MC8: SERVICE BRAKES, AIR:SUPPLY

Go Back To 1976 MOTOR COACH INDUSTRIES, INC Directory

NHTSA Campaign Number:	78V008000
Vehicle/Equipment Make:	TMC
Vehicle/Equipment Model:	MC8
Model Year:	1976
Manufacturer Campaign Number:
Manufacturer Component Description:	SERVICE BRAKES, AIR:SUPPLY
Manufacturers Involved in Recall:	TRANSIT MANUFACTURING,INC
Manufacturered:	19760801 - 19771001
Type of Report:	V (Vehicle, Equipment or Tire)
Potential Number of Units Affected:	527
Date Owner Notified By Manufacturer:	19771130
Recall Initiated By:	19771130
Manufacturer Responsible For Recall:	MOTOR COACH INDUSTRIES, INC
Report Received Date:	19780116
Record Creation Date:	19791012
Regulation Part Number:	571
Federal Motor Vehicle Safety Standard Number:	121
Defect Summary:	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.
Consequence Summary:
Corrective Summary:	THE DEALER WILL REPLACE THE TWO NEOPRENE WASHERS WITH GLASS FILLED TEFLON WASHERS THAT WILL NOT BE AFFECTED BY COLD CLIMATES.

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