MACK R 1989: STEERING:GEAR BOX:SHAFT SECTOR

General Information

NHTSA Campaign ID Number: 90V052000

Make Model Year
MACK R 1989
Date Owners Notified Date Received by ODI Date Added to Database
1990-06-14 1990-03-16 1990-03-28

Production Dates: 1989-06-01 - 1989-08-01

Manufacturers Involved: Mack Trucks, Inc.

Component: STEERING:GEAR BOX:SHAFT SECTOR

Potential Number Of Units Affected: 267

Report Initiator: MFR MFR Report

Summary

INTERFERENCE BETWEEN STEERING GEAR SECTOR SHAFT AND THE FRAME RAIL THROUGH HOLE CAN CAUSE SECTOR SHAFT WEAR AND CAN WEAKEN SHAFT CAUSE IT TO BREAK.

Consequence

SHAFT FAILURE DURING VEHICLE OPERATION WOULD CAUSE LOSS OF STEERING CONTROL AND A CRASH WITHOUT PRIOR WARNING.

Remedy

ENLARGE FRAME RAIL THROUGH HOLE TO PREVENT INTERFERENCE: REPLACE STEERING GEAR SECTOR SHAFT IF SCORED.

Notes

SYSTEM: STEERING GEAR SECTOR SHAFT.VEHICLE DESCRIPTION: HEAVY-DUTY TRUCKS.