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Harry Ferguson Tractors Discussion Forum

TO 20 lift arms, odd issue?

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09-18-2023 13:44:43

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I know that there have been a few posts already, but I can't seem to find my exact issue.

My 3 point raises all the way and will NOT come down.
I changed the transmission fluid, and when I removed the last plug, the little one on the right side of the pan, the lift arms came down.

I presume something somewhere is not allowing the pressure to be released, but I'm beating my head against bricks trying to figure it out.

Any advice would be appreciated!

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09-19-2023 19:20:35

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 Re: TO 20 lift arms, odd issue? in reply to GrayBlue2409, 09-18-2023 13:44:43  
You may have a stuck control valve or your control linkage maybe not be correctly configured.

WITH THE ENGINE SHUT DOWN, reach into the oil and feel the T shaped control valve. Both ends of the T should be in their respective sockets on the H shaped control fork and the control valve should EASILY move fore and aft about an inch. Look at the control linkages and verify that it is all hooked up correctly.

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09-19-2023 12:37:39

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 Re: TO 20 lift arms, odd issue? in reply to GrayBlue2409, 09-18-2023 13:44:43  
I appreciate the information.

How heavy will that top cover be? Can I unbolt it and lift it off, or will I need some kind of a lifting device, say an A frame and a come-along?

I actually bought this tractor from an ex father-in-law, it had been sitting for years. Once I get the clutch adjusted and the lift arms fixed I should be good to go.

This post was edited by GrayBlue2409 on 09/19/2023 at 12:40 pm.

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09-19-2023 08:54:12

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 Re: TO 20 lift arms, odd issue? in reply to GrayBlue2409, 09-18-2023 13:44:43  
The piston is stuck in the cylinder. You'll have to remove the top cover and free it up. That will be a good time to replace the old piston with one that uses an O ring and backup washer, sold on this site. If you park the tractor for extended periods, be sure to leave the lift arms down. That way. if the piston is sticking, hydraulic pressure will free it up.

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