Vehicle recall 75V192000 · October 31, 1975

Mack DM, DMM and 6 more models

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

Notes: Mack campaign no n/a.trucks with dual brake treadle valve piping SEPT.1974AND MAR.31, 1975.POSSIBILITY that the primary and secondary air supplylines may have been connected in reverse at the dual brake treadle valve.thereversing of these supply lines does not in itself, affect vehicle braking ifboth the primary and secondary air supply systems have normal operating airpressure.however, in the event of loss of air pressure in either the primaryor secondary system, neither the primary nor secondary service brakes wouldfunction when applied.in this event, it would require manual application ofthe emergency spring brake to stop vehicle.(correct by inspecting andrerouting air supply piping as required to correct system).

Recall details

NHTSA campaign: 75V192000
Reported to NHTSA: October 31, 1975
Filed by: MACK TRUCKS, INCORPORATED
Owner notification: February 20, 1976
Vehicles potentially affected: 1,200
Initiated by: the manufacturer
Components: Service brakes, air › Supply › Hoses, lines/piping, and fittings

Recall 75V192000 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 DM (1974-1975): 1975, 1974
Mack DMM (1974-1975): 1975, 1974
Mack F (1974-1975): 1975, 1974
Mack MB (1975): 1975
Mack R (1974-1975): 1975, 1974
Mack RD (1974-1975): 1975, 1974
Mack RM (1974-1975): 1975, 1974
Mack U (1974-1975): 1975, 1974

Has your Mack been repaired?

Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.

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