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  1. #1
    Platinum Member Red Horse's Avatar
    Join Date
    Dec 2010
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    701
    Location
    Bolton, MA
    Tractor
    Deere 655ZTrak, Deere 4720 Cab, 400 X

    Default Stutter, 400X Loader

    My 4720/400X (440 hrs), has a frequent "stutter" when raising the loader. Doesn't do it all the time-will also notice it from time to time when raising the 3 pt. That says to me a pump/filter issue? The oil/filters are original- oil looks clear and bright but I do have the oil/filter on hand for a change so I don't think I'll wait till 500 hrs.

    Any thoughts?

  2. #2
    Elite Member
    Join Date
    Jul 2006
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    4,409
    Location
    Northwest, WA

    Default Re: Stutter, 400X Loader

    There use to be a issue with a short piece of rubber hose just before filter collapsing and starving the pump but haven't heard of that in quite a while but wouldn't hurt to check out.
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  3. #3
    Platinum Member
    Join Date
    Dec 2001
    Posts
    901
    Location
    Maryland

    Default Re: Stutter, 400X Loader

    The online manual says trans oil and filter change at 400 hours. I am betting the filter is restricted.

  4. #4
    Platinum Member Red Horse's Avatar
    Join Date
    Dec 2010
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    701
    Location
    Bolton, MA
    Tractor
    Deere 655ZTrak, Deere 4720 Cab, 400 X

    Default Re: Stutter, 400X Loader

    Quote Originally Posted by Willl View Post
    There use to be a issue with a short piece of rubber hose just before filter collapsing and starving the pump but haven't heard of that in quite a while but wouldn't hurt to check out.
    thx guys-I'll check out both points-thought 500 hrs. was hyd oil point.

  5. #5
    Veteran Member sunnyside360's Avatar
    Join Date
    Aug 2006
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    1,308
    Location
    Central PA
    Tractor
    JD 3720 Cab, JD 4320, Kubota M110X Cab, Kubota ZD331-72

    Default Re: Stutter, 400X Loader

    My 400X loader acted similar to your description when the 4320 tractor had about 100 hrs. Got some suggestions here on TBN including checking the power steering fittings for tightness. Found one fitting on the power steering cylinder was snug but not real tight -- apparently leaking air but not fluid. No more issue after tightening that fitting. May want to check all fittings in hydraulic circuits for tightness.

  6. #6
    Platinum Member Red Horse's Avatar
    Join Date
    Dec 2010
    Posts
    701
    Location
    Bolton, MA
    Tractor
    Deere 655ZTrak, Deere 4720 Cab, 400 X

    Default Re: Stutter, 400X Loader

    Quote Originally Posted by sunnyside360 View Post
    My 400X loader acted similar to your description when the 4320 tractor had about 100 hrs. Got some suggestions here on TBN including checking the power steering fittings for tightness. Found one fitting on the power steering cylinder was snug but not real tight -- apparently leaking air but not fluid. No more issue after tightening that fitting. May want to check all fittings in hydraulic circuits for tightness.
    SS-Thx- I will check that out!

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