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  1. #11
    Silver Member
    Join Date
    Aug 2009
    Posts
    152
    Location
    Port Orchard, WA
    Tractor
    Kubota L4310 GST;Case 580 CK (1968)

    Default Re: Backhoe cylinder problem? (w/ video)

    And please post back.
    Cycle_Gator,
    Port Orchard, WA
    Kubota L4310 GST

  2. #12
    Bronze Member
    Join Date
    Apr 2011
    Posts
    78
    Location
    Forest Ranch, CA
    Tractor
    Kubota L3540

    Default Re: Backhoe cylinder problem? (w/ video)

    Update: I performed the "aggressive" air purge maneuver as such:
    -- engine RPM at PTO speed around 500
    -- pushed dipperstick lever forward and held for 1 minute
    -- pulled dipperstick lever back and held for 1 minute
    -- did same for other two cylinders, but only about 40 seconds each
    -- repeated for dipperstick cylinder for about 40 seconds

    I redid my "curl on the stump" test and had the same results.

    I guess the next step for me will be to have my dealer watch the YouTube video and see if he'll take it into the shop. Getting a pressure gauge and doing more research would help, but I don't think that is something I should have to do on a 3 month old tractor. The dealer should step up and do the "leg work".

    I'll let you know how that goes.

    Thanks again for all the help. I would be much less informed without TBN.

    -Jeff
    Kubota L3540 HST-3, LA724 Loader w/ 3rd function valve & quick attach bucket, BH77 Backhoe, 72" Box Blade, 84" Quick Attach FEL Snow Blade, 48" NAI Grapple
    Located 3200 feet elevation in the Sierra Nevada foothills of Northern California

  3. #13
    Elite Member
    Join Date
    Oct 2004
    Posts
    2,922
    Location
    limerick pa lycoming county pa
    Tractor
    kubota bx23

    Default Re: Backhoe cylinder problem? (w/ video)

    One thing I would try is to carefully crack the fitting loose on the bottom of the cylinder when you have the pressure on with the bucket curl and see if any air come's out.

    It does look like there is air in cylinder the way it springs back when it bucket come's off the stump.

    I would hook the bucket on the stump and and pull back on the dipper stick and it should drag the tractor back toward the stump even with the out riggers down.

    3rd if they have one like at the shop try it there.
    If it works tell them you want them to swap the 2 between the machines.
    you get the good one.

    tom
    If it ain't broke we will help you brake it
    If it is broke we will help you get it fixed!


    https://www.facebook.com/joseph.t.mussington

  4. #14
    Gold Member jmanatee2's Avatar
    Join Date
    Feb 2011
    Posts
    298
    Location
    Southwest NH
    Tractor
    Kubota L39 TLB

    Default Re: Backhoe cylinder problem? (w/ video)

    do you have a wall or something you could lower the boom down and cycle the crowd then.... That way air would move towards the return hose
    2006 Kubota L39
    QA SSQA Pallet forks
    Wallenstein BX42s Wood Chipper
    King Kutter 72" Pro HD Box Blade
    King Kutter Box fram Disc 20-20
    HF 3 Pt Quick Hitch
    1979? John Deere 350B Dozer with 6 way blade

  5. #15
    Gold Member Stonehaller's Avatar
    Join Date
    Sep 2009
    Posts
    353
    Location
    Mid-Michigan
    Tractor
    Case DX45, Kubota L39, Kubota RTV500

    Default Re: Backhoe cylinder problem? (w/ video)

    Make sure your quick disconnects between the hoe and tractor are fully seated, especially the return line.
    Case DX45 with FEL, Kubota L39TLB, Kubota RTV500

  6. #16
    Bronze Member
    Join Date
    Apr 2011
    Posts
    78
    Location
    Forest Ranch, CA
    Tractor
    Kubota L3540

    Default Re: Backhoe cylinder problem? (w/ video)

    Another minor update: the dealer picked up the tractor yesterday. Says he will put some gauges on it, measure some pressures, and then consult with kubota on what they think.

    Looking forward to getting this thing fixed once and for all!

    -Jeff
    Kubota L3540 HST-3, LA724 Loader w/ 3rd function valve & quick attach bucket, BH77 Backhoe, 72" Box Blade, 84" Quick Attach FEL Snow Blade, 48" NAI Grapple
    Located 3200 feet elevation in the Sierra Nevada foothills of Northern California

  7. #17
    Bronze Member
    Join Date
    Apr 2011
    Posts
    78
    Location
    Forest Ranch, CA
    Tractor
    Kubota L3540

    Default Re: Backhoe cylinder problem? (w/ video)

    It's fixed now. The dealer picked up the tractor Tuesday afternoon and returned it Thursday evening.

    So what was the problem? Well, last time they had it in the shop they replaced a control valve (or part of it). The guy put something in backwards so the check valve was facing the wrong way. That's all the details I could get out of the guy who delivered it.

    I tried curling the bucket against the same stump and it's much, much better and will even pull the tractor backwards instead of compressing the cylinder.

    So glad to have this finally done.

    -Jeff
    Kubota L3540 HST-3, LA724 Loader w/ 3rd function valve & quick attach bucket, BH77 Backhoe, 72" Box Blade, 84" Quick Attach FEL Snow Blade, 48" NAI Grapple
    Located 3200 feet elevation in the Sierra Nevada foothills of Northern California

  8. #18
    Platinum Member
    Join Date
    Apr 2010
    Posts
    975

    Default Re: Backhoe cylinder problem? (w/ video)

    Well, good that it's fixed. Bad that the dealer shop was the cause of the problem and gave you such a hard time about it.

  9. #19
    Member
    Join Date
    Aug 2011
    Posts
    25
    Location
    Washington state cascade
    Tractor
    case 580D

    Default Re: Backhoe cylinder problem? (w/ video)

    I had a Kabota once and I told myself never again. It was not the machine itself but, the **** dealers attitude. Also they charge for everything transporting, return and repairs the warranty was none exciting. Good luck with dealing with them.

  10. #20
    Bronze Member
    Join Date
    Apr 2011
    Posts
    78
    Location
    Forest Ranch, CA
    Tractor
    Kubota L3540

    Default Re: Backhoe cylinder problem? (w/ video)

    The dealer is trying to make it right... they just sold me the mechanical thumb for their cost.

    -Jeff
    Kubota L3540 HST-3, LA724 Loader w/ 3rd function valve & quick attach bucket, BH77 Backhoe, 72" Box Blade, 84" Quick Attach FEL Snow Blade, 48" NAI Grapple
    Located 3200 feet elevation in the Sierra Nevada foothills of Northern California

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