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  1. #1
    Elite Member dfkrug's Avatar
    Join Date
    Feb 2004
    Posts
    4,593
    Location
    NorCal
    Tractor
    05 Kioti CK30HST w/ Prairie Dog backhoe

    Default yet another custom backhoe subframe

    Here is another of my full custom backhoe subframes....this time
    for a Kioti CK30. This one was my hardest and most ambitious so far.
    I have now done full custom subframes for an L2500, two JD 955s (2
    diff kinds of subframes), a CK30, and a factory old style subframe from
    Woods for an L2550.

    A goal for this project was first to get the best subframe I could
    do for this tractor. Not all the best criteria were compatible, however.
    e.g. the quickest attachment method may not be the tightest. Anyway,
    after building a few different kinds of frames and carefully evaluating
    factory frames, I decided on this implementation. I have modeled my
    subframe after the tightly-coupled frames you may see on a small
    commercial-duty machine like the L39 or even a larger CASE 580. Mainly
    this means a "4-pt" attachment with some sort of alignment aid at
    the lower section of the subframe. The hoe is tilted into the lower
    part and secured with bolts or pins at the top. I went with bolts, since
    they allow less wiggling. Professional machines also mount the hoe as
    close as possible to the back of the tractor. I have done this, too.
    There is no use of the 3-pt bracket to secure the hoe. Finally, I
    wanted the 3-pt arms to not have to be removed when the hoe is
    mounted.

    The CK30 was tough to do, due to all the exposed hydraulics underneath.
    Now they are pretected!

    These pix are the results. There is no detectable wiggle or flex, I
    am happy to report.

    I may try one of Woods' new 4-pt frames for another Kioti this summer.
    Then I will have more to compare it to.
    Attached Images Attached Images

  2. #2
    Bronze Member Mr Grizz's Avatar
    Join Date
    Feb 2007
    Posts
    66
    Location
    Davie,Florida
    Tractor
    John Deere 990 , and a Z 445

    Default Re: yet another custom backhoe subframe

    Very nice job dfkrug
    J D 990 .8B backhoe w/ 18 " bucket , 60 " bucket cx 300. 60" bushog, 72" finish mower, 60" rake. AM /FM CD radio, WR Long Electric Hydraulic Valve to control it
    Millonzi LD-48 Grapple 42" Millonzi pallet

    Hers J D Z 445 .



    My Pictures


    http://s193.photobucket.com/albums/z68/MrGreen990/


    http://pictures.aol.com/galleries/redgrizzly660/

    http://s23.photobucket.com/albums/b352/MrGrizz/

  3. #3
    Gold Member
    Join Date
    Jun 2006
    Posts
    330
    Location
    NW WA State
    Tractor
    1980 AC 5020

    Default Re: yet another custom backhoe subframe

    Nice. Can't wait to start mine.

    Monte

  4. #4
    Silver Member
    Join Date
    May 2006
    Posts
    236
    Location
    Purcellville, Va
    Tractor
    B7200D, B8200D

    Default Re: yet another custom backhoe subframe

    Looks great, very factory. The rops police are coming for you, though.

  5. #5
    Elite Member dfkrug's Avatar
    Join Date
    Feb 2004
    Posts
    4,593
    Location
    NorCal
    Tractor
    05 Kioti CK30HST w/ Prairie Dog backhoe

    Default Re: yet another custom backhoe subframe

    Quote Originally Posted by montejw
    Nice. Can't wait to start mine.

    Monte
    Thx for the support, guys.

    Monte, I thought you would be mounted by now. Let me know if you
    need a thumb for your 'Dog.

    As for the ROPS, I was wondering when I would hear something. The
    stock height is reduced 8-9" so I can clear my 8-ft roll-up door. The
    ROPS is still a foot+ higher than my noggin. Sometimes I don't even
    wear my seatbelts, but don't tell anyone....

  6. #6
    Gold Member
    Join Date
    Jun 2006
    Posts
    330
    Location
    NW WA State
    Tractor
    1980 AC 5020

    Default Re: yet another custom backhoe subframe

    Quote Originally Posted by dfkrug
    Thx for the support, guys.

    Monte, I thought you would be mounted by now. Let me know if you
    need a thumb for your 'Dog.

    As for the ROPS, I was wondering when I would hear something. The
    stock height is reduced 8-9" so I can clear my 8-ft roll-up door. The
    ROPS is still a foot+ higher than my noggin. Sometimes I don't even
    wear my seatbelts, but don't tell anyone....
    Done? Haven't even cut a piece of metal yet. I'm going from scratch, have a set of drawings that I'm going to have to make changes to most likely.

    The thumb caught my eye. I'll have to look at it more, but I think I see how it works. Got any pictures of the bucket extended?

    Monte

  7. #7
    Veteran Member joes_427_vette's Avatar
    Join Date
    Aug 2004
    Posts
    1,243
    Location
    Midwest
    Tractor
    New Holland TC 55 DA, 4110 John Deere, HT 20 Bolens, 1456 Bolens

    Default Re: yet another custom backhoe subframe

    Nice work, looks like it will do the job. I have gone through 3 drawings and still not final on my sub frame. I'm mating a bradco to a NH tractor. They want 2k for the mount with shipping. I think it can be done for the price of the steel. I was thinking of the over axle braces also but would there be alot of flex in the length of steel involved. I guess it could also be tied into the upper axle mount plus the three point upper control. I want to make sure it is strong enough.

  8. #8
    Platinum Member
    Join Date
    Apr 2005
    Posts
    549
    Location
    North Central Florida

    Default Re: yet another custom backhoe subframe

    Outstanding job!!! Very nice presentation also.

  9. #9
    Elite Member dfkrug's Avatar
    Join Date
    Feb 2004
    Posts
    4,593
    Location
    NorCal
    Tractor
    05 Kioti CK30HST w/ Prairie Dog backhoe

    Default Re: yet another custom backhoe subframe

    Quote Originally Posted by joes_427_vette
    I was thinking of the over axle braces also but would there be alot of flex in the length of steel involved. I guess it could also be tied into the upper axle mount plus the three point upper control. I want to make sure it is strong enough.
    Flex is definitely bad. My over-the-axle braces are very hefty and
    have almost no curve to them. Where there is a slight curve to get
    around the axle housing, it is welded up double-thick to 1.25". I was
    more concerned with where it attached to the channel frame. From
    the operator's seat, I could see no apparent flex. I also used 12 total
    bolt holes in the rear casting to support the lower section of the
    subframe. My subframe prob weighs about 200# total. Looking at
    what Woods did for this tractor, I see they avoided the whole issue
    of wrapping around the axle by attaching to the bottom and top of the
    rear casting. Easier to make, but I think mine will put less bending
    moment on the middle of the tractor.

    I am running my hoe at 2500psi and this tractor of about 5000-5500
    lb is quite easily lifted and dragged by the digging action.

  10. #10
    Silver Member
    Join Date
    Oct 2005
    Posts
    176
    Location
    Southern, NH
    Tractor
    M5400

    Default Re: yet another custom backhoe subframe

    Dfkrug,
    Nice job.

    Has anyone contemplated mounting a "quick hitch" cat 2 bracket to a custom sub-frame (attached at the rear axle, and the loader mounting plates.)
    With the quick hitch, I think it may be possible to then use a 3 pt. hitch frame on the back hoe. The frame whould carry the top link loads to the sides into the subframe.

    Picture a 4 point subframe that has the quick hitch mounted in place of the lower connecting points and a single link/bolt at the top in the center. The frame then carrys the bending loads to the outside where it can be directed to the subframe.

    Still trying to design the frame for the bh-9000 and the L2900.
    Design
    God is in the business of caring for people:
    EZE 36:26


    M5400
    7' RB, 7' rake, Bradco 609 waiting for seat time...
    New Hampshire

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