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  1. #1
    New Member
    Join Date
    Oct 2008
    Posts
    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
    Posts
    12,176
    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 and Rigging Accessories, Specialty Hydraulic Components, and MUCH more!

    Simple JDParts Tutorial HERE

    Visit our YouTube Channel

  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
    12,176
    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 and Rigging Accessories, Specialty Hydraulic Components, and MUCH more!

    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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