I am trying to find a different throttle shaft for my 560 Diesel to get it going again and have called U.S. Diesel in Texas several times looking for this part and some others and am not getting any return phone calls. I ordered some parts about two months ago and was well pleased with my service but now all of a sudden when I call they take my information and what I need and never return my call. Is there somewhere else I can get the throttle shaft that enyone might know of? I called Steel Wheel Ranch today and they will only sell a complete used pump which is what I am afraid I am going to run into with most salvage yards. I tryed my CASEIH dealer and the part is in there system but its NLA. Any help would be great as I really need to get this tractor going by the end of the coming weekend.