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Message: <blockquote data-quote="Tazza" data-source="post: 3106" data-attributes="member: 82">Did you check the charge pressure at all? it plays a very important part of the hydrostatic pump, it needs the pressure there to hold the pistons in the rotating group backwards on the yoke (the part that the steering levers are attached to). Without the pressure, the shoe of the postons will not make contact to the yoke and it will feel like the steering linkage is broken. It will also not produce any pressure. Is there any noise when its trying to move? maybee like a hammering noise of the pistons onto the yoke? this should cause a fair amount ot vibration in the lever.Remove the charge pressure switch and install a pressure gauge from memory it should be around the 60-120 PSI mark, but every machine is different.I hope you get it all sorted out!</blockquote>