VEHICLE DESCRIPTION: YARD TRACTORS. AN AIR LINE FROM THE REAR BRAKE RESERVOIR TO THE FRONT SUPPLY PORT ON THE DUAL BRAKE VALVE AND THE AIR LINE FROM THE FRONT RESERVOIR TO THE REAR SUPPLY PORT ON THE DUAL BRAKE VALVE WERE INCORRECTLY ROUTED. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS."
RiskDIMINISHED BRAKING EFFORT COULD RESULT DUE TO THE INCORRECT ROUTING.
FixDEALERS WILL RE-ROUTE THE AIR LINES.