United States 92V146000
STEWART & STEVENSON SERV.
The problem
THE ROLL PIN USED TO ATTACH THE U-JOINT TO THE STEERING SHAFT CAN "BACK OUT" OF ITS POSITION AND SHEAR.
Risk
SHEARING OF THE ROLL PIN CAUSES THE U-JOINT/STEERINGDRIVESHAFT ATTACHMENT TO FAIL AND DROP BELOW ITS NORMAL POSITION, RESULTINGIN LOSS OF STEERING CONTROL.
What owners should do
A BOLT AND NUT ARRANGEMENT WILL BE ADDED FOR PROTECTION AGAINST THE PIN FAILURE.
Units 28