Vehicle recall 75V193000 · October 31, 1975

1974-1975 Mack F

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

Notes: Mack campaign no Q1012.TRUCKS SEPT.2, 1974 thru July 30, 1975.POSSIBILITYTHAT an error was made in the installation of the air supply piping to thetractor trailer park valve manifold.if this occurs, the primary air supplysystem becomes the sole source for supply air to the tractor trailer park valvein this condition, tractor or trailer brake operation is not affected, as longas the primary system has normal operating air pressure.however,in this couldbe hazardous to either the primary system, there will be a corresponding lossof air to the tractor trailer park VALVE0 and this valve, by design, willautomatically apply the emergency spring brakes, which then could only bereleased mechanically.an automatic application of the emergency spring brakeswould immobilize the vehicle and require mechanical release wheel by wheel.this could be hazordous to either the vehicle operator or to the individualreleasing the brakes.(correct by inspecting and changing piping to proper airsupply system).

Recall details

NHTSA campaign: 75V193000
Reported to NHTSA: October 31, 1975
Filed by: MACK TRUCKS, INCORPORATED
Owner notification: March 1, 1976
Vehicles potentially affected: 2,250
Initiated by: the manufacturer
Components: Service brakes, air › Supply › Hoses, lines/piping, and fittings

Recall 75V193000 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 (1974-1975): 1975, 1974

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