 2, WP
0287
Volume 2, WP
0293
Volume 2, WP
0294
Volume 2, WP
0296
Volume 2, WP
0297
Volume 2, WP
0298
Volume 2, WP
0299
Volume 2, WP
0334
Volume 3, WP
0447
Volume 3, WP
0448
Volume 5, WP
0820
Equipment Condition
Vehicle parked and engine shut down.
(TM
9-2320-272-10)
TROUBLESHOOTING PROCEDURE
ENGINE OVERHEATS
NOTE
Conduct these malfunction tests if engine overheats. This procedure will check for improper
coolant level, oil level, faulty fan drivebelts, radiator and radiator hoses for leaks and damage,
cooling system for clogging, radiator fan for cracked blades, fan clutch, water pump and
temperature gauge for malfunctions.
TM 9-2320-272-23-1
0028
0028-1
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