Vehicle recall 75V141000 · July 24, 1975

Mack RL, RS and 2 more models

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

Notes: Mack campaign no sco-63.TRUCKS mfg'd DEC.12, 1974 thru June 30, 1975.POSSIBILITY that the trailer supply control valve exhaust port was inadvertenlyplugged, and the safety valve on the air reservoir may have been omitted.ifthis condition exists it could lead to intermittent lockup of the trailerbrakes and difficulty in charging the trailer brake air system.(correct byinspecting and installing valve and unplug control valve).

Recall details

NHTSA campaign: 75V141000
Reported to NHTSA: July 24, 1975
Filed by: MACK TRUCKS, INCORPORATED
Owner notification: November 17, 1975
Vehicles potentially affected: 935
Initiated by: the manufacturer
Components: Service brakes, air › Supply › Check valve

Recall 75V141000 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 RL (1974-1975): 1975, 1974
Mack RS (1974-1975): 1975, 1974
Mack WL (1974-1975): 1975, 1974
Mack WS (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.

Check your VIN with NHTSA

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