MACK R SERIES 1976: STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM

General Information

NHTSA Campaign ID Number: 80V053000

Make Model Year
MACK R SERIES 1976
Date Owners Notified Date Received by ODI Date Added to Database
1980-12-15 1980-05-06 1980-07-31

Production Dates: 1968-10-01 - 1976-09-01

Manufacturers Involved: Mack Trucks, Inc.

Component: STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM

Potential Number Of Units Affected: 219

Report Initiator: MFR MFR Report

Summary

THE STEERING ARM MAY DEVELOP CRACKS DUE TO INSUFFICIENT FATIGUE LIFE IN THE MACHINE RADIUS OF THE TAPER AT THE STEERING KNUCKLE END.

Remedy

INSTALL STEERING ARMS THAT HAVE BEEN MAGNA-FLUX INSPECTED FOR CRACKS AND SHOT PEENED FOR IMPROVED FATIGUE LIFE. THIS WILL BE DONE WITHOUT CHARGE.

Notes

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: STEERING ASSEMBLY; STEERING ARM.CONSEQUENCES OF DEFECT: CONTINUED OPERATION COULD LEAD TO FAILURE OF THESTEERING ARM, LOSS OF STEERING CONTROL WITHOUT PRIOR WARNING, AND POTENTIAL FORVEHICLE ACCIDENT.