Ok, on my 1066 Hydro, at low rpm the tractor seems to go fine. At higher rpm the tractor begins to slow down and if I back off the throttle, it picks power back up. The servo control pressure is good in neutral and drive. The charge circuit pressure in neutral is about 500 psi. In drive, it is about 50 psi. It should be 170-215 psi in drive. According to the manual, if low pressure in drive only, it could be the min regulating valve in the multi valve. There are no o-rings or anything in that valve. So, could it be a busted spring or something in the valve or is it more likely the charge pump is bad? It would seem to me if the neutral pressure is a healthy 500 psi, the charge pump should be good??? Hopefully someone will give me some direction on this...
Tom
Tom