Re: Hydros????

Posted by Owen Aaland on June 22, 2007 at 10:57:29 from (198.70.47.171):

In Reply to: Hydros???? posted by Paula Lichtenstein on June 22, 2007 at 08:08:17:

You can check out the hydro some under load with the brakes. The tractor need to be warmed up and the brakes in good shape. In low range, the hydro should be able to overpower the brakes with the lever in the blue range. As you move the lever farther forwards, if the brakes are in good shape, you should be able to stop the tractor as the hydro relief valve will open at about 5000PSI. When the relief valve opens, the engine should remain under load. Moving the lever back a little should allow the hydro to again overpower the brakes.

If when the tractor stops, the engine load is greatly released, and moving the lever back does not cause the hydro to again overpower the brakes, then the reason the tractor stopped is the slip plates in the hydro have been forced apart and oil is bypassing. When the load is released, the plates will again be pressed together and the tractor will pull again. This happens when the plates get worn and scored. The is cure for this is to rebuld the hydro unit.

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