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Ford 9N, 2N & 8N Discussion Forum
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Another HYD question

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Rob

11-18-2003 08:37:49




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I was out looking at tractors this past weekend and found one that runs good and all seems operate properly. The hydraulics are smooth going up with a plow on the back. They stayed up even with the tractor off for 15 minutes and didn't move. When I lowered the plow it was nice and smooth and could stop any place I wanted. The one thing I have a question about is when it hit the ground the hydraulics would start to chatter, like it was trying to push down by couldn't. Is this normal?? I didn’t think they had down pressure?? Is there something is should check??

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Rob

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souNdguy

11-18-2003 11:31:06




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 Re: Another HYD question in reply to Rob, 11-18-2003 08:37:49  
Most tractors don't have 3pt downpresure. The exception wouldbe some large ag tractors, tractors with a down pressure kit or hyd toplink, or older tractors that didn't have a 3pt lift, and were retrofitted with a 3pt lift.. I've seen some of those kits.. for farmall H's.. that had downpressure.

Is it possible you just heard the hyds releiving pressure from the 3pt once the weight of the plow was on the ground? What type of tractor was it?

Soundguy

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Rob

11-19-2003 05:23:26




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 Re: Re: Another HYD question in reply to souNdguy, 11-18-2003 11:31:06  
It was on a Ferguson TO30. It was more then a noise, you could actually feel it. Everything else on the tractor is great execpt for this. I know it's not a N but you guys are the best when it comes to HYD questions

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Rob



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souNdguy

11-19-2003 05:50:31




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 Re: Re: Re: Another HYD question in reply to Rob, 11-19-2003 05:23:26  
Hmm.. a t0-30 is going to be a cousin of the NAA.. but I'm not familiar with the hydro setup.. not sure if it has the hydro pump on the side of the engine or not.. etc.

Anything else you can tell us? Any external hyd ports or other valving / cylinders.

Soundguy



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Rob

11-19-2003 09:09:22




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 Re: Re: Re: Re: Another HYD question in reply to souNdguy, 11-19-2003 05:50:31  
It looks identical to the "N" with out position control. Which is why I thought about asking here. The hole tractor looks about the same except the hood tilts forward and it has a over head valve 4 cylinder instead of the flat 4. If it was a "N" what would be your best guess??

Rob



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souNdguy

11-19-2003 09:39:00




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 Re: Re: Re: Re: Re: Another HYD question in reply to Rob, 11-19-2003 09:09:22  
Well the 9n and 2n hydraulic system was the 'fergusion system'. There was absolutely no provision for downpressure.. the hyds just weren't plumbed that way.. in fact.. the upper lift arms and rocker can be lifted up independent of the hyd cylinder moving...as in there is no solid connection from the piston ram to the upper lift arms.. it is strictly gravity down.. even if someone conbled some weird way to suck the piston in, they would also have to redesign the upper lift arm connection point to make it a solid connection.. the exception to this is if you see an external cylinder on anything.. like top-n-tilt.. etc... otherwise.. not sure what you are hearing from the hyd pump.. perhaps a bad unloading or relief valve? Zane is going to be the man to help you I think...

Soundguy

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Alvin n Ms.

11-19-2003 18:55:27




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 Re: Re: Re: Re: Re: Re: Another HYD question in reply to souNdguy, 11-19-2003 09:39:00  
That piston pump is located in the very bottom, with no filtering system what so ever. The 4 little pistons may have scrathes and gouges from oil contamination. If it has good clean oil just run it, and she will let you know when its time to stop. They take water in at the big spring behind the drivers seat, and at the gear shift. You can flush it out with diesel fuel.



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souNdguy

11-20-2003 05:08:30




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 Re: Re: Re: Re: Re: Re: Re: Another HYD question in reply to Alvin n Ms., 11-19-2003 18:55:27  
Wow.. even the to-30's still used a belly pump?

Soundguy



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