Ellis Kinney
Well-known Member
At some point in the early years I think IH changed the speed of the lift all. As some of you know, I have been working on the pumps in my M's. I put a very early model pump in the M so I could use it while I rebuilt the pump original to the tractor. The very early pump (5028E) lifts much more quickly than the original pump (5028EA). I like the slower one much better. The only difference I have noticed is in the relief valve body components. A different relief valve spring sleeve. I have a 3 pt hitch and I am lifting at the same RPM and the same implement. This is something to think about if you are trying to rebuild a pump with parts from another pump. Ellis