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Harry Ferguson Tractors Discussion Forum
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TO30 Hydraulics

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Moye

04-08-2005 09:54:51




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Just did some research in the archives, but did not find an answer, so here goes. The lift lever in the quadrant only moves about halfway from bottom to top before the lift is all the way up. I can continue to move it, but it does no good. The book said to loosen the quadrant and slide it forward or backward until lift started down when leaver was about 2 1/2 inches from top. Mine starts down about 6 inches from top, and the quadrant is slid as for forward as it will go. Also, when it starts down, it does not stop. The only control is how fast it goes down. As you can imagine, this causes big problems with the bottom plows. Haven"t tried it on the cultivators yet. By the way, the tractor set under an oak tree from 1972 until Christmas when I finally got it running again. Any help will be appriciated. Moye

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Moye

04-10-2005 09:23:01




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 Re: TO30 Hydraulics in reply to Moye, 04-08-2005 09:54:51  
Many thanks for the replies! I checked and adjusted the spring first. Can you get it too loose? I may have went a half turn too far. As for the other suggestions, I'll check on them tomorrow.



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John(UK)

04-11-2005 14:21:33




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 Re: TO30 Hydraulics in reply to Moye, 04-10-2005 09:23:01  
Yes you can have it too loose, if it is it will not control the depth evenly. With the plow attached and lifted you should just be able to turn it if you grip it with your hand.



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Sodbuster

04-10-2005 19:07:38




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 Re: TO30 Hydraulics in reply to Moye, 04-10-2005 09:23:01  
With the lift raised with a heavy implement attached, should only be able to barely turn the spring with your thumb and forefinger. Should be no forward or backward movement in spring (no free end play). Turn the "Yoke" in or out to adjust. Hope this helps..... ..... .



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Sodbuster

04-08-2005 15:02:50




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 Re: TO30 Hydraulics in reply to Moye, 04-08-2005 09:54:51  
My T0-30 was doing the same thing. Turned out to be both the Quadrant Shaft and the Hand Control Fork which the shaft rotates against. Take out the four Quadrant bolts, pull the quadrant out and inspect the shaft. If you have a digital camera, place it close to the port and snap a few photos of the Hand fork Control. You will be able to see if it is worn down or gone. (Hard to see inside the port because of the closeness). If the flat surface of the Hand Fork Control is a half moon shape or you don"t see one, it is gone, Kaput. Should be a "Flat" surface. To replace it, you will have to pull the lift cover. Should have a manual to show you how. First of all, check out what John (UK) told you, that can also cause the same problem. Hope this helps..... .

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John(UK)

04-08-2005 11:26:00




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 Re: TO30 Hydraulics in reply to Moye, 04-08-2005 09:54:51  
Have you got any play in the Control Spring behind the seat, you should be just able to turn the spring with an implement raised, if there is any end float this will cause problems with the Quadrant lever too as they are connected through the Control Valve linkage. If you need more information about this and possibly stripping it down; mail me at : - fergusontractors at tiscali dot co dot uk
and I will send you some information sheets on what to do and how to do it.

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Jim W

04-08-2005 10:11:26




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 Re: TO30 Hydraulics in reply to Moye, 04-08-2005 09:54:51  
There can be considerable wear inside, which takes you beyond the range of adjustment. I have seen two scenarios:
1. The round arm on the inboard end of the quadrant lever can wear. You can build this up by welding, then grinding back to shape.
1 b) There is a little plate at the top of the control linkage (inside) and it can wear, where the round arm mentioned above contacts it. I have seen these worn quite severely, and 2. in one case I have seen where the plate was gone altogether. We made up a new plate and welded it on and now all is well.

Dealing with the quadrant arm is easy enough as the whole assembly can be withdrawn; it's not attached inside. If you need to deal with the linkage inside, you have to remove the lift cover, and this is a job that will take some time.
Jim

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