NHTSA Recall 77V119000
NHTSA Campaign Id 77V119000; Date: Aug. 10, 1977
Recalled Vehicles:
1977 Chevrolet C30; 1977 GMC C30
Component: Service Brakes, Hydraulic:power Assist:vacuum
Manufactured by: General Motors Corp.
Affected Units:: 1,232
Recall Summary:
On the involved vehicles, the nuts which attach the brake master cylinder to the hydro-boost unit may have been over-tightened. This could have caused stripped threads and cracked attaching flanges. Should these nuts fail, the parts may separate and loss of service brakes would result.
How to Fix:
Dealer will inspect for cracks in the attaching flanges; units with cracks present will be replaced. If no cracks are found, the studs will be removed and the holes drilled out. The unit will be reassembled using bolts and nuts in place of the existing studs.
Recall Notes:
Vehicle description: light trucks. System: service brakes; master cylinder to hydro-boost unit attaching nuts. Consequences of defect: loss of braking capability could occur without priorwarning and could cause loss of vehicle control and an accident.
Date Owners notified by Manufacturer: Aug 10, 1977
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