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Old 05-23-2010, 12:02 PM   post #1 of 5
cnchobbyrich
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Default Backhoe hydraulic set-up?

Thinking of building a backhoe attachment for a Deere 425. What type of pump ,cylinders and valves should I use? Thinking of 2"-2 1/2" cylinders with 1" rods? Boom 14",Dipper 10",Bucket 12",Swing 7" and Stabilizers 8"? Don't have a clue on what spool control valve to use. Going to base my design between the Kwick-Way and Kyoker backhoes. Please give brands and models.
Thanks
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Old 05-23-2010, 12:40 PM   post #2 of 5
simple simon
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Default Re: Backhoe hydraulic set-up?

Hi

Dosen't J.D. 425 have a Hydraulic system of it's own?
One pump is all you need.

Spool valves are a personal preferance. I like the twin joy sticks my self, But all I had was single levers.

S.S.
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Old 05-24-2010, 07:10 AM   post #3 of 5
cnchobbyrich
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Default Re: Backhoe hydraulic set-up?

Quote:
Originally Posted by simple simon View Post
Hi

Dosen't J.D. 425 have a Hydraulic system of it's own?
One pump is all you need.

Spool valves are a personal preferance. I like the twin joy sticks my self, But all I had was single levers.

S.S.
425 has a pump-hydrostatic drive, not sure if it would have enough power or flow
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Old 05-24-2010, 10:01 PM   post #4 of 5
Chagrin
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Default Re: Backhoe hydraulic set-up?

Quote:
Originally Posted by cnchobbyrich View Post
425 has a pump-hydrostatic drive, not sure if it would have enough power or flow
4.65 GPM, so it's pretty close to reasonable.
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Old 05-26-2010, 03:33 PM   post #5 of 5
cnchobbyrich
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Default Re: Backhoe hydraulic set-up?

Where do you connect into the on-board hydraulics?
At the slective control valve?I has to plugs.Would these be controled by the levers for the front and rear exsisting cylinders?
I want independent control of the backhoe,basicly a to pump, to tank type connections that a 4 spool valve can be used.
Also thought I could tee into the line between the rear axle -pump and the power sterring for the supply? Add a 4 way connection in place of the 3 way one (before radiator) for the return?
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