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  1. #1
    New Member
    Join Date
    Oct 2008
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    11
    Location
    Maine
    Tractor
    John Deere 870

    Default John Deere 390 plow blade

    Hi i built a quick attach for my 870 Jd to fit the 390 Jd blade on the loader it worked out great used a cushion vlv also to protect the hose and rams .The blade was new that i had purchased it at a auction . i found it had a bad plow cylinder and replaced it with a new one from Jd 390.00 does any one know of a ram to replace the JD one. it is the quick switch ram. thanks sleepy.

  2. #2
    Advertiser kennyd's Avatar
    Join Date
    Jul 2003
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    11,870
    Location
    Westminster, MD
    Tractor
    John Deere 4110, 455

    Default Re: John Deere 390 plow blade

    What was "bad" with the cylinder? You can purchase new seal kits for about $20 or so (I just rebuilt mine a few months ago)
    KennyD
    www.boltonhooks.com



    Bolt On Grab Hooks, Weld On Grab Hooks, Specialty Chain Accessories, Specialty Hydraulic Components.

    Simple JDParts Tutorial HERE

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  3. #3
    New Member
    Join Date
    Oct 2008
    Posts
    11
    Location
    Maine
    Tractor
    John Deere 870

    Default Re: John Deere 390 plow blade

    Hi hyd oil was spraying out the vent hole when activated to extend does that have a ball check where the vent is? any info would be great thanks Sleepy.

  4. #4
    Advertiser kennyd's Avatar
    Join Date
    Jul 2003
    Posts
    11,870
    Location
    Westminster, MD
    Tractor
    John Deere 4110, 455

    Default Re: John Deere 390 plow blade

    Quote Originally Posted by sleepynightowl View Post
    Hi hyd oil was spraying out the vent hole when activated to extend does that have a ball check where the vent is? any info would be great thanks Sleepy.
    NO! There is no check valve, you just need to seals. The only reason to replace a cylinder would be having a bent or excessively scored/pitted piston or bore.

    Look at the picture I attached.
    Attached Thumbnails Attached Thumbnails -390-cylinder-gif  
    KennyD
    www.boltonhooks.com



    Bolt On Grab Hooks, Weld On Grab Hooks, Specialty Chain Accessories, Specialty Hydraulic Components.

    Simple JDParts Tutorial HERE

    Visit our YouTube Channel

  5. #5
    New Member
    Join Date
    Oct 2008
    Posts
    11
    Location
    Maine
    Tractor
    John Deere 870

    Default Re: John Deere 390 plow blade

    HI thanks for the info.Sleepy

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