Power Broom Angle Cylinder Acting Weird

[Tractor_Chunks]

I connected my front power broom to my B2601 for the first time today. First time removing the loader and attaching the front hitch. Everything mostly went fine, but when I connected the hydraulic lines for the power broom angle cylinder, I could only get it to angle left.

I move the hoses to the up/down loader control, and the left/right angle worked fine. Hoses back to the curl control, and still only angling left. Then I realized it was angling left when I moved the stick left, AND when I moved it right. So any stick movement left or right progressed the cylinder further left.

Went through this a number of times, then tried swapping the angle hoses (on the curl valve) and everything worked fine, except stick left made it angle right, and stick right made it angle left.
Swapped them back and it did the angle left only thing again.

What's going on here?

 

[shelkol]

You need a third function valve. The curl valve is a regenerative circuit and it usually connects both ends of the curl cylinder together to help it dump faster. Some loader valves have a 4-way which means you could move the stick further to the right and it would work normal. If you don't have that position, then you need the third function which is just another valve

 

[Tractor_Chunks]

Ooooh, the "power dump" or whatever it's called. I forgot about that. So I should try pushing harder to the right - I'll go give that a try.

But that still doesn't explain why it works fine reversed.

 

[RBA50]

Yes, actually , it does! There is less area for the fluid to push against on the rod end of the cylinder, so by reversing the hoses you changed the forces in the cylinder and overcame the regen "feature". Only problem is everything works backward.

 

[Tractor_Chunks]

Well, it works in the correct orientation. But to angle right I have to push the stick all the way to the right and there's no easing it. If I'm operating the broom at full revs popping the stick all the way over to the right is somewhat violent and hard to control the angle, and that's no good. I'm better off with backwards control.

I think I need to learn more about hydraulics because I don't understand why it works one way but not the other, short of some type of valve in the cylinder.

If I just flip the cylinder, would I get what I want?

 

[shelkol]

You have to put the cylinder on the other side of the pivot. Just flipping it end for end doesn't work

 

[Tractor_Chunks]

You have to put the cylinder on the other side of the pivot. Just flipping it end for end doesn't work

Haha. Well, you got me laughing at myself. Duh

Is there no simple solution here? I can't believe this was what Kubota intended.

 

[Tractor_Chunks]

Interestingly, someone else posted a comment 13 hours ago on this video that they're suffering the same issue with their B2401 and broom: