I am still having problems with the Hydraulics on my 8N. I posted before and got some advice and here is what I did.
Relief valve. Removed and cleaned. The valve still seems to function and work fine.
Removed and cleaned valved and springs. I removed each of the valve clamps and cleaned the valves, springs, plugs, and chambers. I did not remove the champers from the pump. When I did this, I found one of the valve guides was bent and one intake valve would jam on the guide. I straighten the guide as best I could and hte valve would move freely over the guide. I reassembled both sides of the pump keeping the correct valves in the chambers.
Honed the ram cylinder and replace the rings on the piston
Replaced the cam follower pin
Readjusted the linkage like described in several post.
Washed the entire sump area with mineral spirits
Intake and exhaust control valve move in and out freely.
I refilled the sump with the correct oil and tested. Without the cover, I started the tractor and engaged the pump. Using a long screwdrive, I moved the control valve to see if any oil would get pushed up to the top of the feeder tube and I got nothing. The pump yokes were working back and forth, but nothing at the top. No turbulance in the oil exempt from the PTO shaft spinning. No air bubbles or anthing coming to the top. Does any one have any suggestions for what next? Where else could there be a problem? Would completely removing the pump and disassamble be next? Any advice at this point would be grealy appreciated as far as what to look for next.
Relief valve. Removed and cleaned. The valve still seems to function and work fine.
Removed and cleaned valved and springs. I removed each of the valve clamps and cleaned the valves, springs, plugs, and chambers. I did not remove the champers from the pump. When I did this, I found one of the valve guides was bent and one intake valve would jam on the guide. I straighten the guide as best I could and hte valve would move freely over the guide. I reassembled both sides of the pump keeping the correct valves in the chambers.
Honed the ram cylinder and replace the rings on the piston
Replaced the cam follower pin
Readjusted the linkage like described in several post.
Washed the entire sump area with mineral spirits
Intake and exhaust control valve move in and out freely.
I refilled the sump with the correct oil and tested. Without the cover, I started the tractor and engaged the pump. Using a long screwdrive, I moved the control valve to see if any oil would get pushed up to the top of the feeder tube and I got nothing. The pump yokes were working back and forth, but nothing at the top. No turbulance in the oil exempt from the PTO shaft spinning. No air bubbles or anthing coming to the top. Does any one have any suggestions for what next? Where else could there be a problem? Would completely removing the pump and disassamble be next? Any advice at this point would be grealy appreciated as far as what to look for next.