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Mack R Series Recall 81V155: Steering:Gear Box:Shaft Pitman

NHTSA campaign 81V155, reported December 29, 1981, 225 vehicles potentially affected.

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The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 81V155MACK TRUCKS, INCORPORATED
Component
STEERING:GEAR BOX:SHAFT PITMAN
Problem
THE PITMAN ARM RETAINING BOLT MAY NOT HAVE BEEN TIGHTENED TO THE REQUIRED SPECIFICATIONS DUE TO A DESIGN CHANGE. INADEQUATE RETENTION OF THE BOLT TO THE OUTPUT SHAFT COULD ALLOW THE PITMAN ARM TO LOOSEN.
Risk
Remedy
THE DEALER WILL INSPECT AND, IF NECESSARY, RETORQUE THE RETAINING BOLT TO PROPER SPECIFICATIONS AT NO CHARGE.
Notes
VEHICLE DESCRIPTION: TRUCKS.SYSTEM: STEERING; PITMAN ARM RETAINING BOLTS.CONSEQUENCES OF DEFECT: SHOULD THIS LOOSE CONDITION GO UNCORRECTED, THE SPLINEDGROOVES ON THE OUTPUT SHAFT COULD WEAR SMOOTH, CAUSING LOSS OF STEERINGCONTROL, WITHOUT PRIOR WARNING, AND A VEHICLE ACCIDENT.

Affected vehicles

Mack MC Series1981
Mack MR Series1981
Mack R Series1981
Mack RD Series1981