NHTSA Campaign Id 78V031000; Date: Feb. 9, 1978
1975 Mack F; 1976 Mack F; 1977 Mack F; 1978 Mack F; 1975 Mack R; 1976 Mack R; 1977 Mack R; 1978 Mack R; 1975 Mack U; 1976 Mack U; 1977 Mack U; 1978 Mack U
Component: Suspension:multiple Axle
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 33,000
The tee bracket, which is mounted on the front axle of the bogie, may fail due to vibration brought on by road surface irregularities. Bracket failure would leave the tee bracket unsupported and cause broken hose connector fittings. This would result in automatic application of the spring emergency brakes.
The dealer will replace the defective bracket with a redesigned version.
Vehicle description: trucks equipped with highway bogies. System: suspension; tee bracket. Consequences of defect: automatic application of the spring emergency brakescould cause loss of vehicle control and an accident.
Date Owners notified by Manufacturer: Aug 16, 1978
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