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 672 of 1313

FIELD MAINTENANCE

WRECKER HYDRAULIC SYSTEM 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

References (cont.)

TM 9-2320-272-10

Volume 4, WP

0711

Volume 4, WP

0728

Volume 5, WP

0820

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

WRECKER HYDRAULIC SYSTEM DOES NOT OPERATE

NOTE

•

Conduct these malfunction tests if hydraulic system does not operate. This procedure

will check for improper oil level, power takeoff condition, hydraulic lines for leaks and oil

leaks from reservoir drain plug and valves.

•

Rear winch controls must be in neutral for crane operation.

TM 9-2320-272-23-1

0072

0072-1