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Mack CF Recall 91V080: Steering:Hydraulic Power Assist System

NHTSA campaign 91V080, reported May 23, 1991, 35 vehicles potentially affected.

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The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 91V080MACK TRUCKS, INCORPORATED
Component
STEERING:HYDRAULIC POWER ASSIST SYSTEM
Problem
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 .
Risk
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.
Notes
SYSTEM: STEERING POWER ASSIST, HYDROBOOST ASSEMBLY.VEHICLE DESCRIPTION: CF AERIALSCOPE MODEL.

Affected vehicles

Mack CF19881989