MAINTENANCE OF AIR BRAKE KIT (M548A1) Continued
TREADLE VALVE PEDAL
Move the pedal and check for binding. The spring must return the pedal and valve to the closed position when you
release the pedal.
Look for signs of spring damage. If you find any, notify unit maintenance.
With the engine running, pressure should build up and stay between 85 and 105 psi (586 to 724
kpa). If you are using the air brakes with a towed load, make sure the compressor keeps the
pressure above 85 psi (586 kpa).
Check the air pressure gauge. If it reads below 60 psi (414 kpa), the warning light must be on.