Vehicle recall 78V008000 · January 16, 1978
1976-1977 TMC MC8
The involved vehicles may not comply with federal motor vehicle safety standard no. 121, "modulated emergency braking".
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- 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.
- Remedy
- The dealer will replace the two neoprene washers with glass filled teflon washers that will not be affected by cold climates.
- Notes
- Vehicle description: buses.system: emergency brakes; shuttle valve.consequences of defect: should the emergency brakes become locked duringvehicle operation, loss of vehicle control and an accident could result.
Recall details
- NHTSA campaign
- 78V008000
- Reported to NHTSA
- January 16, 1978
- Filed by
- TRANSIT MANUFACTURING,INC
- Owner notification
- November 30, 1977
- Vehicles potentially affected
- 527
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Supply
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
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