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Harry Ferguson Tractors Discussion Forum
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lift problem (long post)

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mupton

09-21-2004 19:52:37




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I have a 52 TO-30, and I'm having trouble with the lift. It lifts fine, but it won't go down once the arms go up. After about 2 - 3 days, they will slowly drift down. Also, with the control lever in the down position, the arms slowly and erratically creep up. I can't figure out what's going wrong. I recently had to cut out and replace the PTO shaft because it was twisted. During that time, I disassembled the pump and cleaned it along with the rest of the inside of the tractor. During that time, I took the control valve out and took some 1200 grit sandpaper and polished all four sides to clean it up some. I now have the PTO lever cover off. If I lift the arms, and then shove the control forks back with a screwdriver, the lift arms go down. If you let off the control forks, the arms stop immediately. With the lift arms in the up position and I move the control lever to the down position, the control forks will begin to move to the back of the tractor. The arms fall about 2-3 inches. Then for some reason the control forks move back forward, and this stops everything unless I manually move the forks with a screwdriver. I'm at a loss now. The lift is stronger than before. It will lift my 6 foot disc with no problem, and as a matter of fact, the disc is the only thing that will make the lift arms come down when you push the control levers down. I also refilled the tractor with thte correct GL1 fluid from NAPA, which is much thicker than what was in it. I don't understand what's wrong. Everything worked fine before I installed the new PTO shaft and cleaned the inside of the tractor. I am to the point that I am going to sell it and take the loss if I can't fix it because I am so frustrated with it. Thank you in advance.

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John (UK)

09-25-2004 14:42:02




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 Re: lift problem (long post) in reply to mupton, 09-21-2004 19:52:37  
Jim is right, it sounds like the Hydraulic Control quadrant requires adjusting just something else that can cause this is if the Control Spring behind the seat is out of adjustment, you should have no more than .020" end float in this, if you have more than that it will interfere with the quadrant adjustment and the depth control will be erratic. If you want instructions on how to set it all up, email me at fergusontractors at hotmail dot com and I will send it to you. It is nothing drastic that is wrong.

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ZANE

09-24-2004 18:10:32




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 Re: lift problem (long post) in reply to mupton, 09-21-2004 19:52:37  
I recently had a lift that would not go down and it ended up being foreign material stuck in the exhaust ports of the control valve bushing. Had to take the pump out and drive out the bushing and then dig the blue plactic bits out of the ports in the bushing.

If you can make yours move though with the screw driver I doubt that would be the problem. The one I was working on with the stuff stuck in the bushing ports wouldn't come down no matter where the control valve was placed.

Are you sure that the spring that is attached between the ram cylinder and the middle section of the control arms has enough tension on it???

Are you sure that the spring on the control valve itself is OK?

You need a ZANE THANG position control device on that tractor to give you positive position or height control of the lift arms.

Zane

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Jim W

09-22-2004 04:28:49




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 Re: lift problem (long post) in reply to mupton, 09-21-2004 19:52:37  
It sounds like there is not enough movement being effected by the quadrant lever mechanism on the control fork, at the top. When you move the quadrant lever forward, how far back does the control fork go? Once it's down, you shouldn't be able to move the fork back with your screwdriver; they should already be as far back as possible.
Jim



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Jim W

09-22-2004 04:32:44




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 Re: lift problem (long post) in reply to Jim W, 09-22-2004 04:28:49  
Whoops I hadn't read your message well when I posted - I think you need to adjust the position of the quadrant. The four bolts that hold it on can be loosened, and the quadrant moved forward, as it has slots for the bolts rather than holes. This has the effect of pushing the fork farther back when you lower the control lever.
Jim



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