Recall 77V186000
Service Brakes, Air › Supply — Motor Coach · reported 25 Oct 1977 · 1,182 vehicles potentially affected
What's wrong
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.
The fix
THE DEALER WILL REPLACE ALL DEFECTIVE "O" RINGS WITH ONES HAVING EXTREME COLD RESISTANCE PROPERTIES.
VEHICLE DESCRIPTION: MOTOR HOMES EQUIPPED WITH NEW SHUTTLE VALVES.SYSTEM: SERVICE BRAKES; AIR CONTROL VALVE.CONSEQUENCES OF DEFECT: IN THIS EVENT, THE BRAKES ONCE "ON" WILL NOT RELEASEAND LOSS OF VEHICLE CONTROL AND AN ACCIDENT COULD RESULT.NOTE: DRIVER SHOULD BE ALERTED TO THIS CONDITION BY A FLASHING LIGHT, BUZZER,AND A LOW READING ON THE AIR GAUGE.
Vehicles covered by this recall
Whether a particular car is affected and still unrepaired depends on its VIN — a model year being listed does not mean every car of that year is included. Check any VIN free on CarLogs, or at nhtsa.gov/recalls.
Is this car's recall fixed?
Recall repairs are free at any franchised dealer, for the life of the vehicle. A CarLogs report shows the recall status for a specific VIN as reported by the manufacturer — whether it's open or repaired, and whether the fix is available yet.
Source: NHTSA Office of Defects Investigation recall database. Look up another campaign →