2290 pressure problems

About the "jerking"....Not sure if I understand your description exactly. The type of Bosch injection pump used on a 2290 can cause the engine to "lope" at low idle and load. A shop manual will show you how to adjust the idle and the supplementary idle screws. That might fix it.

I used to do time at a primarily Case CIH store. I think the problem is the reverse inertia when throttling down can cause the output shaft shift collar to disengage. There wasn't enough "slant" or "rake" engineered into the shifting parts. The quick fix is to install a much heavier spring...but make sure you eat your Wheaties before you flip shafts. Try to track down an old Case master mechanic. I don't think the stiffer spring is in the parts catalog. He will have run into this before.

I had forgotten about it until very early Deere 6000 and 7000 series tractors began doing the same thing. I think JD designers copied the 90 series Case PTO....all the way down to the original design flaw. If you've ever seen both of them apart, you'll know what I'm talking about. Deere's solution was to throw away $1000 worth of gears and install a set with the proper cut.

But I'm only going on memory here. The Mrs. says my memory is so good, I can remember things that haven't even happened yet.