Posted by Curtisk84 on April 10, 2012 at 21:07:30 from (206.126.211.71):
Hey guys, got a question for ya regarding the Hydro drive servo control. The hydro drive surges as much as one mph faster and then slows back down over and over at light load and high engine RPM. Seems to be the worst from just below the blue area of the speed control to right in the blue area. Under a heavy pull there is no surging. At half throttle there is no surging. I run in high range most of the time. Hydro seems to be healthy otherwise because it will pull the engine right down. Filters and fluids are changed on schedule. Has anyone seen this problem before on the hydro tractors? I also need to mention that the linkage from the lever going to the spool on the side of the transmission is tight. No play whatsoever in that linkage. Any ideas? Thanks
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