Owen Aaland said: (quoted from post at 14:02:09 12/15/14) Did the problem start after the filter was changed? If not is there damage to the filter cover?
The jerky hitch action could be an indication of air getting into the system. Air in the system would be one thing that could cause the symptoms of both loss of hydraulics and hydrostatic function. The PTO shaft drives the two hydraulic pumps but the hydro charge pump is driven by the hydro input shaft and should not be affected by loss of the other pumps.
The filter was changed by the owner of the tractor in an attempt to try to get the tractor to move again. There is no visible damage to the filter cover.
Now I'm understanding this more clearly I believe. Even if the PTO spins, that doesn't mean that the hydro input shaft is spinning, which should spin the hydrostatic propulsion charge pump.
This post was edited by RedBarnNate at 13:54:52 12/15/14 3 times.
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