BX7326 Rear Aux. Kit (install)

[CHDinCT]

Nice job Kerton, and very well documented for anyone else who wants to make the same/similar mod's. One question though. I thought I saw a needle valve on the tractor side elbow going to the hydraulic top link. Is that correct? If so, what part is that and how do you like it? Are you able to lock the cylinder in place when not in use? Thanks

 

[Kerton]

Nice job Kerton, and very well documented for anyone else who wants to make the same/similar mod's. One question though. I thought I saw a needle valve on the tractor side elbow going to the hydraulic top link. Is that correct? If so, what part is that and how do you like it? Are you able to lock the cylinder in place when not in use? Thanks

Good eye, and no, so far I don't like it. So I didn't recommend it in my write-up. Love some help if anyone knows.

That part is Surplus Center
9-7960-4 1/4 NPT 5 GPM PRINCE WFC-400 IN-LINE FLOW CONTROL 23.95

The reason I didn't describe it or include it is because I haven't got it to work yet. This is a "Flow Control Check Valve" and is "Designed to provide flow control and shut-off in one flow direction while providing free flow in the opposite direction." It has two paths for oil to flow: one allows free flow through the check valve in one direction, the other is path flows both ways, controlled by the needle valve.

I put it on the extend side, hoping to resist a pulling force from the weight of the implement. So, in theory, I can shut down oil flow into the extend chamber. In reality, where I live :thumbdown:, it works only when there is no weight on the QH. With no load, I can pull in, but cannot extend the top link when moving the valve lever. But as soon as there is weight on the forks, it drops like a stone when the valve lever is in extend position. Nothing is prevented by the closed valve. It's like the valve isn't doing anything!

Now, there is a reason not to put it on the retract side (rod side) of the cylinder. It's called Pressure Intensification, and I could never explain it better than this link, which describes my valve and setup if I put the valve on the retract side:
What is pressure intensification in hydraulic cylinders - Practical Hydraulics (Hidraulica Practica) - Find Information on Components, Manufacturers, Applications, Articles, Videos, Calculators, Formulas. Fluid Power at hand.
One difference from that link is that our load is actually pulling on the piston, thus making the intensification even worse. So I avoided putting the check valve there.

So I don't know what to do. Switch directions on the valve? Move it to the retract/rod side of the cylinder despite the pressure intensification risk? Any ideas?

PS: Obviously the best answer is a top cylinder with a double piloted check valve. But then, the top link project wouldn't be $160 all in, would it!

 

[CHDinCT]

Good eye, and no, so far I don't like it. So I didn't recommend it in my write-up. Love some help if anyone knows.

That part is Surplus Center
9-7960-4 1/4 NPT 5 GPM PRINCE WFC-400 IN-LINE FLOW CONTROL 23.95

The reason I didn't describe it or include it is because I haven't got it to work yet. This is a "Flow Control Check Valve" and is "Designed to provide flow control and shut-off in one flow direction while providing free flow in the opposite direction." It has two paths for oil to flow: one allows free flow through the check valve in one direction, the other is path flows both ways, controlled by the needle valve.

I put it on the extend side, hoping to resist a pulling force from the weight of the implement. So, in theory, I can shut down oil flow into the extend chamber. In reality, where I live :thumbdown:, it works only when there is no weight on the QH. With no load, I can pull in, but cannot extend the top link when moving the valve lever. But as soon as there is weight on the forks, it drops like a stone when the valve lever is in extend position. Nothing is prevented by the closed valve. It's like the valve isn't doing anything!

Now, there is a reason not to put it on the retract side (rod side) of the cylinder. It's called Pressure Intensification, and I could never explain it better than this link, which describes my valve and setup if I put the valve on the retract side:
What is pressure intensification in hydraulic cylinders - Practical Hydraulics (Hidraulica Practica) - Find Information on Components, Manufacturers, Applications, Articles, Videos, Calculators, Formulas. Fluid Power at hand.
One difference from that link is that our load is actually pulling on the piston, thus making the intensification even worse. So I avoided putting the check valve there.

So I don't know what to do. Switch directions on the valve? Move it to the retract/rod side of the cylinder despite the pressure intensification risk? Any ideas?

PS: Obviously the best answer is a top cylinder with a double piloted check valve. But then, the top link project wouldn't be $160 all in, would it!

Kerton, thanks for the update. Been offline most of last week so didn't respond. My understanding of hydraulics falls short of being able to recommend an appropriate valve for my situation and yours. When I put mine together, I looked at the various check valves offered by Surplus Center but couldn't figure out what I really needed or what exactly the differences were, so I went without one. I think if you posted the same info above in the hydraulics forum, you may get more feedback, probably from J.J. at least. Somebody there could probably suggest the right valve for holding the top link cylinder in the retract position. Otherwise, again, nice set up. I may have to change out to the longer cylinder myself one of these days.

 

[J_J]

Kerton

Did you install the valve backward?

The check valve that you posted, is supposed to provide full flow in one direction, and adjustable check flow in the other including shut off. If you fully shut off the valve, the fluid only has one place to go, on the other side of the piston.

So if you shut off the valve and the cyl descended with a load, that means that the cyl is bypassing.

 

[Kerton]

Kerton

Did you install the valve backward?

The check valve that you posted, is supposed to provide full flow in one direction, and adjustable check flow in the other including shut off. If you fully shut off the valve, the fluid only has one place to go, on the other side of the piston.

So if you shut off the valve and the cyl descended with a load, that means that the cyl is bypassing.

Thanks. I'll try reversing it when I get a chance, and then I'll edit this post with an update.

It's certainly not doing me any good as it is.

 

[2fast916]

CHDinCT,

By any chance, could you elaborate on how you installed your BX25 set-up and/or share photos? I'm about to embark on this project for my BX25 so I can operate a PTO blower chute & deflector with hydraulics!

Thanks in advance!!!

 

[CHDinCT]

CHDinCT,

By any chance, could you elaborate on how you installed your BX25 set-up and/or share photos? I'm about to embark on this project for my BX25 so I can operate a PTO blower chute & deflector with hydraulics!

Thanks in advance!!!

2fast916, you are asking about my dual rear remotes on my BX25, right? since I did add the Kubota OEM kit on my old BX1860, which was not possible on the BX25. Anyway, I did a thread on it here, so take a gander and hit me with any questions. Hopefully I can remember what I did back then if not in my old thead. - LOL.

http://www.tractorbynet.com/forums/...770-bx25-remote-valve-project.html?highlight=

 

[2fast916]

2fast916, you are asking about my dual rear remotes on my BX25, right? since I did add the Kubota OEM kit on my old BX1860, which was not possible on the BX25. Anyway, I did a thread on it here, so take a gander and hit me with any questions. Hopefully I can remember what I did back then if not in my old thead. - LOL.

http://www.tractorbynet.com/forums/...770-bx25-remote-valve-project.html?highlight=

I didn't realize there was a seperate thread but this is exactally what I was looking for...want to do something similar on my BX25. So the info stays in the proper thread, I'm going to post a question there...

Thanks!!

 

[CHDinCT]

Thanks. I'll try reversing it when I get a chance, and then I'll edit this post with an update.

It's certainly not doing me any good as it is.

Hey, tripped accross this old thread and was wondering if you tried reversing the needle valve and if so how it worked out. I'd be interested in doing the same if that fixed your issues. Let us all know.

 

[Kerton]

Sorry to say I haven't gotten to that yet. I'm doing lots of projects -with- the tractor for now.

But I will absolutely do it someday, and will post here when it happens. It's just a matter of priorities.