Kubota Backhoe BH77 Cylinder Problem Fixed !!!
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- Опубликовано: 3 окт 2024
- My boom cylinder seems to not be working correctly. The second example in the video is probably the clearest. I think when I push the control forward the main Boom should lift the tractor off the ground? And it does not. It seems as though it reduces the affective digging force by not engaging correctly. So I replace the relief valve on the main boom hydraulic valve and it fixes the problem.
Link to the relief valve
www.messicks.c...
Kubota: ASSY VALVE, RELI Part # 7K502-63710
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Due to factors beyond the control of Daniel Woodell, I cannot guarantee against improper use or unauthorized modifications of this information. Daniel Woodell assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Daniel Woodell recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Daniel Woodell, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Daniel Woodell. 
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Update 7/20/21
Picked up new relief valve and installed. No difference. Still will not pick up back of machine. It starts to lift and then releases. So I keep researching.
Thanks. Mine just started doing this morning putting in posts for fence. My first thought was relief valve but was not sure which one it was. I have same tractor and backhoe. You saved me a ton of time. I will let you know after I change it how I make out.
Thanks for the video. It helped me figure out my problem.
I have an L-39, the hydraulic thumb was acting up, no closing power. It's only got 500 hrs on it, the thumb, maybe 3 hrs. I took the relief valve off, the little plunger was stuck in. Called for a new one, $800-$900, depending how stupid I look I think. I took it apart, simple inside, cleaned it, put it back on, fixed. Never messed with the pressure setting. KEEP THE OLD ONE, it might be fixable.
Thanks for the video again.
Forums can save lives. Great Job Man!!
Thank you very much! You're post saved me tons of money, ordered the relief valve and fixed the same problem you described. Much appreciated!!!
ive had problems since i bought my Kubota with the BH77 backhoe not working properly. kubota took it for over a month. changed the valve body, came back worked great then same issue you had but mine was the left or right would move slow. kubota took it again!! they actually took it several times. every time it came back same issue with the relief valves. they took it one final time and fixed it. once again worked great and it wont pick up the boom. ive taked the relief valve apart cleaned it and worked. parked it and it dont work again. i havent taken it apart since. when i did clean it there was a piece that was black and looked like a piece of rubber. I'm debating buying a new relief valve like you have since when they took the machine when it was new they did change the relief valve and in about a half hour it had the same issue. I called kubota and they would not do anything.
Thanks Daniel, always great and informational videos. Love how organized you are as well, gives me comfort for my garage ocd. lol
Nice to see what those valves look like; and see your resolution after viewing your early video clip on that challenge to figure out. ... Videos like yours along with many informative comments are definitely part of my learning more all the time program 🤔 :+)
Thanks so much! Had the opposite to happen to my B26 TLB. Rebuild the boom cylinder first before saw your post. Mine was $821.38 tax included.
Thank you. I added this video to my "how to library" for future use.
Had the same issue with our Kubota backhoe BH77. THANK YOU.
I just ran a kubota backhoe similar to this one, it was a beast for sure. I didn't experience this problem with it, but I will be buying a tractor eventually so good to know how to fix this in case I have a similar problem
Thanks for video, you saved me alot of time and aggravation.
Your videos are awesome. Hopefully you do more tractor videos. I’d watch welding how too videos too.
Thank You! Same issue. Saves me a lot of hassle.
Great fix for the Kubota! Does the factory rebuild those relief valves?
Great video and good intel. The BH77 is a beast of a backhoe for the size. Yep, pulled many a stump with it.
THANK YOU!!! I have the same issue and some say its an o-ring, but if your opening it up might as well replace the part and recondition the old one!
Knew it was the relief valve as soon as I saw you were able to move the poppet pin with your finger
I appreciate this video mine just started doing this not constant but had a couple different times now I know what to look for thanks.... To solve it I would just shut the tractor off and restart it till next time
Im having a similar issue with my stick cylinder. Im gonna give this a try. Thanks
Thanks for the video.
Cool video. I see that backhoe has a little more gumption than my bx23s. I've never not gotten a stump out with it but it definitely takes me longer and more moving around.
Ok im 2:35 in and im going to say it's either bad packing inside the boom cylinder, or the relief valve in the main loop is faulty???? Ok let me finish watching and see if I'm correct
How many hours would you estimate you had on the BH77 when you had to replace this relief valve?
My bh77 is doing the same thing , my question is could you not just remove the pressure relief val. and replace it with a plug.? some of the other spools in the same assembly just have plugs.. they work fine without these P.R.val.
Absolutely not!!!! You would overpressure the cylinder in the best case scenario you would blow apart the seals, in the worst case catastrophic failure of the cylinder or potentially pump!!!
Thanks, I have the same set up , my cylinder is starting to get weak
kubotas allways make there tractors and equipment so simple and easy to fix or work on wich why love the kubotas not bad for 2 valves $370 same at my dealer and deeres are $790.00 each wich rediculas
Have an outrigger that goes out on its own. Lever is hard to push to retract the outrigger also?
In that specific case, I would think that it was the spool inside of the spool valve. Usually when the handle is hard to operate it’s because an O-ring on the spool is failed or become damaged in someway.
Are there 4 relief valves where there is one for each direction or are there only 2 ?
Anyway move the relief valves between the 2 circuits and see if problem moves
If it does I would but 2 new relief valves
Had same problem on an old dump truck. Bed would start to raise and then fall right back down. I was about to replace whole pump before I realized problem. How well does your backhoe work while performing double functions? I've ran several backhoes and excavators but never a tractor mounted hoe. Everyone I've ever seen run one has been real jerky. I was curious if it's because there's not enough flow to efficiently perform double functions...or if everyone I've watched run one is just inexperienced. By your video you seem to operate yours pretty smoothly. I wasn't sure if the speed of video was just hiding the it though. Considering buying one within the next year to use around farm so I'd really like to hear your input.
Having the same problem except it is relief valve malfunctioning when i swing the boom to the left. Slow and No power. The relief valve part costs $433.00 which seems like robbery to me. Any thoughts on how to repair the relief valve.
Nice job
Thank you
Great video
I didn’t know what to expect, but ~$375 was not it.
😳😳😳
Thanks for sharing
Thanks for watching I hope it helped.
@@DanielWoodell
Don't have that problem yet, but did find most of my control linkage bolts were loose and coming off. Might be worth a look. Take care.
how much was it?
$475.00 for relief valve
@@roymiller9241 I paid $700.00
B26
My buddy just went through this. These problems are exactly what he is experiencing. We replaced the valve and it still is acting the same. It worked fine for a few hours now it's back to acting the same way. Buddy reports might even be worse. Any ideas what it might be?