NHTSA Campaign 91V080000

STEERING:HYDRAULIC POWER ASSIST SYSTEM

Issued by MACK TRUCKS, INCORPORATED · Reported May 23, 1991 · 35 vehicles affected

What's wrong

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 .

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.

Vehicles affected by this recall

Make Model Year Units
MACK CF 1988 35
MACK CF 1989 35

Source: NHTSA Campaign 91V080000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.