My Farmall 400 is running at a lower RPM than it should (tach is broken, but I have estimated it at about 1300 high idle using a digital tach on the power steering pulley). A few weeks ago I noticed a lot of play in the speed control lever up at the steering wheel. I took the play out of that linkage so that the rod moves the linkages (on that side of the tractor) the way it should. However, when I try to adjust the engine RPM using the high idle screw in the governor, the governor does not react. I can turn that screw in or out almost all the way without the RPM changing. What might be causing this and what would be the next logical linkage or part to check for wear? Thank you for your time.
Sincerely,
Peter Markel
Sincerely,
Peter Markel