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NHTSA Campaign 78V008000

SERVICE BRAKES, AIR:SUPPLY

Issued by TRANSIT MANUFACTURING,INC · Reported Jan 16, 1978 · 527 vehicles affected

What's wrong

THE INVOLVED VEHICLES MAY NOT COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "MODULATED EMERGENCY BRAKING". THE "O" RINGS IN THE SHUTTLE VALVE MAY DEVELOP SLIGHT LEAKS IN COLD WEATHER. IN ADDITION, NEOPRENE WASHERS USED ON THESE "O" RINGS MAY EVENTUALLY EXPAND OR PUCKER IN COLD CLIMATES, MAKING IT POSSIBLE FOR THE SHUTTLE PISTON TO BECOME TRAPPED BY THE INNER-CIRCUMFERENCES OF THE WASHERS. THIS WOULD FORCE THE EMERGENCY BRAKES TO THE "ON" POSITION AND WOULD PREVENT THEM FROM BEING RELEASED.

Remedy

THE DEALER WILL REPLACE THE TWO NEOPRENE WASHERS WITH GLASS FILLED TEFLON WASHERS THAT WILL NOT BE AFFECTED BY COLD CLIMATES.

Vehicles affected by this recall

Make Model Year Units
TMC MC8 1976 527
TMC MC8 1977 527

Source: NHTSA Campaign 78V008000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.