Adding a Hydraulic Cylinder to My Backhoe Thumb

Adding a Hydraulic Cylinder to My Backhoe Thumb - Part 2 (

Рет қаралды 2,309

Күн бұрын

My BXpanded Backhoe thumb has been just great for moving big rocks, grabbing piles of branches, or even big logs. The problem is I have to get off the tractor to set the position of the thumb and I've gotten tired of doing that so I’m going to convert it to hydraulic operation. This is Part 2 of this project. I encourage you to watch Part 1 first if you haven't already: • Adding a Hydraulic Cyl...
Parts Used So Far:
* Universal Hydraulic Third Function Valve Kit w/ Joystick Handle, 15 GPM:
- Amazon: amzn.to/3Qoji1m
- Summit Hydraulics: summit-hydraulics.com/product...
* Magister Hydraulics Double Acting Hydraulic Cylinder - Tang Universal Hydraulic Cylinder 2" Bore, 10 inch Stroke Tang Style (2x10): amzn.to/3SkDCmE
* Woodstock W1171 - Spacer - 1" ID x 1-1/2" OD x 1/2" H: www.grizzly.com/products/wood...
* Hillman 3/4 in. ID x 1 in. OD x 2 in. L Seamless Steel Deep Drawer Spacers: www.tractorsupply.com/tsc/pro...
* Nylon Protective Hose Sleeve Sheath Cable Cover Welding Tig Torch Hydraulic Hose, 1 Inch ID, 25 Feet Length, Black: amzn.to/46TRwRi
Visit my Amazon Affiliate Store: www.amazon.com/shop/diymyway
Note: Links to Amazon products are Amazon Affiliate links that won’t cost you any extra, but will help support my efforts with a small commission on qualified products. Thanks for your support!
Visit DIYMyWay.net: diymyway.net/
00:00 Introduction
01:03 Hydraulic Control Design
04:14 Determining Hose Lengths
05:49 Installing the Boom Hoses
08:46 Assembling the 3rd Function Valve
11:39 Location the 3rd Function Valve
13:41 Attaching Fitting to the Connection Block
16:01 Attaching the 3rd function Valve to the Backhoe
20:16 Attaching the Bulkhead Fits
#diy #outdoors #tractors #rurallife #kubota

Пікірлер: 37

@samengler539 7 ай бұрын

Great job Martin . You will enjoy using it after all your hard work doing it.

@DIYMyWay 7 ай бұрын

Thanks Sam!

@LouisianaTractorworks 7 ай бұрын

Martin, you are doing a awesome job with the install and the videos on it. Looking for Pt. 3 Have a great weekend! See ya!

@DIYMyWay 7 ай бұрын

Thanks, John! Hope you have a great weekend too!

@martyb3783 7 ай бұрын

Looking good. This is more complicated than I first imagined it. Well done!

@DIYMyWay 7 ай бұрын

Hey Marty! Yes, it’s the most complicated tractor mod I’ve tackled but it’s been fun and most importantly it works! Thanks for stopping by!

@phattdaddy63 7 ай бұрын

Hi Martin, I will say it is evident that you have put much thought in to your installation. One of my coworkers and me have a saying that is SO true. "FAIL TO PLAN....PLAN ON FAILING" Do you have engineering background? Your methodical and analytical process along with step by step explanations, makes me believe you may have a mechanical engineering background. Thanks for sharing...waiting on video#3.

@DIYMyWay 7 ай бұрын

Thank you! Yes I do. I am an electrical engineer but spent most of my career in telecommunications and IT. Thanks for watching!

@tractortalkwithgary1271 7 ай бұрын

Very professional install Martin!!! Well done!👍🏻

@DIYMyWay 7 ай бұрын

Thanks, Gary!

@gckshea 7 ай бұрын

Thank you, Martin, for these two parts. An aside: my wife was overhearing this video, hearing your voice for the first time. She exclaimed, "This guy's voice!...it's amazing. He sounds like a narrator for PBS specials...like Rick Steeves. Very soothing." There ya go! A purpose and result you didn't foresee!

@DIYMyWay 7 ай бұрын

You’re welcome! Part 3 should be out by next weekend if all goes well. Thanks for sharing your wife’s comment! I really appreciate it!

@tractorman4461 7 ай бұрын

Awesome project Martin...I am totally impressed with everything you've done so far !! ORB's are a great invention aren't they. People sometimes mistake the threads for tapered pipe threads and tighten them down way too tightly. Btw, looks like you're feeling pretty comfortable with the MIG. Waiting for part 3 my friend.

@DIYMyWay 7 ай бұрын

Thank you Wendell! It’s been a fun one and I’m almost done. I do know it works cuz I’ve already done a preliminary test, which you’ll see in Part 3 along with field tests which I haven’t done yet. Thanks for watching!

@marka9049 7 ай бұрын

I added a thumb to my bobcat B300 backhoe. Took 2 hydraulic cylinders before I figured out I needed a crossover relief valve as I bent the first cylinder when I rolled my bucket in to clamp on a log, and it collapsed the brand new thumb cylinder before i knew what happened. Minus the cylinders, crossover relief valve, and fittings, I built everything else from thumb to mounts and hoses. There were lots of trials and errors, but it was a total game changer and worth it! Great video

@DIYMyWay 7 ай бұрын

Yes, two other commenters mentioned the crossover relief valve so that will be featured in version 2.0 and is discussed in Part 3. Thanks for watching!

@tomszczepanski8951 7 ай бұрын

Martin, I have the same tractor and backhoe as you do and I also have added a hydraulic thumb. A couple of things I discovered that you may want to seriously consider. First you should not put the thumb valve/conection after the backhoe hydraulics power beyond circuit because the backhoe valve bank uses the power beyond circuit to dump the pressure relief valves. Your thumb valve blocks this circuit every time you activate the valve. So if you are moving the thumb and moving any of the backhoe cylinders you are running the risk of damaging the backhoe load valve bank/cylinders. To solve this problem just put the thumb valve ahead of the backhoe valve bank. The backhoe valve bank should allways be the last in the power beyond circuit. This is stated in the Kubota backhoe service manual. Second you should also consider putting in a hydraulic pressure crossover relief valve to protect the thumb valve and cylinder. I ran some hydraulic pressure tests on the thumb circuit and due to the geometry of the bucket, the bucket curl can put excessive pressure on the thumb circuit exceeding the thumb cylinder, valve, and hose specifications for max pressure. I used the crossover relief valve from Bolt on Hooks which from testing works better than the one from Summit. Take Care hope this helps, Tom

@DIYMyWay 7 ай бұрын

Hi Tom! Thank you for this great information! You got it to me in time to replumb the hydraulics and correct the information I gave in Part 2 in Part 3 for the benefit of others as well. Also, since your the second person to mention a crossover relief valve, I’ll definitely look in to it. Thanks again for your timely advice!

@GrampiesWorkshop 7 ай бұрын

How's she goin'? This is a very professional install Martin. It's fun to watch. I think the thumb will be a game changer eh!! Take 'er easy!!

@DIYMyWay 7 ай бұрын

Thanks, Mike! It’s sure been fun to do even though it’s fairly complicated. Yes, it will definitely be a game changer! Thanks for the visit!

@ItsaboutMakingnotBuying 7 ай бұрын

As always a great video! They never noticed me about your videos. Stay safe and warm. Later

@DIYMyWay 7 ай бұрын

Thanks, Mech! You too!

@RCAFpolarexpress 4 ай бұрын

Good Morning Sir, I hope that you are doing very well ( coldest morning this year up here -18.4 f ) Keep Warm Cheers 😇😇👌👌👍👍🍻🍻

@DIYMyWay 4 ай бұрын

Hi Dave! I’m doing well. I’ll be releasing more videos soon so stay tuned! Cheers!

@RCAFpolarexpress 7 ай бұрын

Good Evening Sir, You Are An OUTSTANDINGH HYDRAULIC BLUE PRINT DESIGNER SIR 😇👍🧐👌I like very Much Your SUBLIMINALL MESSAGE SENCE OF HUMOR SIR ( WELL DONE🤣🤣🤣🤣) You are also and OUTSTANDING Hydraulic Surgeon 🧐👍👍Nice welding's ( yes protection the hydraulic cylinders for sure !!! ) 🙏🧐 Have a nice Week End Sir Cheers 🍻🍻

@DIYMyWay 7 ай бұрын

Bonsoir Dave! Merci, mon ami! Yes, it’s been awhile since I used the subliminal message bit. Thank you for the kind words of encouragement!

@tractortalkwithgary1271 7 ай бұрын

Good evening Martin.

@DIYMyWay 7 ай бұрын

Good evening Gary.

@mattrung534 7 ай бұрын

Thank you for the videos, this is something I have been thinking about doing as well. The one modification I am considering is a dual crossover relief valve to put on the thumb cylinder so the two cylinders (thumb and bucket) can’t overpower each other.

@DIYMyWay 7 ай бұрын

You’re welcome! I think it’s well worth doing. My early testing suggest I won’t need a dual crossover relief valve as the cylinders are pretty closely matched and seem to have similar mechanical advantage. Thanks for watching!

@JCWren 7 ай бұрын

Martin, Harbor Freight has a set of 5 Allen wrenches in 3/8" drive sockets for $7.99. The set includes 5/32 in. , 3/16 in. , 7/32 in. , 1/4 in. , 5/16 in. , 3/8 in. That makes torquing the solenoid to block bolts easy.

@DIYMyWay 7 ай бұрын

That’s great to know, JC! Thanks!

@Frank-pv1hp 7 ай бұрын

Neat add on Martin. I have the L3901 and backhoe also. The mechanical thumb is nice but I'm liking the idea of a shop project. I also have a 3rd function for my grapple. Is there any issues with adding another one for the thumb operation?

@DIYMyWay 7 ай бұрын

Hi Frank! I don’t think there would be because my backhoe works with the 3rd function added exactly like it did before I added it. Thanks for watching!

@StubProductions 6 ай бұрын

Great video! Thank you for sharing with us! Excellent design and workmanship! On a side note… if you only had a 12” bucket for your BH77… would you buy a 16” or 24”? lol! Asking for a friend 😄

@DIYMyWay 6 ай бұрын

Thanks! Glad you liked it! Tell your “friend” that if I just had a 12”, I’d probably get a 24” to be able to get more material per scoop. 😉 BTW, Part 3 is out, if you haven’t seen it yet.

@StubProductions 6 ай бұрын

@@DIYMyWay Haha! Thank you!! I will share your advice. 😄 I’ll be sure to check out part 3!