9N Ford Hydraulics problem..

[Robert (AL)]

I recently replaced the top cylinder and installed a new piston, with o-ring and neoprene washer. Replaced the pto shaft. pulled and cleaned, and replaced gaskets on the
pump, added new gear oil. Now it will not work at all. If anyone has any thoughts about what may be the problem, please let me know.

 

[Bruce (VA)]

On what model tractor?
75 Tips

 

[Bruce (VA)]

Oooops..?.just saw 9N.


Is the control rod connected?



Does it move when you operate the touch control lever?
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[Robert (AL)]

The control valve is new and is moving in and out freely, while moving the touch control arm. I made very sure it was connected properly to the fork assembly.

 

[Bruce(VA)]

Ill assume youve removed the inspection plate and checked for leaks, right? Some times it has to burp some air. Turn the pto on, start the tractor and cycle the touch control lever a few times. Drive around a bit. Little it run a while with the pto engaged. Post back with results.
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[TheOldHokie]

(quoted from post at 19:23:19 08/17/18) The control valve is new and is moving in and out freely, while moving the touch control arm. I made very sure it was connected properly to the fork assembly.

At the risk of asking the obvious - PTO engaged?

TOH

 

[Robert (AL)]

Yes, the pto is new and turning freely.

 

[HCooke]

"Some times it has to burp some air."

That is my experience. Run it for ten minutes and see what happens. Before I place the top cover, I turn the PTO by hand. Some oil should come up the tube.

 

[Tim PloughNman Daley]

Did you replace the safety relief valve and clean the valve chambers? How long did you wait after doing all that and firing up the tractor? Sometimes with an oil change, you need to get the oil circulating a bit and warmed up first, and, be sure the PTO is engaged. What was wrong with old PTO shaft or did you simply want to install the 1-3/8" splined unit? Did you reconnect the wishbone' bracket? Sometimes it is the basic simple things that get overlooked.

Tim *PloughNman* Daley(MI)

 

[Robert (AL)]

I ran and drove it around for over 30 minutes, with no change.

 

[Robert (AL)]

I replaced the safety valve, cleaned the valve chambers, and connected the wishbone to the control valve. I changed the pto because I wanted the 1-3/8".

I drove the tractor around for over 30 minutes today, nothing changed. Won't lift the arms at all.

 

[Bruce (VA)]

I'll assume you've removed the inspection plate and checked for leaks, right?
75 Tips

 

[Robert (AL)]

yes, the fluid was calm; non pouring out of the top, like it was before the rebuild. When I pull the inspection plate again. I'm going to loosen the valve caps and pour some oil into each of them. What do you think?

 

[Bruce (VA)]

(quoted from post at 13:53:08 08/18/18) yes, the fluid was calm; non pouring out of the top, like it was before the rebuild. When I pull the inspection plate again. I'm going to loosen the valve caps and pour some oil into each of them. What do you think?

I'd be surprised of it helped. But go for it at this point.

 

[Robert (AL)]

Bruce, thanks for the help. If you think of anything else I could try, please let me know. I may have rebuild the pump! The parts looked good when I cleaned it.