Page 1 of 6 1234 ... LastLast
Results 1 to 10 of 52
  1. #1
    Bronze Member
    Join Date
    Dec 2007
    Posts
    98
    Location
    Cuttingsville, VT
    Tractor
    Ford 850, Ford 1210, Ford 1700, Bobcat 742

    Default Stump puller

    Greetings all, from a new guy on the site. I am a Christmas tree grower, and find that I fabricate as many attachment as I buy. My current need is for a stump puller which attaches to my Bobcat 742B. I have rented a small Kobelco excavator with thumb several times, but it digs too much dirt, and the thumb doesn't have enough travel. There are several manufacturers of root grapples for skid steers, but they are designed for picking up debris which is mostly on top of the ground. I have Googled and researched for two years, and concluded that what I need isn't made commercially, so let's fire up the torches and welder!

    I envision a mechanism which looks like a cross between a root grapple and a log loader grapple. The purpose is to extricate a single Christmas tree stump with minimal soil excavation. This will be fabricated as a universal skid steer mount using heavy channel and angle iron, not a full-face plate--I need to see through it. I am thinking of using box blade shanks (AgriSupply), two on the mounting plate and three arranged to act as a thumb. Max width for the three tines is 12" (6" apart), and travel so that they by-pass a little when closed. The mounting plate has 117 degrees of travel from -8 @ full roll-back to 109 @ full roll-out. I plan to mount the grapple assembly (think ice tongs) so it 'hangs' plumb when the mounting plate is rolled out @ 45 degrees. This will maximize my travel options.

    I picture the operation as follows: approach a stump with the plate rolled out to 45 degrees, and the opposing tines (thumb) fully retracted. Dive in under the stump with the tines on the plate, roll back a little to get under it, then activate the thumb to clamp the stump. With a little forward-and-back with the machine, and some roll-back and roll-out with the mount, the stump is loosed and can be lifted up easily. Only 587 more to go!

    This all sounds too easy, so I need some feedback to identify flaws in my design. Thanks in advance

  2. #2
    Veteran Member wedge40's Avatar
    Join Date
    Oct 2007
    Posts
    2,194

    Default Re: Stump puller

    I think I know what you're trying to do
    Here is link to thread from a few years back that might be of some help.
    But instead of lifting the whole stump out your break the roots below the ground and then remove the stump.

    Check it out.
    http://www.tractorbynet.com/forums/b...t=ripper+tooth
    1967 Ford 4000,Mahindra 4530 with FEL and BH, Box blade, straight blade, FEL, Rake, Bushhog, Backhoe, Jinma chipper, KKII tiller, Grapple. Mahindra 4530, with FEL and Backhoe.

  3. #3
    Elite Member czechsonofagun's Avatar
    Join Date
    Jun 2006
    Posts
    3,240
    Location
    Old Dominion
    Tractor
    Kubota B1750

    Default Re: Stump puller

    Welcome, tree_grower!

    Just thinking out loud - dont you want to apply tension to the stump, and then cut under it to interrupt roots?
    Regards,

    Prokop


    I was put on Earth to accomplish a certain number of things. Now I'm so far behind, I'll never die!

  4. #4
    Bronze Member
    Join Date
    Dec 2007
    Posts
    98
    Location
    Cuttingsville, VT
    Tractor
    Ford 850, Ford 1210, Ford 1700, Bobcat 742

    Default Re: Stump puller

    Keep the feedback coming. I have a root-rot problem which is best addressed by removing the entire root system of the harvested trees. I need to remove as many of the roots as possible (within reason), not cut them off. As far as applying pressure to the stump, you're thinking of leverage which requires some stump height. There's not much stump left after cutting a Christmas tree.

  5. #5
    Platinum Member BarryinMN's Avatar
    Join Date
    Feb 2003
    Posts
    860
    Location
    Minnesota
    Tractor
    JD, Allis-Chalmers, Zetor

    Default Re: Stump puller

    Do you think your Bobcat has enough lifting/breakout force to pull that tap root up? Might need one of those tracked skidsteers.

    Some of those center tap roots give my full size backhoe a workout!
    Veneer Tree Farmer

  6. #6
    Elite Member
    Rest in Peace
    MrJimi's Avatar
    Join Date
    Jan 2006
    Posts
    2,504
    Location
    NorthEast, Florida
    Tractor
    Case 1845 C Skid steer

    Default Re: Stump puller

    How about a skinny , long tooth grapple. Some thing with 3 or four fingers on the bottom and a few less on top, that way you could pull it out like a dentist pulls a tooth and most of the dirt would stay in the hole after you shake it some

    Jim
    Click here for my current weather

    Case 1845C with dirt bucket, forks, 3 point quick hitch on the front, 30'. boom, 6 & 1/2 foot disc harrow, 5 foot Howse RC, root and tree bucket and Grouser tracks and a Ford F-550 pick up,7.3 Turbo with Auto and a Crosley 25' X 8'.6" X 14 K D/O trailer.
    PDF files don't like me !!
    Making a F-550 Pick Up thread
    My Gallery
    My other Gallery
    Revielle video here
    Dear Eliot

  7. #7
    Gold Member
    Join Date
    Apr 2005
    Posts
    402
    Location
    Maine
    Tractor
    1260 Massey

    Default Re: Stump puller

    How about using some leverage. Think of the claw ona hammer. If you could fab somthing that has a simular shape. Drive into the stump and then lift and drive forward while rolling the stump out. I'll try and draw a picture.
    Phil
    tree stump claw.pdf

    I hope this helps Perhaps it should be approximatly 30" long and about 12" wide at the end and as wide as you can make it towards the tractor.
    Last edited by philbuilt; 12-31-2007 at 05:53 PM.
    Still digging pond

  8. #8
    Veteran Member Redbug's Avatar
    Join Date
    Aug 2004
    Posts
    1,920
    Location
    Columbia, SC
    Tractor
    Kubota L3830HST

    Default Re: Stump puller

    Possibly something like this?

    Stump Grapple
    Dave

    "If your sport does not put grease, blood, or dirt under your fingernails, then it's just a game!"

  9. #9
    Bronze Member
    Join Date
    Dec 2007
    Posts
    98
    Location
    Cuttingsville, VT
    Tractor
    Ford 850, Ford 1210, Ford 1700, Bobcat 742

    Default Re: Stump puller

    Thanks guys, keep em coming. I have checked out the X-treme stump grapple and similar units, but they are designed to function when the machine is moving forward, and they are more of a bucket than tongs. My land is all side-hill, and it's hard to push uphill. The machine is so well-balanced that when facing downhill, any weight on the front pulls it over on its nose. I need to approach the stumps from below and have the working forces on the front countered by the machine weight behind. The machine won't pull a stump by the grab-and-tug method, but works fine with the grab-and-wiggle-and-wigglesomemore-then-tug method. Fortunately I am not dealing with taproots. My trees are all balsam and fraser fir with 3-6 lateral roots seldom more than a foot deep.

    One concern I have deals with gripping pressure of the thumb tines. If the opposing tines are hinged at the top, and activated by a cylinder mounted above, just like an excavator thumb, will there be enough pressure? It has been suggested I mount the cylinder below, like the door closer on a storm door. The theory is that there is more pressure brought to bear if the tines are pulled together, rather than pushed together. What think you ???

    PS-Phil, what is the software you use to make the drawing? Auto cad? I would love to find a simple, Windows-based application for making quick line drawings.

  10. #10
    Elite Member
    Rest in Peace
    MrJimi's Avatar
    Join Date
    Jan 2006
    Posts
    2,504
    Location
    NorthEast, Florida
    Tractor
    Case 1845 C Skid steer

    Default Re: Stump puller

    You need something like these
    Jim
    Attached Images Attached Images
    Click here for my current weather

    Case 1845C with dirt bucket, forks, 3 point quick hitch on the front, 30'. boom, 6 & 1/2 foot disc harrow, 5 foot Howse RC, root and tree bucket and Grouser tracks and a Ford F-550 pick up,7.3 Turbo with Auto and a Crosley 25' X 8'.6" X 14 K D/O trailer.
    PDF files don't like me !!
    Making a F-550 Pick Up thread
    My Gallery
    My other Gallery
    Revielle video here
    Dear Eliot

Page 1 of 6 1234 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.