I tried to post a pictorial of the hydro system but it won't work.
Go to the IH parts page and type in 300 then scroll to the U and hydraulics.
The link below may work.
The pump is more than likely the problem. If you have the aluminum pump they usually cannot be rebuilt.
BUT, I had a similar problem with my case 1030 and it was the relief valve sticking and NOT the pump. All I did was take the relief valve out and clean it and put it back in and it works fine.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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