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 1182 of 1313
TWO PRESSURE MODES INDICATED WITH STEADY MODE LIGHTS - Continued
STEP
5.
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 (6).
NO - Two steady mode lights persist. Perform Air Pressure Builds Slowly troubleshooting (WP
0128).
STEP
6.
ARE THE AIR DRYER OR WATER SEPARATOR CLOGGED OR DAMAGED?
Check air dryer and water separator for clogs or damage.
T0414DAA
AIR
DRYER
WATER
SEPARATOR
Figure 4.
Air Dryer And Water Seperator.
CONDITION/INDICATION
ARE THE AIR DRYER OR WATER SEPARATOR CLOGGED OR DAMAGED?
DECISION
YES - If air dryer is clogged or damaged, go to Air Dryer Kit Replacement (Volume 5, WP
0806).
YES - If water separator is clogged or damaged, go to Water Separator Replacement (Volume 5, WP
0811).
NO - Go to Step (7).
TM 9-2320-272-23-1
0144
0144-5
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