Posted by nybadlybent on February 09, 2014 at 11:18:05 from (74.79.159.227):
I have seen some post on this forum about using their tractors with front wheel assist and I am wondering what they are referring to. In my experience, front wheel assist refers to those front wheel drives that are actually driven by a hydraulic motor. John Deere did offer tractors with front wheel assist that used hydraulic motors, one on each front wheel, to provide some power to the front wheels. I have also seen the same setup on some other tractor brands, including Allis Chalmers. While this system did offer some help in slippery going they are limited by the size of the hydraulic pump and the hydraulic drive motors.
Four wheel drive tractors are more commonly called MFWD or mechanical front wheel drive and these are driven by a drive shaft that is in sync with the rear drive. The front wheels , when activated, will turn whenever the rear wheels do. They have a fair amount of pulling power and are a great help in slippery going as in mud and snow.
AWD, all wheel drive, is another term often used to describe tractors with front wheels that are powered but I was led to believe that this term was for those tractors where the front and rear wheels were powered at all time. These are the tractors with the same sized tires on the front as on the rear. Many of the articulated tractors are AWD.
In truth, I guess, all tractors with power to the front wheels could be called, front wheel assisted.
Another term for the hydraulic driven wheels is Mud Hog. These Mud Hog drives are widely used on the rear wheels of combines that have hydro drives. Again, they do help in slippery going but they often will stop turning.
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