United States 84V032000
Mack Trucks, Inc.
The problem
FRONT AXLE AIR BRAKE LINES ARE ROUTED TOO CLOSE TO THE ENGINE EXHAUST MANIFOLD. THIS CAN PERMIT BRAKE LINES TO MELT AND RUPTURE, CAUSING A REDUCTION IN AIR PRESSURE TO BRAKE CHAMBERS UPON BRAKE APPLICATION.
What owners should do
FRONT AXLE AIR BRAKE LINES WILL BE REPLACED, EMPLOYING NEW ROUTING AND HEAT RESISTANCE IMPROVEMENTS.
Units 1163