newbie with chute rotator problem

[JHill]

I wish to say hello to all on the forum. I have been watching and learning from this forum since last September when I picked up my 1st tractor, a bx1850. The knowledge of the good people here gave me the confidence to build my own hydraulic chute rotator, but I now have a problem. I will try to explain the best I can.
With the hoses attached to the two remaining connections from the loader control, the hydraulic motor will only rotate one direction. In the other direction, the hose will charge, but the oil will not return thru the valve. So I tried attaching to the connections for the quick hitch, and it worked perfectly. So I then tried leaving what would be the retun line for a left hand rotation where it was, and put the supply back where it was originally, and it would work, but only if the valve was in the float position.
So, to sum up a long story, the valve position to curl the bucket will rotate the chute to the left correctly, but the dump position will not rotate it to the right; the oil is trapped. This surprises me since the single bucket piston seems to be a two-way piston; when you curl your bucket, the oil must go somewhere.
So I am hoping there is someone here with experience with this that can set me in the right direction. The rotator kit from kubota was over $700; I am just under $200 into it now. I guess there may have been more to the kit than I thought.
One other thing. The stock chute only rotates 220 degrees. The last picture shows that I cut notches in the chute rim all the way around; I wanted 360 degrees of rotation so it wouldn't bind and break something. I know it's not recommended to be able to blow snow at yourself; I'll just have to be careful. Anyways, I am building a cab for it; those will be pictures in a different thread when I get further along. I presently have my panels cut out, but they need to be installed, painted, glass installed, etc.

Thanks to all, Jody

 

[J_J]

Exactly which ports on the loader are you using. Do you have something like this In, OUT, PB, A, B, C, D, or 1, 2, 3, 4, something similar. Which number or letter designation on the ports, is the motor connected to.

Maybe you are plugging into the wrong QD.


Are you using a diverter?

 

[brandoro]

I went through the exact same thing when I put the front mount blower on my tractor. Hook all the hoses up the way they should work and push the lever as though to dump the bucket but push it right through the detent and the chute will rotate full tilt that direction. My manual for the FEL told me about that but I didn't know enough about hydraulics to understand what it was telling me. Others on this forum came to me rescue when I posed the question. Apparently it is set up that way so you don't have a floppy bucket when using the FEL.
The Kubota kit came with flow restrictors for both lines, very small holes in them and the chute still rotates plenty fast. Don't just put a restrictor in one though or you could overpressure the hydraulic motor.

 

[JHill]

Exactly which ports on the loader are you using. Do you have something like this In, OUT, PB, A, B, C, D, or 1, 2, 3, 4, something similar. Which number or letter designation on the ports, is the motor connected to.

Maybe you are plugging into the wrong QD.


Are you using a diverter?

Well, I just answered my own question when I was just installing the loader. You have to push the valve ALL the way to the right to roll the bucket with power, otherwise it is just a float. It is kinda like the float on the boom, except it doesn't lock in place, and it floats before it charges the piston. Anyways, I tried it out after I smartened up, and it works great!

Thanks for the reply, Jody

 

[J_J]

So, it appears that, that first position is regen position, which will give double the volume, but half the pressure, and the second would give full pressure and slower dump speed. . Did the motor not turn at all in regen mode?

It seems like the regen mode will cut the torque about half.

Did the bucket not dump fast in the first position? If it did, then the hyd motor should at least turn, but slower.

 

[J_J]

Float position is usually the second or further out/ last position, and the lever stays in that position until pulled back to neutral, so I don't believe it is float mode..

 

[brandoro]

The first position charges both lines equally but the side of the cylinder with the bigger area will overcome the side with the smaller area so the bucket still dumps. If you go past the detent it only charges one line but there will be a slight delay to raise (curl) the bucket because that line has to charge. The "floppy bucket".
Since the position past the detent only charges one line it will then rotate the chute.

 

[mmurphy]

Float position is usually the second or further out/ last position, and the lever stays in that position until pulled back to neutral, so I don't believe it is float mode..

JJ, I am like you, I can not keep straight which one comes first! Or do they change from one model to another?

 

[J_J]

Logically, you want it to dump fast to save time, but in the dump mode, the load will almost dump itself. Now, if you had the bucket on the ground, and you wanted to raise the tractor off the ground, the first position might not do it, because of the lower pressure. If you then go to the second position, past the little detent, the cylinder gets full pressure if it can develop it, and that is where you have the most force. Float mode is different, and that applies to the lift cylinders. The float mode should be at the end of lever travel, and locked in detent until it is forced back to neutral.

Some valves have detent in both, lever fwd, and lever reverse. A motor circuit would use something like this. You don't need detent in a lifting circuit either. You probably will never need regen in a lifting circuit, nor in a curl up, as you want force in the curl up.

Even some of the log splitter valves have regen in the first position, to move the cyl fast up to the log.

 

[kennyd]

Well, I just answered my own question when I was just installing the loader. You have to push the valve ALL the way to the right to roll the bucket with power, otherwise it is just a float. It is kinda like the float on the boom, except it doesn't lock in place, and it floats before it charges the piston. Anyways, I tried it out after I smartened up, and it works great!

Thanks for the reply, Jody

Jody, what you are experiencing is called "regen" or the regenerative function of the loader valve. This problem comes up frequently, and is discussed in detail in THIS thread. Also, a search of the term "regen" will turn up LOTS of post's about it.

Short answer is you have to push the joystick far over to the right to get it to work because Kubota put's the regen in the first part of the throw, rather than the second part like everybody else.

Oh, and Welcome to TBN