THE FRONT AND REAR SERVICE BRAKE RESERVOIR IS PLUMBED SO A SINGLE POINT FAILURE CAN EMPTY BOTH RESERVOIRS. THIS PLUMBING ALLOWS AIR FROM THE WET TANK TO GO THROUGH ONE OF THE REAR SERVICE RESERVOIRS BEFORE ENTERING THE FRONT SYSTEM SERVICE RESERVOIR. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS."
Consequence
CONSEQUENCE OF NON-COMPLIANCE; IF A LINE WERE TO BREAK, A LEAK WOULD DISABLE BOTH FRONT AND REAR BRAKE SYSTEMS INCREASING THE POTENTIAL FOR A VEHICLE ACCIDENT.
Remedy
DEALERS WILL REPLUMB THE FRONT AND REAR AIR BRAKE RESERVOIR LINES.
SYSTEM: BRAKES; AIR; AIR SUPPLY; RESERVOIR; FMVSS NO.121.VEHICLE DESCRIPTION: TRUCK TRACTORS BUILT ON 29,000 POUND GROSS VEHICLE WEIGHT RATING CHASSIS AND EQUIPPED WITH HYDRAULICALLY MOVEABLE 5TH WHEELS.NOTE:OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CAPACITY AT 1-800-323-0135. ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-800-424-9393.
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