4720 homemade 3rd function kit...issue - Page 2
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Thread: 4720 homemade 3rd function kit...issue

  1. Top | #11
    Chris2002's Avatar
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    Ya, maybe Im being to picky about it.I swap out valve with new one and see then.
    Kennyd likes this.

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  3. Top | #12
    Chris2002's Avatar
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    Do you know on these units if there is a gauge tap anywhere?

  4. Top | #13
    Captain Hook Kennyd's Avatar
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    Quote Originally Posted by Chris2002 View Post
    Do you know on these units if there is a gauge tap anywhere?
    To my knowledge no, you'd have to add a Tee somewhere.
    Kenny

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  6. Top | #14
    Chris2002's Avatar
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    Okie dokie, thanks

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    Chris2002's Avatar
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    Alrighty, new valve solved the issue of grapple drifting closed. I "T" ed in a pressure gauge and when grapple in operating it rises to 22-2300 psi. Solenoid valve relief was sopose to be set at 2610psi? New gauge so dunno if its the gauge or relief. Im guessing relief. Next test was I tested the pressure at my grapple connectors on the front. Hooked them both together with a T and at 1500rpms its about 150psi. My conclusion was that hose size is adequate and that grapple is the cause of the increased pressure. Cylinders are are pretty small! Any hydraulic gurus know anyway to solve this while maintaining high grip strenth on the grapple. Thanks!

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    Couldn't you just use an open center mechanical spool valve coming off the PB?
    John Deere 4310 tractor, New Holland 575E backhoe, John Deere F725 mower

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    Chris2002's Avatar
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    I could but I would lose the convenience of one hand operation. I use it brush removal so would be tid bit of a pain.

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