United States 93V070000
FREIGHTLINER LLC
The problem
THE EXHAUST PORT IN THE UP POSITION ALLOWS WATER TO ENTER THE AIR BRAKE SYSTEM, WHICH CAN BLOCK THE AIR BRAKE SYSTEM IN FREEZING CONDITIONS.
Risk
BLOCKAGES IN THE AIR BRAKE SYSTEM CAN BLOCK THE EXHAUSTFROM THE BRAKE CHAMBERS AFTER SERVICE BRAKE APPLICATION, CAUSING THE BRAKES TODRAG AND POSSIBLY OVERHEAT ON EITHER SIDE OF THE DRIVE AXLES. THIS COULDINCREASE STOPPING DISTANCE AND RESULT IN A VEHICLE ACCIDENT.
What owners should do
INVERT THE BRAKE VALVES SO THE EXHAUST PORTS ARE DOWN.
Units 160