MACK R SERIES 1976: STEERING:GEAR BOX (OTHER THAN RACK AND PINION)

General Information

NHTSA Campaign ID Number: 80V054000

Make Model Year
MACK R SERIES 1976
Date Owners Notified Date Received by ODI Date Added to Database
1981-01-31 1980-05-06 1980-05-16

Production Dates: 1976-07-01 - 1980-01-01

Manufacturers Involved: Mack Trucks, Inc.

Component: STEERING:GEAR BOX (OTHER THAN RACK AND PINION)

Potential Number Of Units Affected: 109

Report Initiator: ODI ODI Report

Summary

THE PREFABRICATED PINCH BOLT CLAMP AT THE LOWER STEERING SHAFT LOWER YOKE MAY NOT PERFORM ADEQUATELY WHEN TIGHTENED TO SPECIFICATIONS. THE CLAMP MAY THEN DEFORM AND LOSS OF CLAMPING FORCE AND STEERING SHAFT DISENGAGEMENT MAY RESULT.

Remedy

DEALER WILL RETROFIT WITH LOWER STEERING SHAFT LOWER YOKES THAT PROVIDE FOR INTEGRAL PINCH BOLT INSTALLATION IN PLACE OF PREVIOUS SEPARATELY FABRICATED CLAMP FOR THE PINCH BOLT.

Notes

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: STEERING; POWER STEERING SHAFT; FABRICATED PINCH BOLT CLAMP.CONSEQUENCES OF DEFECT: DISENGAGEMENT OF THE STEERING SHAFT MAY CAUSE LOSS OFVEHICLE CONTROL WITHOUT PRIOR WARNING AND, POSSIBLY, AN ACCIDENT.