MACK RL 1974: SERVICE BRAKES, AIR:DRUM:DRUM

General Information

NHTSA Campaign ID Number: 75V060000

Make Model Year
MACK RL 1974
Date Owners Notified Date Received by ODI Date Added to Database
1975-08-05 1975-04-15 1979-10-12

Production Dates: 1974-06-01 - 1978-03-01

Manufacturers Involved: Mack Trucks, Inc.

Component: SERVICE BRAKES, AIR:DRUM:DRUM

Potential Number Of Units Affected: 600

Report Initiator: MFR MFR Report

Notes

MACK CAMPAIGN NO N/A.TRUCKS MFG'D APRIL 1, 1974 THRU NOV.15, 1974.POSSIBILITY THAT ON MODELS WITH OUTBOARD-MOUNTED BRAKE DRUMS AND STEEL DISCWHEEL ON ALUMINUM WHEEL HUBS, THE MANUFACTURING TOLERANCES MAY CAUSE ANINTERFERENCE PROBLEM BETWEEN THE INSIDE PORTION OF WHEEL AND OUTER EDGE OF CASTDRUM.THIS CONDITION RESULTS IN OVERSTRESS OF WHEEL STUDS.THE FAILURE OFWHEEL STUDS COULD CAUSE SEPARATION OF DISC WHEEL FROM CHASSIS AND COULD CAUSELOSS OF VEHICLE CONTROL.'CORRECT BY INSPECTING AND ADJUSTING TO PRECLUDEINTERFERENCE WHERE NECESSARY'.