Real easy to adjust. I made up a tester using a pioner male end, reducer, 6 inch nipple, 1/4 inch coupler and and old airco oxygen regulator gauge. The adjustment is on outside of the hydraulic pump. It is on the upper front part of the pump. There maybe a wire twist lock on it Use a big screw driver to turn it out for less pressure. If it has not been touched for a long time you may have to use a torch to help it along. Also, have had some foreign material get in it. If you have to take it off(4 sllen bolts, make sure you have an extra gasket and 2 little orings that go between the valve and pump. The gasket is paper thin and almost always tears. If this does not help, there is a wealth of knowledge on the Oliver board. I still have a few Whites left with more than 10 to 12,000 hours. Bought my first one in 1976. They have been good tractors and fairly economical to keep running. I have never blown out a coupler. Pioneer uses 2 or three styles. Maybe you have a mismatch. I take that back I had one fall off and it rubbed part of ball off on road pavement. ps If You need any parts and can not find them anywhere else, shoot me an email. I still could spare a few.
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Today's Featured Article - Field Modifications (Sins of the Farmer) - by Staff. Picture a new Chevrolet driving down the street without it's grill, right fender and trunk lid. Imagine a crude hole made in the hood to accommodate a new taller air cleaner, the fender wells cut away to make way for larger tires, and half of a sliding glass door used to replace the windshield. Top that off with an old set of '36 Ford headlight shells bolted to the hood. Pretty unlikely for a car... but for a tractor, this is pretty normal. It seems that more often than not they a
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