Motor Coach Industries, Inc: Safety Recalls in 1977

Updated on March 19, 2026.

There was 1 safety recall made by Motor Coach Industries, Inc in 1977. See the detail of the recall below.

You can also see similar information for other manufacturers.

Data Source: NHTSA.

See this for other years:

October 25, 1977

(Campaign #: NR (Not Reported))

BRAKES:AIR CONTROL VALVE

THE INVOLVED VEHICLES DO NOT CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS". THE TWO "O" RINGS THAT ARE SUPPLIED ALONG WITH THE NEW SHUTTLE VALVES ARE OF A BUNA "V" QUALITY. THESE RINGS ARE FULLY FUNCTIONAL IN NORMAL CLIMATE CONDITIONS, HOWEVER, IN EXTREMELY COLD ENVIRONMENTS, SLIGHT LEAKS MAY DEVELOP. THIS VALVE ACTS AS A SEAL BETWEEN THE CYLINDER HEADS OF THE SHUTTLE VALVE AND THE PISTON. IN TIME THIS SEAL MAY EXPAND OR "PUCKER UP", MAKING IT POSSIBLE FOR THE SHUTTLE TO BECOME TRAPPED IN AN EMERGENCY BRAKING SITUATION.

NHTSA ID: 77V186000

Component: SERVICE BRAKES, AIR

# of Units Affected: 1,182

Consequence Summary:

Corrective Action:

THE DEALER WILL REPLACE ALL DEFECTIVE "O" RINGS WITH ONES HAVING EXTREME COLD RESISTANCE PROPERTIES.

Park Outside Advisory: No

Do not Drive Advisory: No

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