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 1092 of 1313

FIELD MAINTENANCE

AIR PRESSURE EXCEEDS MAXIMUM (GAUGES SHOW OVER 130 PSI [896 KPA]), SAFETY VALVE OPENS

TO RELEASE PRESSURE

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanic's: Automotive

(Volume 5, WP

0826, Table 1, Item 56)

Gauge, Pressure

(Volume 5, WP

0826, Table 1, Item 19)

Test Set, Electronic Systems

(Volume 5, WP

0826, Table 1, Item 51)

Personnel Required

(2)

References

Point to Point Schematics

References (cont.)

Volume 3, WP

0436

Volume 5, WP

0805

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

AIR PRESSURE EXCEEDS MAXIMUM (GAUGES SHOW OVER 130 PSI [896 KPA]), SAFETY VALVE OPENS

TO RELEASE PRESSURE

NOTE

Conduct these malfunction tests if air pressure exceeds maximum (gauges show over

130

psi), safety valve opens to release pressure.

TM 9-2320-272-23-1

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