Valve Selection for Rear Remotes

[jdfire]

Hello All,

I think I have read just about every thread on this forum regarding adding rear remotes for a TNT system. You guys are awesome. Thanks to your help I have just about everything figured out, but I have a question about my valve selection.

My tractor currently has a 1/2" ID line running from the FEL PBY port to the backhoe. I am planning on putting the new valve in this line. Based on KennyD's recommendation I am thinking of using the 2 spool, 7 GPM joystick valve from Surplus Center. My tractor hydraulic system is rated at 6.87 GPM so I think the valve should be okay. My concern is that the in/out/pby ports on the valve are SAE6 (3/8"). Although the valve is rated at 7 GPM do you think this will become a restriction in the flow to the backhoe?

The next size 10 GPM valve at Surplus has SAE8 (1/2") ports, but includes a regen feature, which I wouldn't really need in this application (not to mention it is $50 more).

Any thoughts would be appreciated.

Thanks,
Dave

BTW How do you add an inline hyperlink when posting messages?

 

[kennyd]

Dave, look at this valve from the Surplus Center- 9-7677, solves your dilemma for $200.

BTW How do you add an inline hyperlink when posting messages?

I do it like this:

-Type the text you want to display
-Open a new tab/window with the link you want to copy and "copy" the address in the line at the top
-Switch back to the reply window
-Select (highlight) the text you want to make the link, then press the picture of the world in the top-center of the reply window.
-When the pop-up comes up just "paste" your link into the box and click OK.

 

[jdfire]

Hi Kenny,

Thanks for the reply. I guess I was hoping to use the 7 GPM valve due to its smaller size as long as it didn't cause a flow problem. Here's my thought: the valve is rated at 7 GPM so the port sizes must be appropriate for that flow rate and even though my backhoe has a 1/2" supply line the tractor pump still can only put out 6.87 GPM. The 1/2" line probably helps reduce friction loss. Any comments would be appreciated.

Thanks,
Dave

 

[kennyd]

Tough call Dave...not being an "engineer" but rather a seat of the pants kind off guy I think I would go for the 7GPM valve. It meets specs so that is good enough for me.

 

[3RRL]

I agree with Kenny that the 7 gpm valve should work fine.
Click here Hydraulic Reference and scroll down to the flow capacities of hydraulic lines chart. It shows that 3/8 hoses can safely carry 7gpm.
Rob-

 

[JMynes]

jdfire,

Is this the one you are looking at?

 

[jdfire]

3RRL: Thanks for the reference chart. Looks like another good one to hold on to. My main reason for adding the remotes is for a TNT system. I bought a new boxblade after seeing the many accomplishments you have made with yours.

JMynes: Yes that is the valve I am considering. KennyD had recommended it in some other threads for TNT systems. It looks like a nice compact valve.

I think I'll probably give the valve a shot. I figure that even if the valve ends up having an effect on the backhoe performance it wouldn't be too difficult to plumb the valve with disconnects and take it out of the series when using the backhoe. As it is now I wouldn't be needing the valve when the backhoe is attached unless I added a thumb to the backhoe in the future.

Thanks

 

[kennyd]

I figure that even if the valve ends up having an effect on the backhoe performance it wouldn't be too difficult to plumb the valve with disconnects and take it out of the series when using the backhoe. As it is now I wouldn't be needing the valve when the backhoe is attached unless I added a thumb to the backhoe in the future.

Thanks

I doubt you will notice any difference-and how often do you run your engine at full throttle when operating the BH anyway? My point is that you will only have that 6.87GPM flow at full throttle anyway.

 

[jdfire]

Thanks Kenny. Just ordered the valve today.

 

[jdfire]

Well, I received the valve but my tractor was still in storage at my sister's farm. Finally brought the tractor back home the other day so I can work on this project. Played around with a few locations for the valve and think I found one that works pretty well. The first two photos show the valve held in position with a couple temporary straps. In the final installation the valve will be level instead of tilted up like the photo. Seems to be a comfortable position when sitting in the seat. Easy reach without being in the way. Now to work on a mounting bracket. Unfortunately my metalworking skills and tools are not on the same level as many of yours, but I know just enough to be dangerous Should be fun!

I will also be installing a selector valve on the outbound PB port from the new valve that will direct flow to either the backhoe or the 3pt. This is similar to how the tractor is currently plumbed. There is a hose coming from the FEL PB that either connects to the backhoe or plugs back into the manifold (3rd photo) on the side of the tractor to power the 3pt.

After seeing where everything was going to be mounted I went through and figured out all the connectors, adapters and hoses I would need. I placed an order with Discount Hydraulic on Friday. Because I'm not exactly sure where all the lines are going to be routed I am going to try reusable fittings so that I can make the hoses myself as I see where they will fit.

Have a nice day everyone!

 

[kennyd]

Good deal JD, but I don't think you will need the selector valve...just put some QD's on the OUT port of the new valve so you can "plug" the backhoe into the loop.

The location looks great...bring it over here anytime and I will help you with the bracket

 

[jdfire]

Hi Kenny,

Thank you for your input. Your insight is always appreciated!!

The reason I thought I needed a selector is because currently when I hook up the backhoe (subframe style) I unplug the FEL PB line from the manifold on the side of the tractor that feeds the 3pt system and connect it to the input line coming forward from the backhoe. This disables the 3pt system (which I believe is downstream from the FEL) while the backhoe is attached. When dismounting the backhoe, the PB line is disconnected from the BH input line and reconnected to the manifold, which re-enables the 3pt.

The first photo shows the PB line connected to the BH line and the second photo shows the PB line reconnected to the manifold.

In the new installation I am treating (hopefully correctly) the PB coming from the new valve in a similar fashion but just using a selector instead of disconnecting/reconnecting lines. One output side of the selector would be a QD for the BH to hook to and the other output would be plumbed to the manifold. Position the selector in one position and the backhoe is powered, move it to the other position and the 3pt is powered.

Just to summarize my plumbing plan for the new valve (disregarding work lines for the moment) I am planning on going from the FEL's existing PB to the new valve IN. The new valve's OUT would be returned to the tank and the new valve's PB would be connected to the selector (in effect, the BH or 3pt).

Make sense or am I way out in left field?

Thanks again.

 

[kennyd]

Thinking...

Have to run out-will reply later

 

[kennyd]

OK JD I am back...

I understand what you are doing, and it will work just fine. I was just thinking you could eliminate the extra valve but possibly not as I am not familiar with your machine. But what you propose is certainly well thought out and acceptable.

 

[jdfire]

Thanks Kenny. I appreciate your feedback. Now I just have to wait for my package to arrive from Discount Hydraulics! Have a great night.

Dave

 

[3RRL]

Good job Dave,
In the long run, although QD's like Kenny first suggested would save you the cost of another valve, switching the selector valve will be a lot easier and less stress than having to disconnect and reconnect them. Sometimes they can be fussy to get back together. It might be another expense, but IMHO, well worth it.
Like Kenny, I always try to be as frugal as possible.
But time and effort saving additions like that quickly make up for the cost. At least that's what I tell my wife.
Good luck and let us know when you get your stuff together.
Rob-

 

[jdfire]

After reading JJ's recent post regarding Hydraulic Fluid Injury in the Safety section, I'm having second thoughts about the location for my new remote valve. As planned, all the hydraulic connections to the valve will be right by my shoulder. Am I being paranoid or should I look for another location?

 

[kennyd]

After reading JJ's recent post regarding Hydraulic Fluid Injury in the Safety section, I'm having second thoughts about the location for my new remote valve. As planned, all the hydraulic connections to the valve will be right by my shoulder. Am I being paranoid or should I look for another location?

Just cover all the hoses with protective sleeving-leave it a little long, then pull it up over the fittings and secure with a Ty-wrap...

 

[jdfire]

Well, I finally got my valve and rear remotes installed! Took a little longer than expected, had to change plans a couple times, you know ... typical project. After I received my valve I decided on a mounting location so that I could then figure out where I was going to run all the hoses.

Pictures 1 and 2: Made a bracket that would wrap around the ROPS so the safety police wouldn't get me for making any modifications.

After deciding on a valve location I ordered all the fittings and hose from DHH. While waiting for the parts to arrive I think my tractor shrunk because after the parts arrived and I started laying everything out like I had planned in my head, there wasn't as much room as I had imagined. I was originally going to run 1/4" hose from the valve to my quick disconnects but found it was easier to just mount the quick disconnects to the valve. They are still close to the back of the tractor and should work okay.

Pictures 3 and 4 show the valve mounted to the ROPS.

To be continued ...

 

[kennyd]

Nice work so far JDF