Did a little research, don't have the service bulletins on hydraulics that go back that far, however, did find out some thing I never came across before,in the online parts manuals, the 656 had a high capacity hyd system available that used the 17 gal pump and the larger hyd filter. I didn't realize that. Now this part I knew all along as I dealt with it, that after such and such serial number, IH switched from the standard 12 gal main pump and 7 gal hitch pump to a 17 gal and 9 gal pump, then used different pump mounting plate and drive gear, slowed pumps down to deliver same gal as smaller pump to reduce hyd noise. That part I knew . I saw some put in the larger pumps with the original gear and plate and the cavitation was terrible. Twelve and seven coming through the small filter was over done and then put seventeen and nine through same size filter, well, the larger filter would have really helped I am sure.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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