MACK R 1977: SUSPENSION:MULTIPLE AXLE

General Information

NHTSA Campaign ID Number: 78V031000

Make Model Year
MACK R 1977
Date Owners Notified Date Received by ODI Date Added to Database
1978-08-16 1978-02-09 1979-10-12

Production Dates: 1975-03-01 - 1978-02-01

Manufacturers Involved: Mack Trucks, Inc.

Component: SUSPENSION:MULTIPLE AXLE

Potential Number Of Units Affected: 33000

Report Initiator: MFR MFR Report

Summary

THE TEE BRACKET, WHICH IS MOUNTED ON THE FRONT AXLE OF THE BOGIE, MAY FAIL DUE TO VIBRATION BROUGHT ON BY ROAD SURFACE IRREGULARITIES. BRACKET FAILURE WOULD LEAVE THE TEE BRACKET UNSUPPORTED AND CAUSE BROKEN HOSE CONNECTOR FITTINGS. THIS WOULD RESULT IN AUTOMATIC APPLICATION OF THE SPRING EMERGENCY BRAKES.

Remedy

THE DEALER WILL REPLACE THE DEFECTIVE BRACKET WITH A REDESIGNED VERSION.

Notes

VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH HIGHWAY BOGIES.SYSTEM: SUSPENSION; TEE BRACKET.CONSEQUENCES OF DEFECT: AUTOMATIC APPLICATION OF THE SPRING EMERGENCY BRAKESCOULD CAUSE LOSS OF VEHICLE CONTROL AND AN ACCIDENT.