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TM 9-2320-270-10
Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
LOW AIR PRESSURE (Warning light and buzzer on) - CONTINUED
Step 4. Check position of TRAILER AlR Supply control (6) and parking
brake control (7).
If M911 Truck Tractor is not coupled to semitrailer, pull
TRAILER AIR SUPPLY control (6) and parking brake
control (7) out.
Step 5. If air pressure builds in the Tractor and Tractor is connected to a semi-
trailer, push semitrailer air supply control (6) in.
Step 6. Push parking brake control (7) in.
TA220922
3-25
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