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 1258 of 1313

CONTROL PANEL LIGHTS WORK, SYSTEM FAILS TO INFLATE OR DEFLATE - Continued

STEP

4.

IS THE AIR SUPPLY FROM THE VEHICLE AIR COMPRESSOR NORMAL?

a.

Start engine.

NOTE

If steady mode lights extinguish, air supply is normal.

b.

Repeat inflation sequence with engine running at 1000 rpm for three to five minutes.

CONDITION/INDICATION

IS THE AIR SUPPLY FROM THE VEHICLE AIR COMPRESSOR NORMAL?

DECISION

YES - Two steady mode lights are extinguished, go to Step (5).

NO - Two steady mode lights persist. Perform Air Pressure Builds Slowly troubleshooting (WP

0128).

TM 9-2320-272-23-1

0149

0149-5