NHTSA safety recall
Recall 77V186000: SERVICE BRAKES, AIR:SUPPLY
MOTOR COACH IND., INC. · Reported to NHTSA Oct 25, 1977
Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.
Check a VIN on NHTSA.govWhat this recall covers
NHTSA's campaign record, quoted as published
The defect
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 remedy
THE DEALER WILL REPLACE ALL DEFECTIVE "O" RINGS WITH ONES HAVING EXTREME COLD RESISTANCE PROPERTIES.
Notes
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.
A safety recall is issued when a manufacturer or NHTSA determines that a vehicle has a safety-related defect or does not comply with a federal motor vehicle safety standard. Recall repairs are free. Whether a specific vehicle is covered depends on its VIN — a recall listed for a model year does not necessarily apply to every vehicle of that year.
Campaign details
Identifiers and dates as filed with NHTSA
- Manufacturer
- MOTOR COACH IND., INC.
- Manufacturer's campaign number
- Not recorded
- NHTSA campaign number
- 77V186000
- Units potentially affected
- 1,182
- Report received
- Oct 25, 1977
- Production range
- Not recorded
- Campaign type
- Vehicle
- Federal safety standard (FMVSS)
- 121
Vehicles covered
9 model years across 3 models
Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.