MACK HMM6856S 1974: STEERING:LINKAGES

General Information

NHTSA Campaign ID Number: 78V028000

Make Model Year
MACK HMM6856S 1974
Date Owners Notified Date Received by ODI Date Added to Database
1978-08-14 1978-02-09 1979-10-12

Production Dates: 1973-01-01 - 1977-01-01

Manufacturers Involved: Mack Trucks, Inc.

Component: STEERING:LINKAGES

Potential Number Of Units Affected: 100

Report Initiator: MFR MFR Report

Summary

THE STEERING PITMAN ARM IS SUBJECT TO FAILURE AT THE AREA OF THE TRANSITION TO THE ARM OFFSET DUE TO HIGH STRESS CONCENTRATIONS.

Remedy

DEALER WILL REPLACE THE STEERING PITMAN ARM, STEERING GEAR OUTPUT SHAFT AND STEERING GEAR MOUNTING BRACKET.

Notes

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: STEERING; STEERING PITMAN ARM.CONSEQUENCES OF DEFECT: PITMAN ARM FAILURE COULD CAUSE LOSS OF VEHICLE CONTROLWITHOUT PRIOR WARNING AND A POTENTIAL VEHICLE ACCIDENT.