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    tletourneau's Avatar
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    Question Component question

    Hello everyone, I'm looking for some advice on what I will need to connect a hydraulic top link to the rear SCV kit on my 1025R. It is the JD BLV10351 rear SCV kit and I have ordered the Agri Supply top link (Hydraulic Top Link-Tractor3 point| Agri Supply 90599) with the following specs:

    Top Link Cylinder
    Category 1
    Working PSI: 3,000
    Retracted length: 20 in.
    Extended length: 28 in.
    Bore: 2 in.
    Stroke: 8 in.
    Pin: 3/4 in.
    Port Hole Size - 2 Holes 3/4-16UNF (SAE-8)
    Rod Diameter - 1.25"
    Rod construction: Chrome plated
    For 3-point hitch

    I'm trying to determine what I would need to build hoses that will allow me to use the top link with the rear SCV kit. I have done some searching but am not figuring it out, any advice would be appreciated!
    Thanks,

    Tom

    2017 John Deere 1025R, 54" Deck, 47" Snowblower, Boom Pole, King Kutter 30" Dirt Scoop, King Kutter Carry all, 4' back blade, Fimco 25 gallon 7 nozzle boom sprayer, JD 3rd SCV with hydraulic top link, Mott Flail Mower (borrowed from my brother)

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    Captain Hook Kennyd's Avatar
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    You just need two QDs, two hoses (either 1/4” or 3/8” in size), and a few a adapter fittings.

    The QDs on the 3rd SCV are 1/2” ISO 5675 “AG” style.
    You know the port size on the cylinder.
    The shop that makes the hoses should have the adapter and QD fittings in stock. When you measure for the hoses, make sure you run the 3PH through it’s full range of motion to ensure they will be long enough, a piece of air or garden hose works great for this.
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    Kenny

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    tletourneau's Avatar
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    Quote Originally Posted by Kennyd View Post
    You just need two QDs, two hoses (either 1/4” or 3/8” in size), and a few a adapter fittings.

    The QDs on the 3rd SCV are 1/2” ISO 5675 “AG” style.
    You know the port size on the cylinder.
    The shop that makes the hoses should have the adapter and QD fittings in stock. When you measure for the hoses, make sure you run the 3PH through it’s full range of motion to ensure they will be long enough, a piece of air or garden hose works great for this.
    Thanks Kenny, that cleared it up for me! Two more questions, does 1/2" hose make any sense given the 1/2" AG connector size and does it need a flow restrictor?

    Sent from my SM-T817V using Tapatalk
    Last edited by tletourneau; 10-24-2017 at 09:53 AM.
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    Thanks,

    Tom

    2017 John Deere 1025R, 54" Deck, 47" Snowblower, Boom Pole, King Kutter 30" Dirt Scoop, King Kutter Carry all, 4' back blade, Fimco 25 gallon 7 nozzle boom sprayer, JD 3rd SCV with hydraulic top link, Mott Flail Mower (borrowed from my brother)

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    Captain Hook Kennyd's Avatar
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    1/2” hose would be crazy, takes up to much room and does not bend well, that’s why I did not mention it. 3/8” is even more than needed for a HTL. Can’t answer about the restrictor, but you’ll probably not need one since you don’t have much flow-another reason you don’t need large hoses.
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    Kenny

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    I'll chime in to answer your question. 1/2" hose makes no sense since the flow rate is so low. 1/4" hose is sufficient. Keep in mind, 1/2" pipe only has a port size of about 1/4". Pipe thread is theoretically measured OD, hydraulic hose is measured by ID.
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    I haven't tried my top link without a restrictor but I can tell you that with an .031 orifice, the adjustment is almost too slow with 3/8" hoses. I went with 3/8 on mine to keep heat down. Even though the top link has an orifice fitting and it's slow- I do like that I can fine tune the position and make very slight adjustments while grading that make all the difference in the finished product.

    As for the cylinder.. it's the exact one I have. The ports will likely contact your tractor unless you mount it upside down or backwards. Make sure you get swivel fittings for the cylinder end of the hoses.
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    tletourneau's Avatar
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    Quote Originally Posted by Wvdirtroads View Post
    I haven't tried my top link without a restrictor but I can tell you that with an .031 orifice, the adjustment is almost too slow with 3/8" hoses. I went with 3/8 on mine to keep heat down. Even though the top link has an orifice fitting and it's slow- I do like that I can fine tune the position and make very slight adjustments while grading that make all the difference in the finished product.

    As for the cylinder.. it's the exact one I have. The ports will likely contact your tractor unless you mount it upside down or backwards. Make sure you get swivel fittings for the cylinder end of the hoses.
    Thanks for the information! How long did you make your hoses?

    Sent from my SM-T817V using Tapatalk
    Thanks,

    Tom

    2017 John Deere 1025R, 54" Deck, 47" Snowblower, Boom Pole, King Kutter 30" Dirt Scoop, King Kutter Carry all, 4' back blade, Fimco 25 gallon 7 nozzle boom sprayer, JD 3rd SCV with hydraulic top link, Mott Flail Mower (borrowed from my brother)

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    tletourneau's Avatar
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    Quote Originally Posted by tletourneau View Post
    Thanks for the information! How long did you make your hoses?

    Sent from my SM-T817V using Tapatalk
    Some pictures of the new top link for those that are interested. It seems beefy and well made, especially for the price. The tractor is going in Monday to have the third SCV installed. I told the dealer to go ahead and make the hoses if they can do it for $100.00 or less.

    So according to the hydraulic force calculator at http://www.baumhydraulics.com/calculators/cyl_calc.htm the cylinder should do the following:

    Cylinder Bore: 2"
    Rod Diameter: 1.25"
    PSI: 1990
    Cylinder PUSH: 6252 lbs
    Cylinder PULL: 3810 lbs

    Not bad if accurate.
    Last edited by tletourneau; 10-28-2017 at 10:45 PM. Reason: Added info
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    Thanks,

    Tom

    2017 John Deere 1025R, 54" Deck, 47" Snowblower, Boom Pole, King Kutter 30" Dirt Scoop, King Kutter Carry all, 4' back blade, Fimco 25 gallon 7 nozzle boom sprayer, JD 3rd SCV with hydraulic top link, Mott Flail Mower (borrowed from my brother)

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    The tractor is being returned tomorrow, the dealer couldn't do the hoses at the price point I was hoping for. There is a shop a few towns over that said they could so I will have them do it after I get the tractor back to measure for the hoses. I just need to decide if I want a 90 on each end. Any suggestions?

    On another note, I had asked about the need for an orifice to restrict the flow and the dealer recommended against it. They said the third SCV on the 1025R is a variable rate valve (or some such) and the restriction isn't needed.
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    Thanks,

    Tom

    2017 John Deere 1025R, 54" Deck, 47" Snowblower, Boom Pole, King Kutter 30" Dirt Scoop, King Kutter Carry all, 4' back blade, Fimco 25 gallon 7 nozzle boom sprayer, JD 3rd SCV with hydraulic top link, Mott Flail Mower (borrowed from my brother)

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