Forum › Forums › Bulldozer & Excavator Troubleshooting › backhoe thumb
- This topic has 17 replies, 3 voices, and was last updated 10 years, 4 months ago by Bob Rooks.
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June 4, 2014 at 8:16 pm #30901
does anyone here have any experience making a thumb for a backhoe I would like a hydro.one but will be happy with a manual one. It will be for my jcb 214 hoe
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June 4, 2014 at 10:47 pm #37019
Do you have a power beyond port in your valve stack?
There are many aftermarket kits on the web including eBay and Amazon.
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June 5, 2014 at 7:43 am #37021
It had been set up for a demo hammer so it has some of what I need,on the gauge panel there is a electric switch to enable a foot pedal that works a electric valve.There is a large hose with a quick connector on the top side of the boom.I am still in the thinking end of this.
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June 5, 2014 at 12:16 pm #37025
Demo hammers are usually pin mounted. To my knowledge there are no pin mounted thumb kits. There are kits that have large U-bolts that clamp to the stick but I don't know anything about them. You will also need a return line to your valve so you can operate a double acting cylinder, with a pressure relief valve on it.
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June 7, 2014 at 8:29 pm #37040
This is the type valve you want if want to add a hydraulic thumb and you don't have a power beyond port. I used this type valve in my excavator dozer blade circuit. For instance, you could, say, install this valve in your right side stabilizer circuit. Then when you wanted to use the thumb just flip the toggle switch and use the right side stabilizer control valve to operate the thumb. Be sure to install a pressure relief valve in the return line set to about 1,750 psig to avoid damage to the thumb, and possibly shearing pins.
http://www.princessauto.com/pa…../8051799.p
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June 8, 2014 at 9:26 pm #37041
I predict you will be using a manual thumb soon.
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June 9, 2014 at 11:01 am #37042
you are right .there is some on a auction I am looking at, Excalibur is the manf. 36 incher they have two so hopefully I can get one.
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June 9, 2014 at 11:20 am #37044
Great. Lets see some pics when you get it installed.
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June 13, 2014 at 6:50 pm #37046
well I got lucky I won the bid on that thumb I was looking at,no one else bid on it so it went for the starting bid,200 bucks now I have to run to Knoxville,tn. and get it .I will keep you all up to date.
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June 13, 2014 at 8:08 pm #37047
$200 for a thumb? That's almost too good to be true.
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June 15, 2014 at 6:24 am #37049
yea there was two of them ,but being a online auction I did not place a bid on the other one,cause I could not watch it live could have made a few bucks, but oh well shouldda coulda woulda crystal ball not working.
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June 17, 2014 at 6:35 pm #37050
well I picked up the thumb looks like the construction of it was pretty good .When I placed the thumb on the stick I saw it was not made for this stick(the sale said it was generic) but all I need is a piece of steel 3/4 thick tapered from 4- 3/4 inches to 6 – 1/2 inches by 42 inches long to flatten out the bottom of the stick and add one grease fitting on the thumb,the deal was too good to be to easy.oh well open another beer!
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June 17, 2014 at 11:43 pm #37051
I don't understand what you mean by 'stick'. Can you post any pictures?
ronjin
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June 18, 2014 at 12:10 am #37052
“Stick” is slang for “dipper stick” or “jib”. It's the part that the bucket articulation is mounted to.
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June 18, 2014 at 1:50 pm #37053
David wrote:
“all I need is a piece of steel 3/4 thick tapered from 4- 3/4 inches to 6 – 1/2 inches by 42 inches long”
There's $75.00 right there.
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June 18, 2014 at 7:28 pm #37054
yea actually 100.00 priced it today but I am still coming out cheap on this whole deal
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July 27, 2014 at 8:02 pm #37112
well got it all put together and man that is nice not having to try to curl logs against the boom to pick them up.took pictures of each step to post them ,but my camera that works with my old xp computer will not load the disc on this 8.1 computer,so until I figure it out you will have to take my word on it.sorry
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July 28, 2014 at 4:00 pm #37115
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