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Recall campaign91V080000

Recall 91V080000: Mack trucks, incorporated

Steering › Hydraulic power assist system
Report received
May 23, 1991
Manufacturer
Mack trucks, incorporated
Potentially affected
35vehicles
Model years
—

Check your own vehicle. A recall applies only to vehicles within the affected build range. Enter your VIN at nhtsa.gov/recalls. Recall repairs are free at a franchised dealer.

What NHTSA recorded

Incorrect manufacture of the hydroboost cylinder allows the ball socket clamp to contact right side steering lever on an extreme left turn and cause flexing of the cylinder rod .

Possible consequence

This flexing can cause seal failure or cylinder failureof the hydroboost unit and result in loss of steering control and result in avehicle accident.

Remedy

Replace incorrectly built boost cylinders.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.