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 606 of 1313

FIELD MAINTENANCE

WINCH DOES NOT OPERATE

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

References (cont.)

Volume 4, WP

0668

Volume 4, WP

0683

Volume 4, WP

0694

Volume 4, WP

0704

Volume 4, WP

0707

Volume 5, WP

0820

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

WINCH DOES NOT OPERATE

NOTE

Conduct these malfunction tests if front winch does not operate. This procedure will check

for proper oil level, power takeoff linkage for breaks and adjustment, drum clutch engaged,

drum lock pulled out, damaged winch control cable, oil lines for damage and leaks, return

line oil filter for leaks, hydraulic oil tank filter, oil pump for leaks and overheating, and winch

motor for leaks.

TM 9-2320-272-23-1

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