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Harry Ferguson Tractors Discussion Forum
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TO20 Ferguson

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Ed Miller

12-28-2006 17:02:22




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A friend's TO20's 3 pt. won't lower. The first thing I did was remove the plug on the Right side of the top cover, and oil shot out which let the arms lower. The left side of the cover has a plug with a spring loaded valve of some kind. It is open and appears to be fine. I now have the cover off, and cleaned out the case. Any help with what keeps the 3 Pt. from lowering? I do not have a manual, but the inside looks almost identical to my 2N and 9N manual.

Thank you,
Ed

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John (UK)

12-29-2006 12:06:43




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 Re: TO20 Ferguson in reply to Ed Miller, 12-28-2006 17:02:22  
Are you sure it is a TO20, from your description of the spring loaded valve in the top left plug in the Top Cover it would appear to be a TEA as the TO tractors never had this fitted. Anyway the Hydraulics are more or less the same. As Jerry says, removing the Top Cover was not a good move as you can't run any tests with it stripped down because you can't pressurise the system. I would think from what you say that the Control Valve has stuck in it's Bush and just needs a little hand pressure to free it. The Control Valve is what the long Control Fork attaches to in the bottom of the Pump at the rear just above the large drain plug, just move it in and out by hand slowly until it is free and then rebuild it all. You could have done this without removing the Top Cover quite easily through one of the side panels. If the housing was very dirty then it is possible that the Pump has sucked something nasty into the Control Valve and it has stuck because of that. If you still have problems when it is back in one piece, email again telling us what you have done. Don't cover the gasket on the top cover with gasket cement, just use around the pressure point at the front right corner. Fit a new gasket if possible because of the pressure.
fergusontractors(at)tiscali.co.uk

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Ed Miller

01-05-2007 15:53:11




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 Re: TO20 Ferguson in reply to John (UK), 12-29-2006 12:06:43  
John in UK,
You're right, it is a TEA400336. This evening I found the control valve does move forwards and backwards freely. Is the spring the only thing between the valve and the wishbone? I hope I did not lose any parts. In my oil drain bucket, I found a 3/16" diameter pin 15/16" long with a hitch pin through one end. the other end tapers down to 1/16" or less and looks like it broke off of something. I can't find a home for it. Any ideas where it may have come from?
Thanks,
Ed

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John (UK)

01-06-2007 06:27:29




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 Re: TO20 Ferguson in reply to Ed Miller, 01-05-2007 15:53:11  
You made a big error, you didn't ask before you started work on it, what you have done is broken the little pintle shaft on the Control Valve, well that is what it sounds like from your description of the part and your question sort of confirms this. Always ask before you start work on any repairs, there is always someone who will willingly help you with advice on here. Fortunately it isn't all that expensive to repair it, just inconvenient. If you email me direct on:- fergusontractors(at)tiscali.co.uk so I have your email address then I will send you the information you need and some pictures of the part you have broken and what you need to do. Just explain it all again to me in your email so I have all the details and can send everything that you may need.....John

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Ed Miller

12-29-2006 14:53:00




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 Re: TO20 Ferguson in reply to John (UK), 12-29-2006 12:06:43  
I was told it was a TO20, but the tag is difficult to read. Thanks for your suggestion about the Contol Valve. I'll check it out in the next few days. I appreciate all the tips and advice. What did we do before we had the Net? Ed



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John (UK)

01-06-2007 06:32:27




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 Re: TO20 Ferguson in reply to Ed Miller, 12-29-2006 14:53:00  
Yes the net has certainly improved things for everyone. The fault that you had may be just that broken part, as it is operating the Control Valve and the description you gave was that the Valve didn't appear to be operating. Anyway read the other email I sent you and I will send you the pictures and information you need. A TO20 would have a different engine to your tractor, the rest would be more or less the same....John

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John (UK)

12-30-2006 05:19:09




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 Re: TO20 Ferguson in reply to Ed Miller, 12-29-2006 14:53:00  
Before we had the net I suppose we would have had to use pigeon post or something I reckon..lol
If you can't read the tag near the steering wheel, if it is still there you can tell if it is made in US or UK by the position the number is stamped into the tag. If it was made in the US the number would be along the top edge if it was made in UK the number would be along the bottom edge. TO's were only made in US and TE's were made in UK and France.

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Jerry/MT

12-28-2006 18:49:04




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 Re: TO20 Ferguson in reply to Ed Miller, 12-28-2006 17:02:22  
It should look the same. The 2N & 9N have the Ferguson System. Have you removed the top cover that the rock shaft goes through? If so, it's gonna' be hard to figure out your problem. You should just have removed the right side access cover. You may have been able to figure the problem out a lot easier with an operative hydraulic system. Oh well.
Was the control fork connected to the control valve before you took the top off? Some times they come out. The control valve could be stuck or the piston could be binding in the lift cylinder.
John (UK) may have some other advice to give you in this regard.

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Ed Miller

12-29-2006 14:47:25




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 Re: TO20 Ferguson in reply to Jerry/MT, 12-28-2006 18:49:04  
I wish now I"d have asked you guys before I removed the cover, but the way the oil and the case looked (dirty and cloudy), I figured it needed a good cleaning.
The control fork was connected to the valve before I removed it. I will check the valve for free movement. It will be a few days before I can get on it. Thanks for the input. I appreciate it!

Ed



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