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Harry Ferguson Tractors Discussion Forum
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post hole digger on TO-30

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brian_tx

10-23-2006 14:27:41




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OK, fixed the hydraulic system on my T0-30. (John, thanks for the input, got me rolling faster than if I had to order a part.) Now, when I hook up my post hole digger, it will not lower because it is hooked up to the draft control link/spring up top. The weight pulling on the spring causes the digger to stay in a raised position. I've heard there is a way to isolate this spring, as it is not needed with a digger. Is there a bracket or kit available to be able to utilize implements of this type? Thanks!

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John (UK)

10-24-2006 08:44:20




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 Re: post hole digger on TO-30 in reply to brian_tx, 10-23-2006 14:27:41  
It isn't the weight of the digger pulling on the Control Spring causing the problem or it would do that with every implement you attach. Is there a lot of play in the spring when the digger is lifted as that could cause it, you should just be able to turn it and is the Quadrant lever set correctly so that at 2-1/2 from the top of the quadrant the implement neither lifts nor lowers, set the Spring first, then the Quadrant no use altering the Quadrant if you cant get the Spring right. If you have to adjust the Spring don't force it or you may twist something inside so the top may have to come off to do it, but check back first. When the implement is raised like yours it isn't doing anything to the Top Link it is pulling on the Plunger which is up against the case supporting the weight, you can't isolate the spring, another old wives tale. Check the two setscrews in each end of the cross-shaft under the seat that they aren't too tight and binding and holding the implement up, they should be slack enough to allow the cross-shaft to move and locked up with the lock-tabs to stop them turning.
When you lift the digger does it compress the Control Spring at all, if it does this is what is causing your problem, only a few implement cause this to happen but it is worth checking just in case.

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brian_tx

10-25-2006 12:39:21




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 Re: post hole digger on TO-30 in reply to John (UK), 10-24-2006 08:44:20  
John, it appears that the top arm of thePHD is compressing the control spring when it is raised. It makes sense that this would cause the condition described, but what do I do about it? I've moved the pivot point on the digger as far forward and as far back as it will go, and also even reversed the lower links of the PHD. Nothing has helped. I think the digger is an older Continental-Belton.



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John (UK)

10-26-2006 06:52:33




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 Re: post hole digger on TO-30 in reply to brian_tx, 10-25-2006 12:39:21  
Since my earlier email I have looked up Continental Belton and they have made a few different PHB over the years so we need to know the type you have. I was also wondering if the dimensions of the linkage on the PHB were actually Cat 1 as it should be for a Ferguson, it should be 26.5" between the lower links and 18.5" centre of the lower link pins to the centre of the top link pin, the important one here is the Top Link Pin, if it is too high you will get the problem you have, maybe there is more than one position for this and it could go lower. Check the dimensions of the three point linkage to see if it is correct....John

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John (UK)

10-26-2006 05:47:00




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 Re: post hole digger on TO-30 in reply to brian_tx, 10-25-2006 12:39:21  
After I wrote to you I thought that it may be compressing the Spring and that would cause your problem, we haven't had that one for a while. I am not familiar with the PHD you mention, do you have any pictures of it that you can send to me? Then I can see if there is anything obvious or anything at all we can do. In the past I know we have had to modify the top link connection and fit it to the long hinged pin under the top link connection. If you do have any pictures please send them to:- fergusontractors(at)tiscali.co.uk

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Jeff-oh

10-24-2006 05:11:06




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 Re: post hole digger on TO-30 in reply to brian_tx, 10-23-2006 14:27:41  
Brian,

The TO-30 does not have a two-way control link, that featured debuted on the TO-35. The control links on the TO-20 and TO-30's only work in compression.

Also, note, there is no down force with the TO-30 linkage. It only drops due to gravity.

This is not your issue. There may be something else going on.

Jeff



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RP2

10-23-2006 20:23:21




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 Re: post hole digger on TO-30 in reply to brian_tx, 10-23-2006 14:27:41  
I don't understand. Pushing on the spring should cause the lift to raise up, not pulling on it. When a plow digs in too hard it causes the upper link to push on the spring which tells the lift to raise the plow up a bit.

Are you sure you've got the valve linkage and the quadrant set up correctly?



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