Defect summary
THE WHEEL STUD USED FOR THE HUBS ON THE REAR-STEER WHEELS HAS A DIAMETER TOO SMALL TO HANDLE THE MAXIMUM RECOMMENDED TORQUE, AND WILL SUFFER FROM A FATIGUE FAILURE FROM THE CYCLIC STRESSES OF VEHICLE USE AND THE TORQUING OF THE WHEEL NUT.
Consequence
FAILURE OF ONE WHEEL STUD CAN LEAD TO SUBSEQUENT FAILURESOF ALL THE STUDS ON THE HUB, LEADING TO SEPARATION OF THE WHEEL AND TIREASSEMBLY FROM A VEHICLE, RESULTING IN LOSS OF STEERING CONTROL AND AN ACCIDENT.
Remedy
REPLACE THE WHEEL STUD WITH A NEWER, WIDER DIAMETER WHEEL STUD.
Notes
SYSTEM: WHEELS.VEHICLE DESCRIPTION: HEAVY TRUCKS WITH REAR-STEER AXLES USED AS SNOW BLOWERS ORSNOW PLOWS.
Source: NHTSA ODI recalls file, campaign 91V221000. Text as published by NHTSA.