Basic Hydraulics Question?

[kentrodngun]

Hi all. First off, Happy Holidays.
My qualifier is that I know diddlysquat about hydraulics, so be kind.

I bought myself an used Curtis snowplow for my tractor a couple of months ago. It has two single angle cylinders. I removed my bucket, installed the plow and I can lift it up & down. I figured I'd remove the quick connects on the valve & handle assembly for the dump & rollback features since I don't need these functions for the plow.

I attached, also using quick connects, the two single cylinder lines in the dump & rollback spots on the valve & handle assembly. When I moved the joy stick, the plow only angled in one direction. I reversed the quick connects and was able to move it in the other direction.

Is this normal? Is there anyway to make both cylinders function using my existing set-up? Any advice or insights would be very much appreciated.

 

[J_J]

Are the snow plow cyl single action SA? Does cyl have one of two hose going to cyl. Pictures of cyl and the valve you are using would be helpful.

 

[mmurphy]

Is this another regen valve setups? How many positions does this valve have on the tilt and roll back?

 

[kentrodngun]

I believe they are single action. Very simple stuff. Pictures attached.

 

[kentrodngun]

Is this another regen valve setups? How many positions does this valve have on the tilt and roll back?

Don't know if the attached will help answer your question as I admit, I don't understand what a regen set-up is.

 

[J_J]

In order to get a SA cyl to retract, you need an opposing force to push on the cyl rod. The angle cyl can be pushed in by the attachment, just by lowering and go forward. To lift the plow, power up and gravity down.

If your valve has regen, it provides a greater volume of fluid and will cause the cyl to operate faster, but with less power.

 

[kennyd]

Your problem is the "regen" or "regenerative" function of your valve. Read the first post in THIS thread for great info, also search the term "regen" for lots more reading.

What tractor/loader do you have?

 

[JD5210]

I read the post KennyD referenced and speaks to what is happening here.

Are there different forms of regen? The following was taken from the tech manual for of the 5X10. This explains at least to me, how the fast dump works.

The bucket spool is the inner spool valve of the dual selective control valve assembly. Besides the positions of neutral, extend, and retract, the bucket spool also has a regenerative position.

When the bucket spool moves inward to the regenerative position, neutral passages are blocked, causing a pressure rise at inlet passage. Oil flowing into inlet passage opens load check which allows oil flow to spool. Oil flows out extend port to head end of bucket cylinder. Oil returning through retract port from rod end of cylinder enters extend port and supplements flow passing to piston end of cylinder, causing bucket to dump faster.

 

[kentrodngun]

Your problem is the "regen" or "regenerative" function of your valve. Read the first post in THIS thread for great info, also search the term "regen" for lots more reading.

What tractor/loader do you have?

I've got an 1993 Kioti LK3054 with a KL122 loader.

I read the posts and now have a basic understanding of what regen is and why both cylinders cannot work. But, is there anyway to make the two cylinders work without a major upgrade to my spool valve set-up?

Suggestions would be most welcome.

 

[kennyd]

I've got an 1993 Kioti LK3054 with a KL122 loader.

I read the posts and now have a basic understanding of what regen is and why both cylinders cannot work. But, is there anyway to make the two cylinders work without a major upgrade to my spool valve set-up?

Suggestions would be most welcome.

You need to find out if you have a 4-way valve or not. I know on my machine there is a mechanocal lockout to prevent the joystick from moving into the regen position. I guess you need to call a dealer or the valve OEM. If you indeed only have a 3-way, then you could just add a new single spool valve after your FEL valve.

Have you tried pushing the joystick harder/further or not as far?