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    kitfox's Avatar
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    260 Backhoe Thumb

    So I just ordered and installed the BXpanded thumb. Disappointingly easy to install... took the better part of 5 minutes. I was looking forward to wrenching on the tractor a bit

    In the interest of a finding a winter project, has anyone replaced the mechanical extender bar with a hydraulic cylinder?


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    I am debating getting one for my BH, it would be nice to have a hydraulic thumb though.
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    HomesteadJoe's Avatar
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    If you read in some of the other threads on backhoe thumbs, I have recently written about converting the thumb on my 270B but I have not yet begun to even look into what is would take, or even if it is doable.... I suppose it could be run with a diverter mounted on the backhoe boom or dipper stick, just not somewhere vulnerable..... Sizing the piston and figuring out the plumbing/routing would be another chore but not insurmountable, and finally fabrication and welding of the attaching parts for the cylinder to the dipper arm and thumb... This is the most thought I have put into it so far....lol... I really do like the idea and look forward to hearing from others on this subject.....

    Model 46 backhoe thumb question

    Sincerely
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    Here is a conversion

    Quote Originally Posted by kitfox View Post
    So I just ordered and installed the BXpanded thumb. Disappointingly easy to install... took the better part of 5 minutes. I was looking forward to wrenching on the tractor a bit
    In the interest of a finding a winter project, has anyone replaced the mechanical extender bar with a hydraulic cylinder?


    Sent from my iPhone using Tapatalk Barracuda Thumb conversation
    Last edited by Superglidesport; 01-24-2019 at 10:27 AM. Reason: formatting
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    [QUOTE=Mta1206;3175192]
    Quote Originally Posted by kitfox View Post
    So I just ordered and installed the BXpanded thumb. Disappointingly easy to install... took the better part of 5 minutes. I was looking forward to wrenching on the tractor a bit

    In the interest of a finding a winter project, has anyone replaced the mechanical extender bar with a hydraulic cylinder?


    Sent from my iPhone using Tapatalk[/QUOTEBarracuda Thumb conversation
    I want to do the same thing with the thumb on my 270B. I have seen this video before. I don't really care for the hose routing and cutting the holes in the dipper arm... but I do like the end result and would modify mine in a heartbeat if the right mod came along.... The key is sizing the piston with the correct stroke to mimic the current thumb range of motion.... I have not even begun to look into this.... Maybe in the spring....Backhoe is stored in the barn for the winter....

    Sincerely
    Attached Thumbnails Attached Thumbnails 2F8728C9-E2A9-4746-A702-F7584D774EE8_1548161897455.jpeg  
    Last edited by HomesteadJoe; 01-22-2019 at 07:58 AM.
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    Hydraulic thumb

    [QUOTE=HomesteadJoe;3175266]
    Quote Originally Posted by Mta1206 View Post

    I want to do the same thing with the thumb on my 270B. I have seen this video before. I don't really care for the hose routing and cutting the holes in the dipper arm... but I do like the end result and would modify mine in a heartbeat if the right mod came along.... The key is sizing the piston with the correct stroke to mimic the current thumb range of motion.... I have not even begun to look into this.... Maybe in the spring....Backhoe is stored in the barn for the winter....

    Sincerely
    I just got my 2032 back with the 270B on it and was curious about the hydraulic thumb. I suppose you have already done this but I googled "Hydraulic Thumb" and got a few hits, but all were for excavators. Titan makes one and EA does as well, They seem to be weld on attach which I wouldn't do. It's too pretty LOL.
    How would one power it. Maybe a separate valve fed by the Power Beyond system or the dual SCV. Is that right (SCV)?
    Growing old is hell but it beats the alternative!

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    [QUOTE=DaddysDream;3176064]
    Quote Originally Posted by HomesteadJoe View Post
    Quote Originally Posted by Mta1206 View Post

    I want to do the same thing with the thumb on my 270B. I have seen this video before. I don't really care for the hose routing and cutting the holes in the dipper arm... but I do like the end result and would modify mine in a heartbeat if the right mod came along.... The key is sizing the piston with the correct stroke to mimic the current thumb range of motion.... I have not even begun to look into this.... Maybe in the spring....Backhoe is stored in the barn for the winter....

    Sincerely
    I just got my 2032 back with the 270B on it and was curious about the hydraulic thumb. I suppose you have already done this but I googled "Hydraulic Thumb" and got a few hits, but all were for excavators. Titan makes one and EA does as well, They seem to be weld on attach which I wouldn't do. It's too pretty LOL.
    How would one power it. Maybe a separate valve fed by the Power Beyond system or the dual SCV. Is that right (SCV)?
    There are lots of ways a thumb could be powered. Here are some examples each with pros and cons.
    Options
    1. Rear SCV - if you have the dual rear SCV option you could run two lines along the backhoe boom and dipper arm to the thumb cylinder.
    Pros
    Easy to plumb hydraulically if you already have rear SCV. Requires only two lengths of hose with proper fittings/couplers.
    No additional diverter/3rd Function/control valve needed if you have rear SCVs.
    Cons
    Requires Dual Rear SCV option
    Hydraulic lines vulnerable to damage unless well integrated
    Almost impossible to operate rear SCV controls from backhoe operators seat. Can’t reach and not practical.

    2. Power Beyond with diverter or 3rd function kit. You can run two lines along the backhoe boom and dipper arm to the thumb cylinder.
    Pros
    Does not require dual rear SCV
    Diverter or 3rd function switch can be conveniently mounted on backhoe control lever.
    Cons
    Requires addition of diverter or 3rd function kit
    Requires more complicated plumbing and separate wiring to the backhoe for the diverter or 3rd function kit
    Hydraulic lines vulnerable to damage unless well integrated.

    3. Tap into existing backhoe hydraulics and add a dedicated single spool control valve to operate the thumb. You could run two lines from the control valve along the backhoe boom and dipper arm to the thumb cylinder.
    Pros
    Simplest solution once you determine where to tap into hydraulics.
    No electrical required
    Least costly solution
    Cons
    Hydraulic lines vulnerable to damage unless well integrated.

    I’m sure there are more pros and cons that other fart smellers on this forum can add to what I’ve listed above. I personally would go with option 3. It is the most pragmatic and cost-effective solution.

    Sincerely
    Last edited by HomesteadJoe; 01-23-2019 at 12:47 PM.
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    I've converted mine. I've been meaning to post the details. Maybe your question will motivate me. Cost about $430, using parts readily available - 95% of the parts came from surpluscenter.com. The thumb is absolutely awesome for ripping out blackberry and loading it directly into the trailer without having to touch the evil vine, or get off the tractor to adjust the thumb when changing reach. The electric diverter valve diverts stick control to thumb control when a button is pressed. I chose this control configuration to allow for "pinching" with the thumb and bucket at the same time. I'll try to get all the details and parts list in a fresh thread soon. Here's a teaser:

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    Last edited by Mangus; 01-23-2019 at 04:53 PM. Reason: adding pics, removing metadata
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    Quote Originally Posted by Mangus View Post
    I've converted mine. I've been meaning to post the details. Maybe your question will motivate me. Cost about $430, using parts readily available - 95% of the parts came from surpluscenter.com. The thumb is absolutely awesome for ripping out blackberry and loading it directly into the trailer without having to touch the evil vine, or get off the tractor to adjust the thumb when changing reach. The electric diverter valve diverts stick control to thumb control when a button is pressed. I chose this control configuration to allow for "pinching" with the thumb and bucket at the same time. I'll try to get all the details and parts list in a fresh thread soon. Here's a teaser:

    Attachment 668512
    Attachment 668514
    Attachment 668516Attachment 668518
    Awesome!!! Would love to see more details.

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    Quote Originally Posted by Mangus View Post
    I've converted mine. I've been meaning to post the details. Maybe your question will motivate me. Cost about $430, using parts readily available - 95% of the parts came from surpluscenter.com. The thumb is absolutely awesome for ripping out blackberry and loading it directly into the trailer without having to touch the evil vine, or get off the tractor to adjust the thumb when changing reach. The electric diverter valve diverts stick control to thumb control when a button is pressed. I chose this control configuration to allow for "pinching" with the thumb and bucket at the same time. I'll try to get all the details and parts list in a fresh thread soon. Here's a teaser:
    Nice job! We definitely need more details......

    Thanks

    Sincerely
    BadAss 2038R, R3s, R4s, Spacers, Eng & Tranny Heaters, LEDs, Cages, Fender Flares, Front Fenders, iMatch, Heavy Hitch, Hitch-N-Can, 800# Quick Tach Weights, 220R Loader, Single Point Hyd, 57" HD Bucket, WR Long Tooth Bar & 3rd Function Hyd, 55" Wicked Root Rake Grapple, 270B Backhoe, 72D MMM, Front 3 pt Hitch, 366 FMB Blade, PHD300 Post Hole Digger w\ Auger Set, LR2172 Landscape Rake w/gage Wheels, RB2072 Rear Blade, BB2072 Box Blade, AP12F Pallet Forks, EA 72" Pine Needle Rake, Fit-Rite TNT

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