TDNelin
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I want to make my loader attachment a self-leveling unit as it raises and lowers. Are plans available? Maybe just the math to figure out how to make it?
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Load leveler
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mike0000
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I copied the one Kubota sells for my tractor, (L3901).
Pretty simple to copy if you can do a bit of fabrication.
Mike
Pretty simple to copy if you can do a bit of fabrication.
Mike
rScotty
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Mike, did you do an article on that fab? I recall several threads on auto-leveling but didn't keep any links. One was on a L39TLB I believe. I confess that I've never studied my own auto leveler to see how it works. Time to hit the books...
rScotty
mike0000
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No I don’t think I did, I’m away from my tractor but will try to post pictures to this thread once I’m home.
Mike
mike0000
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Here’s what I did, with 1/2” conduit, a solid rod bent at an angle (when bend is centered in eye bolt bucket is level). Eye bolt, a welded on nut/bolt to adjust level indicator rod (Which slides inside conduit). fabricated bracket at bucket.
Pictures
Mike
Pictures
Mike
BukitCase
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So far, all I see is a level INDICATOR - My ancient 580B loader is set up as a true self-leveling bucket - couldn't find a better pic, but the cylinder shown connects to one of the loader lift arms - the tee with two hoses runs to the pair of curl cylinders, and the upper link is maybe 8" away from the loader arm pivot. As the loader lifts and lowers, that extra cylinder acts as a PUMP that either adds or subtracts fluid from the CURL circuit.
So far I can NOT attest to how well it works, as that cylinder is one of 5 I've yet to rebuild and I'm fairly sure it leaks by (the other 4 are on the hoe - machine has 13 cylinders total)
Sorry, couldn't find a pic that shows more of that part... Steve
So far I can NOT attest to how well it works, as that cylinder is one of 5 I've yet to rebuild and I'm fairly sure it leaks by (the other 4 are on the hoe - machine has 13 cylinders total)
Sorry, couldn't find a pic that shows more of that part... Steve
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mike0000
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BukitCase, you’re right, I took the thread in a different direction, my mistake.
Mike
BukitCase
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No prob mike, even an indicator beats the crap outa guess-work; I found that out the hard way, decades ago on my little Oliver crawler loader - seeing the load end up on the ground isn't a very useful "indicator" 
Since the only "orange" tractor I'm likely to have is my Allis 160, I know exactly SQUAT about any auto-level options on Kubota that could be "xerox-engineered", but will be watching this thread with interest... Steve
Since the only "orange" tractor I'm likely to have is my Allis 160, I know exactly SQUAT about any auto-level options on Kubota that could be "xerox-engineered", but will be watching this thread with interest... Steve
mike0000
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I appreciate that BukitCase, to be honest I didn’t even know auto-level was a thing.
Mike
Mike
rScotty
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No problem. But self-leveling is a real thing and Kubota does have it on some machines. At least they do on some loaders. Our Kubota M59 has it built in. Fact is, I had forgotten it was there until just last week when I was borrowing a set of SSQA pallet forks.
and my friend said, "Does your Kubota have self-leveling?"
"Well, I think so...", I said......and pushed this lever down by the FEL control and what do you know? It does! Raised and lowered the arms and the forks stayed level.
It doesn't make any sound and no warning light that I saw - but the result is that as the loader arms are raised the forks would stay at the same level without any operator intervention. All the way up and down, same angle.
The only way it can do that is to have some sort of internal cam that automatically changes the amount of fluid in the bucket cylinders as the loader arms go up and down. That has got to be some pretty sophisticated circuitry, and very smoothly like all the M59 hydraulics. No bouncing or hesitation.
With a little experimentation I found that I can override the automatic function with the normal FEL control to change the angle of the forks or bucket. Then it will stay at that new angle all the way up and down.
This will be very handy for serving drinks at tractor parties. I can't wait. It could lift drinks from the ground up to a raised deck without spilling a drop. Better than the rickety stairs. A whole new life for the M59.
rScotty
Hey! My drink tastes like diesel fumes ....