I have an L4310 and was trying to fix a small hydraulic oil leak and I think I may have inadvertently adjusted the HST controL lever. I believe I turned the nut identified by the blue arrow. I think by turning the nut, I brought the bolt down and when I started the tractor, it started moving forward when I partially released the clutch pedal. I probably turned the nut close to a full turn. I am looking for help in reversing the process. Thanks.