Re: Front tires for IH 966

Posted by Owen Aaland on February 27, 2007 at 22:49:05 from (65.165.246.11):

In Reply to: Re: Front tires for IH 966 posted by Cliff Neubauer on February 27, 2007 at 16:40:00:

Front axles are designed so that a line from the top down through the spindle pivot would extend down to meet the ground at the center of the tire tread. If set up like this, when the wheels are turned, they can pivot on this line. Using larger tires, or more of a rim offset, can move the tire out from this pivot point. When that happens it greatly increases the effort needed to turn the wheels since they now have to move in an arc rather than just pivoting. Also by moving the tires out you greatly increase the load on the wheel bearings because the wheel assembly acts like a lever rather than just pushing straight up through the spindle. Reversing the dish on the wheels and using a loader and you are almost sure to have broken spindles and/or bearing problems.

A larger diameter tire will raise the axle up so that the center line of the spindle moves out from the center of the tractor so that you can now run a wider tire without increasing the load on the spindle or bearings.

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