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  1. #1
    Bronze Member
    Join Date
    Aug 2012
    Posts
    53
    Location
    Rogers, Ar.
    Tractor
    Kubota L3450

    Default Hydraulic leak

    The 'Bota sprung a slow dripping leak in a remote tap block under the seat today. I was brush hogging and noticed it when I stopped for a break.

    This is probably easy for you regulars, but I traced the leak to near the threads of the fitting and tightening the fitting didn't do any good. Almost looks like a crack in the cast block from the blurry picture.
    Can I use PTFE or something to seal the threads? At least that will tell me if it's a crack. I would rather remove the block (just 2 bolts) but I'm afraid I will cause more leaks. Besides, there is a small tube coming from the bottom of the block and I can't tell where it goes.

    Anyone know where I can get a block-off plate to remove the hoses completely? They don't do anything, they are connected together and just hang over the lift arms in the back. Probably used to connect to some attachment the PO had.

    So, PTFE tape or find a stock block off plate?

    Thanks!
    -close-jpg-leak-jpg-remote-jpg-seat-jpg

    By the way, it's not coming from the hose or crimp, definitely from the threads or a crack in the threaded portion or cast part.

  2. #2
    Platinum Member
    Join Date
    Feb 2012
    Posts
    837
    Location
    sioux city, ia
    Tractor
    Oliver 1855, Case 1840, Cub 1550

    Default Re: Hydraulic leak

    Clean the area good, unscrew each hose, clean threads and apply teflon pipe dope, do not use teflon tape. Then restart and check for leaks, stand clear just in case it leaks. Dont over tighten the fittings!

  3. #3
    Bronze Member
    Join Date
    Aug 2012
    Posts
    53
    Location
    Rogers, Ar.
    Tractor
    Kubota L3450

    Default Re: Hydraulic leak

    Oops, I probably way over tightened the fittings trying to stop the leak. I'll have t find some teflon pipe dope tomorrow. Guessing TSC would carry it?

    Thanks for the help!

  4. #4
    Gold Member crazyangel's Avatar
    Join Date
    Feb 2012
    Posts
    329
    Location
    Western New York
    Tractor
    Kubota L5740-HST; Kubota RTV900

    Default

    Quote Originally Posted by Spikes
    Oops, I probably way over tightened the fittings trying to stop the leak. I'll have t find some teflon pipe dope tomorrow. Guessing TSC would carry it?

    Thanks for the help!
    TSC might or any hardware store should have it in their plumbing section

  5. #5
    Veteran Member
    Join Date
    Jul 2009
    Posts
    1,743
    Location
    IL
    Tractor
    B2710

    Default Re: Hydraulic leak

    I'd clean it up good and make sure it's the threads and not the fitting itself. Blow it off good with air then start it up and sit there with a mirror and a good light to see where the fluid comes out first.
    Kubota B2710, New Holland CM274 front mower, Toro Zmaster ZTR, Ford 908 bush hog, New Idea manure spreader, Swisher trail mower

  6. #6
    Bronze Member
    Join Date
    Aug 2012
    Posts
    53
    Location
    Rogers, Ar.
    Tractor
    Kubota L3450

    Default Re: Hydraulic leak

    I took the remote distribution block off today and the entire inside face of both the tractor and block are painted gray - including the O-rings!

    Some of the paint has come loose on the O-rings so I'm going to try cleaning all that up and see what happens.

    Edit:

    Do I need to bleed anything when I put this back together? I'm guessing I'll loose 2 - 3 tablespoons of fluid, plus what drains back from the system being open for a few hours.

  7. #7
    Gold Member crazyangel's Avatar
    Join Date
    Feb 2012
    Posts
    329
    Location
    Western New York
    Tractor
    Kubota L5740-HST; Kubota RTV900

    Default

    I'm pretty sure that as long as its an open center hydraulic system you shouldn't need to bleed it

  8. #8
    Bronze Member
    Join Date
    Aug 2012
    Posts
    53
    Location
    Rogers, Ar.
    Tractor
    Kubota L3450

    Default Re: Hydraulic leak

    Perfect timing on that post, Crazyangel.

    I had just got home from buying an o-ring kit when I saw your post and put everything together with new rings and paint removed. No leaks!

    My first repair done. Feels good.

    Thanks again all!

  9. #9
    Bronze Member
    Join Date
    Aug 2012
    Posts
    53
    Location
    Rogers, Ar.
    Tractor
    Kubota L3450

    Default Re: Hydraulic leak

    Spoke too soon. I'm going to try and find the stock block off cap and get rid of the remote altogether.

  10. #10
    Platinum Member
    Join Date
    Feb 2012
    Posts
    837
    Location
    sioux city, ia
    Tractor
    Oliver 1855, Case 1840, Cub 1550

    Default Re: Hydraulic leak

    Did you try to reseal hose fittings to block.

    Dave

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