Adding rear remotes to kubota l35

[FF110]

I am fairly new to hydraulics but am learning a lot through this forum, so any help would be appreciated. I am going to add a set of remotes to the rear of my L35 and have a valve that I want to mount beside of the FEL control. I am trying to figure out the best way to tap into for the in port. Originally the plan was to mount the valve on the fender, but when I got it in I did not like the placement there so I decided to move it. I was going to tap inot the line for the backhoe at first but since moving the valve I am wondering what my options are. I do not want to run my in and out hoses to the back to tie into backhoe lines if there was some way to tie into the FEL lines. Any suggestions?

 

[J_J]

I think I would use the BH supply hose to feed the new valve and install QD's on the remote and plug the BH into the QD's.

The BH hose is probable coming from the FEL PB port to the back.

 

[MarkV]

I can't say if the L35 is the same set up as the B21 and L39 but the feed lines for the backhoe are not active when using the 3pt hitch. There is a diverter valve that redirects the flow from the backhoe to 3pt hydraulics.

MarkV

 

[J_J]

FF110,

IF your tractor has PB from the FEL valve, does the line run to the hyd block? Are the hoses to the back connected to the hyd block?

On my Kubota, there is slotted screw that you turn if using the outlets on the hyd block.

This selection allows hyd pressure to the back for my splitter and be able to raise the 3pt.

However, if the BH or splitter is not being used, there has to be a jumper for the two lines, or plug the male into the female QD. This completes the hyd circuit for continuous flow.

Any valve using the flow from the hyd block should be capable of PB as the BH valve or the log splitter valve must be able to take the full tractor pressure.

Some BH valve have PB and some log splitter valve have PB.

 

[FF110]

Thanks for the info. My BH lines have to be connected back to each other when it is not in use to complete the circuit. I had not thought about not being able to use the 3 pt. hitch the way that I was going to run it. I will have to go back and look again to see how I can run them. Most of the time that would not be a problem because most of the things that I would run with the remotes do not hook up to the 3 pt.

 

[FF110]

With my new valve being mounted beside of the FEL valve would it be possible to put a "T" in the power beyond line coming off of the FEL and run it to the "In" outlet of the new valve, and if this is possible where do I run the "Out" line.
This should allow me to run the remotes and the 3 pt hitch at the same time I think if it would be possible.

 

[J_J]

You should not tee into an open center circuit as the fluid must flow to tank,and the fluid will find a path or damage part of the system.

I am thinking yur selector for the 3pt and the hoses are like mine. I leav the seitch in the position that will allow me to use the log splitter and the 3pt .

This is the way I envision the flow, pump to FEL valve, to hyd block, and to 3pt, tank.

If the switch is turned the other way, The flow would be pump to hyd block to the hoses connected together, to hyd block , then 3pt , then tank..

Can you verify this.

 

[FF110]

I am not sure about the flow. I have a handle on the rear of the tractor that I switch depending if the backhoe is on or if the 3 pt. arms are on the machine. I do know that when the handle is in the backhoe position the 3 pt. arms will not move. Also could I have another question about the FEL valve. Could I run a line from the "out" port of the FEL valve to the "in" port on my new valve for the remotes and hook the line that is currently on the FEL valve going "out" to the "out "port on my new valve? The new valve is open center so it should flow through.

 

[J_J]

Just about any time you use the OUT port on a valve, and pass the fluid downstream to another valve, you risk the valve as the OUT port has a low psi rating about 250 to 500 psi.

The PB port is designed to take the pump pressure. Also, if the PB is being used, the only fluid coming out of the OUT valve is FEL cyl expended fluid. No pressure.

Do you have a hyd schematic of your tractor. I would like to see the path the fluid takes in both positions of the switch.

You could split the flow from the PB port into two paths, with a priority valve or divider valve..

The flow is split and the priority circuit is always getting a set flow, The other port will output the remaining pump volume to additional circuits. Some of these valve divide the flow equally.

Valves like this are used sometimes with power steering .

This is a priority valve.

Surplus Center - 3/4" NPT 7 GPM PARKER PRIORITY VALVE

 

[Stonehaller]

How many lines are on your FEL valve? If you have 7 total, 4 going to the loader cylinders and three going the tractor, then you mostly have a power beyond circuit. You could put a new valve, with a power beyond port, in series with either the power beyond circuit from the FEL valve or the supply to the FEL valve. You could tee into the existing tank line from the FEL valve for the tank from the new valve.

If you only have two lines from your FEL valve going the tractor, then you would have to put your new valve in series with the inlet supply to the FEL valve. You could still tee into the tank line from the FEL valve. The FEL would then be run from the power beyond port of the new valve.

It is import to make sure there is a relief valve in the system. If the only relief is integral to the FEL valve, then any valve added up stream of the FEL valve should have an integral relief as well.

 

[FF110]

JJ,
I found another post that I think will work.
http://www.tractorbynet.com/forums/...ng/140635-l35-l39-rear-hydraulic-remotes.html

They used the BH line for the supply of the valve. I think this will work fine with what I want to do.

 

[J_J]

JJ,
I found another post that I think will work.
http://www.tractorbynet.com/forums/...ng/140635-l35-l39-rear-hydraulic-remotes.html

They used the BH line for the supply of the valve. I think this will work fine with what I want to do.

Did you skip over my post #2?

 

[FF110]

I will try to explain how my tractor is set up, remember that I am a novice so bear with me. My FEL valve has 7 lines: 4 going to control the loader, the hose hooked to the "in" port comes from the hydraulic block under the seat, the hose that is hooked to the "out" port runs back to the hydraulic tank, the hose hooked into the PB port runs to the back of the tractor to hook into the backhoe.
After looking at it again I wanted to see if I could go from FEL PB port(Which now goes to the BH) to the inlet of my new valve and hook the BH line inot the PB port of the new valve. It seems like it would be the same as tying into the lines at the back of the tractor without having to run so many lines. If this would work would I run a line from the "out" port on the new valve and tee into the out port on the FEL valve, which runs back to the tank.
Also this is the valve that I got:
Prince One Spool Control Valve, Model# HC-V-R22 | Hydraulic Valves | Northern Tool + Equipment

 

[J_J]

Are you going to connect your BH to the remote valve?

 

[Stonehaller]

If you are going to connect the inlet of the remote valve to the backhoe supply, why not connect the outlet of the remote valve to the backhoe return? You could just get mating quick disconnects to plug your remote into the backhoe connections. You would not need a power beyond plug in the new valve nor would you have to tee into any existing lines. One issue is that you could not use the remote and the three point or the backhoe at the same time.

 

[FF110]

That sounds easier than what I was going to do. I found an older post from 09 that posed the same question and here is what was told to him

"This is really a straightforward and clean deal.
With the backhoe removed, you normally connect the jumper hose back onto the tractor so the hitch works after you move your two handles to allow flow to the hitch and open the tank port.

Take the QA hose and connect it to your aftermarket valve stack P port (pump/supply) - you can have as many valves/circuits as needed. The valve(s) must be open center type and able to handle 11 GPM flow at rated engine speed and 3000 PSI rated pressure.

The power beyond (PB) port or the return from the stack then has to be plumbed where the QA hose normally connects on the tractor.

The auxiliary valve stack / Top n Tilt will be upstream of the hitch circuit so it is important to attach is as above."





What I am going for is to be able to have a remote at the back of the tractor when the backhoe is off. I would possibly be using the remote with an implement on the 3 pt. hitch so I was trying to figure out a way to have the use of both at the same time. Mostly I will be using the remote for hay rake and tedder, they both have hydraulic fold for transport, the only other thing that I would possibly use it for is a post driver.

I found a picture of one that was done previously and they said that they had full function of 3 pt. with the valve.
http://www.tractorbynet.com/forums/...d1012583368-top-n-tilt-5-105697-pdc_00232.jpg

I think that I will plumb it like this the only difference is that my valve will be mounted up front and I will have to run the inlet, outlet, and the 2 remote lines to the back.

 

[Stonehaller]

You stated that you have a lever on the back that you switch between backhoe on and backhoe off and when the lever is in the backhoe on position the three point does not work. You also said you have to connect the backhoe connections together to complete the circuit when the backhoe is off. I am guessing that the backhoe is in the power beyond circuit ahead of the three point and that the lever either routes return oil from the backhoe connection to tank or to the three point valve. If that is the case, then you need a valve with a power beyond port to use the three point lift. Your back hoe in connection would go to the in port on the remote valve. The power beyond would got the backhoe out connection on the tractor. You could tee in the out (tank) line from the remote to the tank line from the FEL valve.

You really need to figure out your tractors circuit. With the lever in the backhoe off position, does the pump dead head if you disconnect the line between the two backhoe connections? If so, then I would say my assumption above is correct. If not, then you will not be able to use the backhoe connections to power your remote.

It is common for the backhoe to be in the power beyond circuit that feeds the three point. The backhoe return line can drain through the three point control valve to tank with minimum back pressure because you are not using the three point with the backhoe. However, if you are going to use the three point, then you should feed it with a power beyond port.

 

[FF110]

I am not real sure what you mean by dead heading when the selector lever is in the 3 pt position. From the best I can figure out what you described should work. What do I need to do to confirm that this set up is how you described? I have tried to find a schematic of the hydraulic system but have had no luck. Any ideas?

 

[Stonehaller]

By 'dead head' I mean blocking the flow which causes all the oil to dump over the relief valve.

If the hose on the back of the tractor for the backhoe is the 'in' or supply pressure for the backhoe, then with the tractor off, you could take the quick disconnect fitting off the hose and put the hose in a clean bucket. Make sure the three point lift is down. Put the diverter valve in the three point position and put the three point lever in the raised position. Start the tractor at idle. Is the bucket filling with oil? Does the three point not raise? If so, then hose is part of the power beyond loop and you can put your remote in series with it by using the backhoe connections. If not, then you would have to put the remote valve in series with the power beyond line from the FEL valve.

If the hose on the back of the tractor is for the return line from the backhoe, then you would need to get another hose and mating quick disconnect for the other backhoe connection (possibly off the backhoe) to do the test I described above.

Another method to test the circuit is to start the tractor with the hose disconnected. First, with the tractor at idle, curl your FEL buck all the way against the stop and briefly hold the control valve lever in the curl position. You can hear the engine strain as the pump produces maximum pressure. You should also hear some hydraulic noise as oil goes through the relief valve at high velocity.

Now if you start the tractor with the diverter valve lever in the three point position and the backhoe loop disconnected do you hear the same noise? Will the three point lift rise? Do not let the tractor run long if you hear the hydraulic noise or hear the engine lugging. The tractor may not even start. If it sounds like the starter is straining excessively and turning over slowly, then stop. It means that the hose is supplying the three point.

 

[Cantoo]

FF110, I have a L35 and added a grapple to the loader. What I did 1st was just pulled the backhoes lines off and used that for the grapple. I mounted a Valve beside the loader vale bank. Worked great for what I needed until I wanted to use the backhoe at the same time. Not a problem when the backhoe was off the machine but when it was on and arms or boom settled I would have to put the hoses back on to raise it. Became a pain in the azz because I started using the grapple for brush, stumps etc while using the backhoe for rooting out stumps. I also have a power angle blade for it and need to be able to use hoe and the angle at same time.
So I decided I could just T the backhoe lines. Nope that didn't work either, pull the grapple valve and the hoe would move. I still haven't changed the lines back because I haven't had time yet but now that it's winter I'm gonna play with the system and finally figure it out.
FYI, not sure if you have the 3 point hitch arms for yours or not but if you do could you measure them for me? I don't have the factory ones, I rebuilt a set from some other tractor but my measurements are a little off and it's causing me some problems. I just need the total length from ball to ball on them. I think mine are a little short. I've built a lot of stuff for mine that might interest you, a few pics are on arboristsite.com. Have to join the site to see pics. I built a cab, snow blade and a few buckets last winter. Search there using my user name, same setup as here.