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 1202 of 1313

FIELD MAINTENANCE

FOUR PRESSURE MODE LIGHTS FLASHING

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanic's: Automotive

(Volume 5, WP

0826, Table 1, Item 56)

Goggles, Industrial

(Volume 5, WP

0826, Table 1, Item 20)

Multimeter

(Volume 5, WP

0826, Table 1, Item 34)

Soap Solution

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 3, WP

0481

Volume 3, WP

0482

Volume 3, WP

0487

Volume 3, WP

0490

Volume 3, WP

0491

Volume 5, WP

0805

Volume 5, WP

0810

Volume 5, WP

0813

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

FOUR PRESSURE MODE LIGHTS FLASHING

NOTE

Conduct these malfunction tests if four pressure mode lights flash. This procedure will check

for a problem with air lines between wheel valves and wheel rims, and between quick release

valves and pneumatic controller. It will also check for a faulty wheel valve, hub air seal, and

pneumatic controller.

TM 9-2320-272-23-1

0145

0145-1