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Tractor Talk Discussion Forum

hydrulic basics

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guess who

06-06-2004 19:57:48




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could some one tell me the difference between open and closed center hydrulic systyms. Also I need some fittings to go into the cylinders on a ford back hoe built around 1963. The original fittings had a o ring at the tip of the fitting that went into the cylinder. They have male threads on the part that screwes into the cylinder and that part swivels on the tube that goes into the cylinder which has the o ring on it.

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Don Turner

06-25-2005 18:25:44




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 Re: hydrulic basics in reply to guess who, 06-06-2004 19:57:48  
I have ford 1000 tractor. That has been broken down for at least ten years. Now that I have it running. Which it over heats quickly. Which I can deal with later. The hydraulic pump doesn't work. What can do to get primed or working again. I don't want to mess it up by guessing. HELP!!



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txblu

06-07-2004 06:38:01




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 Re: hydrulic basics in reply to guess who, 06-06-2004 19:57:48  
My Fords use open, JD uses closed. The I&T manual tells you what kind your tractor has. Noah told you the difference.
Mark



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Noah w

06-07-2004 05:06:03




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 Re: hydrulic basics in reply to guess who, 06-06-2004 19:57:48  
Hope this works.



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Road Warrior

06-06-2004 20:22:13




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 Re: hydrulic basics in reply to guess who, 06-06-2004 19:57:48  
An open center system allows hydraulic oil to flow through a control valve until you pull the lever to operate a function, such as a cylinder or hyd. motor.

Closed center systems do not allow the oil to circulate through the valve, it is bypassed through the pump or another part of the system. I'd suggest finding a book on hydraulic systems with alot of diagrams so you can "self school" yourself.

The fittings you need are readily available at any hydraulic shop or farm store.

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Ross

06-07-2004 09:29:17




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 Re: Re: hydrulic basics in reply to Road Warrior, 06-06-2004 20:22:13  
While this thread is current...I have a hydraulic system on an old Ford Loader that has a few leaks. I am not sure on the proper way to weld a hydraulic system leak. How flammable is the fluid? Do I need to drain the system and fill the tank with co2 or argon? If I mig weld the chicken scratching that has been done on this poor old system is there any special cooling that I need? CO2 backgas maybe, I am in the dark here, I don't want to be in the dark permanently, you know what I mean?

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Road Warrior

06-07-2004 14:57:51




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 Re: Re: Re: hydrulic basics in reply to Ross , 06-07-2004 09:29:17  
I have welded oil reservoirs and steel lines before while they still had oil in them. The only thing I did was clean the area to be welded. As long as you don't have a huge place to weld, the oil won't get hot enough to do anything. Most oils aren't very flammable, but I won't tell you an explosion is impossible. If you're welding a hairline crack in a tank, you'll most likely be ok.

This is one of those cases where common sense and good judgement come into play. If you have any doubts, hire it done, drain the system, or whatever you think you need to do.

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Ross

06-07-2004 15:11:18




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 Re: Re: Re: Re: hydrulic basics in reply to Road Warrior, 06-07-2004 14:57:51  
Thanks....welding and common sense..two things that should go hand in hand but too often don't.
I think I'll have it done....



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Ray,IN

06-06-2004 20:21:43




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 Re: hydrulic basics in reply to guess who, 06-06-2004 19:57:48  
I lost the address to a military manual detailing hydraulics, from the basics to advanced uses. I seem to remember finding it on YT about 2 years ago, sorry I'm not any help though.



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Joe (Wa)

06-06-2004 22:25:51




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 Re: Re: hydrulic basics in reply to Ray,IN, 06-06-2004 20:21:43  
This is probably it Ray. Real good site anyway.



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