Re: any way to lock the rear end

Posted by Hugh MacKay on February 18, 2006 at 08:34:18 from (216.208.58.161):

In Reply to: any way to lock the rear end posted by sicktight722 on February 17, 2006 at 12:24:46:

Some tractors had diffential locks, most came along well after the Super A. It was never engineered into those models not even the 100, 130 or 140 that followed. Most of the first diff locks we saw came on European tractors and most were Ford & Fergie type utilities. They didn't have the weight distribution to pull much of anything without it.

Diff lock in my opinion has never been what it was built up to be, unless you doing loader work or other type work where front end couldn't slip sideways. Often times on slipery surfaces, and being a solid lock, the wheel getting the best traction would turn light tractors crossways. Big tractors later on were a bit different, they had weight, and the lock was actually a clutch that could slip.

Most American built small tractors would outpull European tractors the same size and larger without diff lock, even when the European tractor used the diff lock. Just to give you an example I once saw a Farmall 130 hooked tail to tail with a David Brown 990 (52hp). Farmall had wheel weights and chloride, while the DB had no added weight, but still a much larger tractor than the 130 at 22hp. On a hard road the 130 pulled the DB backwards both wheels spinning. The guy on the Farmall could depress his clutch, let the DB take him freely backwards, but soon as he dropped the clutch the direction changed.

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