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3 pt lifting problems continued.

A

asylum

Member
I've read a lot here and have posted for assitance. I'm still having difficulty.

With the tractor running I loosened the priming screw on the pump. I got a couple of bubbles. I turned it out to the point where it was almost all the way out. I can fill the pumping action on the screw and oil was seeping out and dripping down the side of the pump.

I tried compressed air as described in other posts. But still no lifting of the 3 pt.

What am I doing wrong?
 
With the plug almost completely out you should have oil pouring out all over the place. Get a barbed fitting that will screw in the hole and a piece of clear vinyl tubing about 4' long. Run the tubing from the pump to the fill port on the lift cover and start the engine up. You should have a solid, steady stream of fluid running through the hose. Did the seller tell you that this was a working pump when he sold it to you?
 
Since my post and your reply, I did go out there and take the hydraulic cover off the tractor. I cleaned out the little cylinder that is attached to the lift handle on the outside of the tractor. That thing was still full of old whitish oil. One of the two O rings on the rear casing were there, but I replaced them. Oil was full in one of the tubes comeing up from through the casing. I had fresh oil in the lower part of the hydraulic cover, but it is not getting to the bigger cylinder that pushes the 3 pt arms up.

I hope I'm not confusing anyone, but I also hope this narrows down the problem.

The pump pushes out quickly. I found out when I took the prime plug out. Oil all over my floor now... LOL

Thanks in advance for your help. I don't know what else to check. I've been messing with this all day and yesterday.
 
Yeah, he told me the pump was working and the way it pushed oil out of the prime pump I believe it is. I can get a barbed plug and clear hose and try this tomorrow, but I really don't think the pump is the problem. I suspect it is something in the hydraulic housing/cover.
 
If you plumb out of the pump bleeder with a short nipple, then an elbow, then another nipple into a ball valve, then into the hose barb and into the clear tubing to the fill port, you can check for bubbles, then close the valve and check for hydraulic lift. Just an option.

If you see bubbles, you likely have a blown seal in the pump. The bubbles might go away after you run the pump a bit, but will likely return after the tractor sits over night.
 
All I know is that if you have confirmed that the pump is indeed pumping then you need to rebuild the lift cover: new o-ring and backup ring on the piston, new o-ring on the unloading valve and check the cam follower pin for wear. Re-assemble everything using the I&T FO-20 manual instructions for making adjustments without the Nuday lift arm tool.
If the tractor had been sitting for a while there is a very strong chance that the unloading valve is stuck in its bore and cannot move. If the unloading valve doesn't move the lift doesn't work.
 
Thanks for your advice. I do suspect the lift cover. I have the FO-20 and have been reading through it. I will tear it apart again tomorrow. I assume parts are easy to obtain.

Yes, the guy I bought this from bought this tractor in 2007 and the lift did not work. As a matter of fact it had a backhoe on it, so the lift was never used.

Thanks
 
I just went through this with mine. See my post from 1-5, it's the last thread on page 7 right now. Tried to bleed the pump, the hose was pulsating but I didn't see any bubbles... until I shut it off. I took the pump apart and everything looked good and the balls were working fine. Put new O-rings in and bled it again. It worked. Lifts every time now but still chatters a little. I figure there's probably some air still dissolved in the fluid so it need to get hot for a while.
 
If you pull the PTO lever cover and look inside (with the tractor running) you may be able to see where the leak is. You may need a flash light and mirror. Worth a "look see" before you pull the top cover..

Most of the common parts are available.
 
UPDATE: I put a barbed fitting on the pump and ran a clear hose to the hydraulic housing. As soon as I started it oil started pumping. No air bubbles. So it has to be in the hydraulic lift cover. I am going to take it off and try to figure out what is wrong there.
 
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