OPERATE AIR BRAKE KIT (M548A1) Continued
Make sure you connect the air couplings; SERVICE to SERVICE and EMERGENCY to
Remove two dummy couplings. Connect carrier service and emergency air couplings to towed load service and
emergency air couplings.
Turn two air cutoff cocks at right angles to their air hoses. In this position, the cocks are open.
If pressure drops below 60 psi (8.7 kPa) or LOW PRESSURE warning light comes ON while
youre driving stop and fix problem.
After starting carrier engine, make sure air pressure gauge reaches 85 psi (12.3 kPa) before you drive carrier with a
towed load. LOW PRESSURE warning light must go OFF.
To slow or stop carrier, step on treadle valve pedal just before you apply differential brakes.