Need Help on Hydraulic Issue

[SPYDERLK]

Weight of the bucket aids dump. The regen can only work on an extending cylinder, so the valve does not have a regen circuit on curl because it would be futile [it would just cause a fast dump] . Regular slo dump can cavitate [form a bubble] on the piston side and can give floppy bucket after slow dump -- but sometimes you need to dump slo. When you dont, then dump fast using the far right regen position. This applies pressure to both sides of the cyl so no bubble.
larry

 

[J_J]

82 here today.

 

[KOLBRNR]

Weight of the bucket aids dump. The regen can only work on an extending cylinder, so the valve does not have a regen circuit on curl because it would be futile [it would just cause a fast dump] . Regular slo dump can cavitate [form a bubble] on the piston side and can give floppy bucket after slow dump -- but sometimes you need to dump slo. When you dont, then dump fast using the far right regen position. This applies pressure to both sides of the cyl so no bubble.
larry

I never thought about that. The weight of the bucket aiding in dumping.
I will give it a try tomorrow. Man I have gone to a lot of extra work trying to get this thing going. I am going to be quite annoyed if all I had to do was move the lever less. I never would have figured that one out.

Tomorrow we will see

42 here right now but tomorrow is going to be a whopping 59

Russ

 

[KOLBRNR]

OK guys I tried it. I think your right on the money about what is going on. When I move the lever to the dump position with the solenoid activated I can see both hydraulic lines flex as the pressure builds but the blade does not move. It does not matter how little I move the lever the blade will not angle right. Left to the curl position is not a problem.

Now that we know what is happening what pray tell do I do about it? How can I get around this regen situation? I don't want to have to buy a new tractor just to operate the blade.


Is there a better way to be doing this? Should I be teed into the power beyond and have a valve with 2 solenoids? 1 for left and 1 for right? I have a three function handle on the joystick so I could use the 2 buttons on top and disregard the trigger on the front.

Thanks so much for you help thus far. I don't know that much about hydraulics. That is why I hired a hydraulic guy to do this for me. However so far I am the one who is working on the solution.

Russ

 

[J_J]

Regen is only on the curl dump.

Someone else had the same problem, and I believe they either switched to a non-regen valve, or replaced the curl spool with a non-regen spool.

It is possible to add another independent two spool valve with PB and use that to control the blade, and use the regular loader valve for curl and lift.

 

[KOLBRNR]

Good morning JJ. Your an early riser like me.

I was wondering about the PB circuit. I don't know about a non regen valve. I will have to check into that. It would be easier at this point to use the curl dump as the lines are done already.

You don't know of a valve I could get do you?

Thanks I will keep you guys updated on how this goes.

Russ

 

[J_J]

Have you tried switching the diverter valve to the lift cyl circuit and using the lift lever to control the blade?

 

[KOLBRNR]

No but I can do that. It would only be more hose and fittings. I still have the original hoses so undoing it is easy. If there is no regen on that circuit then it would work, wouldn't it.

Good idea thanks JJ

I'm off to church so I will away from the computer for a bit.

Russ

 

[SPYDERLK]

Good morning JJ. Your an early riser like me.

I was wondering about the PB circuit. I don't know about a non regen valve. I will have to check into that. It would be easier at this point to use the curl dump as the lines are done already.

You don't know of a valve I could get do you?

Thanks I will keep you guys updated on how this goes.

Russ

Hey Russ. I have regular [power] dump and regen dump inherent in my valve - chosen by the amount I move the lever. Your valve sounds as if it only has regen dump. Pls try this: Press your bucket flat to the ground, center the valve, and then try to dump by pushing the lever rightward -- brakes OFF. Mine will tip the bucket forward and lift the tractor. Does yours at least almost lift it? It should I think, because I didnt know they made any loader valves that exclude the power dump. If it doesnt lift well go from there.
larry

 

[dstig1]

Well I think the solution is the same thing I posted earlier - T off of your lines for the angle cylinder and run hoses to both ends. Then they will behave exactly like the bucket cylinder and the problem should be solved. If you are feeding fluid to both ends of the cylinders it will not lock up. You have that small block on the plow bracket which would be a perfect point to T from. You just need to cross over these lines (T goes to far end of one, close end of the other). So a couple fittings and hoses, and you should be good.

Edit: BTW, the manual on my 723 loader says there is a non-regen position on the dump valve. There are 2 versions - the older one has the regular mode that is all the way to the right. So just barely opening it puts you in regen but full push is normal mode. The newer valve appears to be the exact opposite.