Motor Coach MC5B, MC5C, MC8 (1976-1978): Service brakes, air
Recall 77V186000 · Oct 25, 1977 · Motor Coach Ind., Inc.
1,182
vehicles affected
1,182
vehicles affected
Facts
- Recall number
- 77V186000
- Date
- Oct 25, 1977
- Maker
- Motor Coach Ind., Inc.
- Units affected
- 1,182
- Kind
- Vehicles
- Component
- Service brakes, air > Supply
- Model years
- 1976-1978
- Started by
- The maker
- Hazard
- Other or not stated
What is 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
Recall repairs are free of charge.
THE DEALER WILL REPLACE ALL DEFECTIVE "O" RINGS WITH ONES HAVING EXTREME COLD RESISTANCE PROPERTIES.
Vehicles covered
3 models, 9 model years in all
| Make | Model | Model years |
|---|---|---|
| Motor Coach | MC5B | 1976-1978 |
| Motor Coach | MC5C | 1976-1978 |
| Motor Coach | MC8 | 1976-1978 |
Related pages
Questions and answers
Which vehicles are in recall 77V186000?
3 models: Motor Coach MC5B (1976-1978), Motor Coach MC5C (1976-1978), Motor Coach MC8 (1976-1978), about 1,182 vehicles in all.
What is the fix for recall 77V186000?
THE DEALER WILL REPLACE ALL DEFECTIVE "O" RINGS WITH ONES HAVING EXTREME COLD RESISTANCE PROPERTIES.
A recall means the maker found a safety problem and offers a free fix; it does not mean every unit has the problem. Units affected are as reported by the company. Popular models sell more and so have more recalls and complaints. Official public data; texts are shortened. A dealer can tell whether a single vehicle still needs the repair.