Vehicle recall 78V031000 · February 9, 1978

Mack F, R and 1 more model

The tee bracket, which is mounted on the front axle of the bogie, may fail due to vibration brought on by road surface irregularities.

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

Summary: 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.
Remedy: The dealer will replace the defective bracket with a redesigned version.
Notes: 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.

Recall details

NHTSA campaign: 78V031000
Reported to NHTSA: February 9, 1978
Filed by: MACK TRUCKS, INCORPORATED
Owner notification: August 16, 1978
Vehicles potentially affected: 33,000
Initiated by: the manufacturer
Components: Suspension › Multiple axle

Recall 78V031000 on nhtsa.gov, with the manufacturer’s documents

Vehicles covered

As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.

Mack F (1975-1978): 1978, 1977, 1976, 1975
Mack R (1975-1978): 1978, 1977, 1976, 1975
Mack U (1975-1978): 1978, 1977, 1976, 1975

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