I have never seen spring length specs on these pumps. Of course all I ever did was go up to parts dept and get new ones . Could pretty well just look at them and tell if they were weak. Most all the time the check ball springs are weak. Later pumps had a little stop under the springs also so ball could not completely depress spring and block off oil out let which usually happens with cold thick oil making a loader drop part way and stop so you had to start the drop process over again. Far as putting them back together, I always did it myself, used a vise grip on the outer operating lever, locked the internal mechanism in raise position. Just takes some practice which I guess you hope you will never get. H was worse than M because it used a flimy gasket that you had to me very careful of . Also, make sure there is a gasket under the seat of the relief valve. I never liked to see much over 900 psi on the relief valve, more like 800 or you can strip the threads on the drive coupler. Lot of guys washer that relief valve which is of course is a real pain as you have to take most everything apart again to get at it . IH did show a test fixture for checking pressure without putting it back in tractor but I never saw one. Could write a couple of books on those pumps.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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