TM 9-2320-260-20
COMPRESSED AIR AND AIR-HYDRAULIC BRAKE SYSTEM
TROUBLESHOOTING SYMPTOM INDEX
TROUBLESHOOTING
MALFUNCTION
MALFUNCTION
PROCEDURE
NO.
PAGE
PARKING BRAKE
Parking brake does not hold vehicle.. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake drags and/or overheats . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR-HYDRAULIC BRAKE SYSTEM
Insufficient brakes (no apparent air system failure, air gage
at normal pressure, warning buzzer not sounding). . . . . . . . . . . . . . . .
Brakes drag (one wheel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes drag (all wheels) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake system does not operate properly when brakes are
applied or released . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uneven braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noisy brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle pulls to one side when braking. . . . . . . . . . . . . . . . . . . . . . . . . .
TRAILER BRAKES
Trailer brakes do not operate (M818, M819). . . . . . . . . . . . . . . . . . . . . .
COMPRESSED AIR SYSTEM
Air pressure does not build to normal operating pressure
(low air pressure buzzer sounds continuously). . . . . . . . . . . . . . . . . . .
Air pressure rises above normal operating pressure . . . . . . . . . . . . . . . .
Air pressure gage indicates low or no air pressure
(low air pressure warning buzzer does not sound) . . . . . . . . . . . . . . . .
Air pressure gage indicates normal operating pressure
(low air pressure buzzer does not shut off . . . . . . . . . . . . . . . . . . . . .
AIR-OPERATED ACCESSORIES
Windshield wipers inoperative or operate slowly
(air gage at normal operating pressure) . . . . . . . . . . . . . . . . . . . . . . .
Air horn does not work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING
Do not use compressed air or dry brush for cleaning when working
in areas of vehicle where asbestos brake lining dust may accumu-
late. Remove asbestos dust and other residue from these areas
using a soft bristle brush or cloth soaked with water. Breathing
asbestos dust may cause injury to personnel.
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