PerfTech
Well Known Member
... I know that most people are aware of what I am writing about in this thread, but not everyone. In the course of performing our "Wheel Bearing Mod." over the last couple of years, and installing hundreds of tires we have become aware of something we want to share here. this may save some grief for a few guys. It appears that many (approx. 20% ) are not aware that the Matco wheels have a clocking mark (Photos below) that must be observed and lined up with the valve stem cutout when mounting your tires. The wheel halves will bolt together in three different positions with only one being correct. Every week we receive four or five that are clocked wrong, requiring us to dismount and remount the tires to correct this problem prior to us performing our machine work. When the tires are run with the wheel clocking off, the tires are often worn in with the error showing up as out of round tires and will definitely induce a shimmy into the nose gear. This clocking error also causes a misalignment of the bearing bores and will cause the bearings to bind up, inducing another possible shimmy. Also I want to point out that you can not mix up parts from two different wheels as they are machined as one unit and must stay together as a set. Thanks, Allan...
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