Guys, I'm new to the site and probably know just enough about tractors to get myself in trouble. I have a L2500 with a LB400 loader. I am trying to install a Sabre Samuri cutter. It's run by hydraulic running through a motor driving a verticle cutter. It's a continuously running motor with fluid running in then out to the tank. Can I tap the pressure line out of the pump with a tee and put pressure through the motor then dump to the tank? I would have an on off valve between the tee and the motor, to turn the motor off when not needed.
Tapping into hydraulics to operate a Sabre Samuri cutter
- Thread starter Redstickla
- Start date
Red, Welcome to OTT
No, you cannot Tee into high pressure hydraulic lines, all new valves must be added in series. How many lines does you FEL valve have connected, 6 or 7?
Here is a general schematic to ponder: http://www.baumhydraulics.com/files/infobuild/basic_hydraulic.pdf
No, you cannot Tee into high pressure hydraulic lines, all new valves must be added in series. How many lines does you FEL valve have connected, 6 or 7?
Here is a general schematic to ponder: http://www.baumhydraulics.com/files/infobuild/basic_hydraulic.pdf
There are 7. 4 lines out to the bucket operation, 1 line out running to the back of the tractor under the seat ( this line i was going to tie into coming ot of the cutter motor), 2 lines connected to the hydraulic block and into the FEL one in and the other power beyond. The power beyond is what I don't understand. I'm told it operates the 3 pt. I don't get how something running from the hydraulic block to the FEL, runs the 3pt.
Red, welcome to OTT from Canada, I am interested in your project. Post pictures of your progress please.
Red, to be clear, it doesn't "run" the 3PH, but it does "feed" fluid to the valve (rockshaft) that operates it.
Generally, the flow from the pump is like this:
-OUT of the pump to the IN or P of the FEL valve
-PB from the FEL valve to IN of the rockshaft, or actually the "block" you have on the tranny.
-OUT or T of the FEL valve to the tranny case, this carries only "waste" oil from the workports to be returned to the sump.
So, you would take the PB line from the FEL valve, to the IN of your new valve, then the PB of the new valve to the block. The OUT of the new valve can be Tee'd with the OUT of the FEL line-that the only one that can be Tee'd.
Clear as mud?
Generally, the flow from the pump is like this:
-OUT of the pump to the IN or P of the FEL valve
-PB from the FEL valve to IN of the rockshaft, or actually the "block" you have on the tranny.
-OUT or T of the FEL valve to the tranny case, this carries only "waste" oil from the workports to be returned to the sump.
So, you would take the PB line from the FEL valve, to the IN of your new valve, then the PB of the new valve to the block. The OUT of the new valve can be Tee'd with the OUT of the FEL line-that the only one that can be Tee'd.
Clear as mud?
Kenny, thanks for responding and the schematic, forgot to say that earlier. So one error I made was thinking the fluid flow was from block to FEL through the PB line. The fluid flows through the FEL from the IN line to the block and "helps" the 3 pt. the line I have running to the motor contains only an on/off valve for the fluid to run through and no 3rd exit for taking the PB back to the block. The fluid out of the motor I have tee'd to the OUT line from the FEL. Could I tee into the PB line with the motor supply? Then put another on/off valve in the PB line between the tee and the block. I realize I would lose 3pt function when that valve is closed and flow is diverting to the motor. Then function restored when the motor supply is valved closed and the PB is valved back open. Is there any "harm" to the 3pt if flow is stopped through that PB line?
DonDC-- I'll try to post some pics tomorrow.
DonDC-- I'll try to post some pics tomorrow.
Don, the main problem with using the valves to redirect the PB flow thru the Sabre valve could be flow or GPM, do you know what it and your tractor is rated for? If not what size are the line and ports/fittings?
Say your machine is rated at 10gpm, but the valve is on,y rated for 5gpm, then you run the reall risk of overheating your fluid from the restriction.
Also, remember your dealing with serious pressure here, upwards of 3000psi in some cases so be sure to use valves and fittings rated for that and not one from the plumbing isle at Home Cheapot that are only rated for 150psi or so.
Pics would be great....
Say your machine is rated at 10gpm, but the valve is on,y rated for 5gpm, then you run the reall risk of overheating your fluid from the restriction.
Also, remember your dealing with serious pressure here, upwards of 3000psi in some cases so be sure to use valves and fittings rated for that and not one from the plumbing isle at Home Cheapot that are only rated for 150psi or so.
Pics would be great....
Kenny, I hope to have some pics up later today.
All components are high pressure. The tractor puts out 7+GPM @2200+psi. All lines and ports are 1/2" and the valves are rated at 4000psi, if I remember correctly.
My concern is if I cut flow of the PB to the 3PH and redirect it to the cutter supply does that harm the 3PH or anything back there. As I said before, I understand cutting that flow would disable it from use while using the cutter. I just wanted to be sure I'm not harming the 3PH or over heating anything there.
All components are high pressure. The tractor puts out 7+GPM @2200+psi. All lines and ports are 1/2" and the valves are rated at 4000psi, if I remember correctly.
My concern is if I cut flow of the PB to the 3PH and redirect it to the cutter supply does that harm the 3PH or anything back there. As I said before, I understand cutting that flow would disable it from use while using the cutter. I just wanted to be sure I'm not harming the 3PH or over heating anything there.
I'm hoping the pic is attached. Looking down from above, the hose coming up toward the camera is the feed line to the motor. The yellow handle is the shut off valve on that line above where it is tee'd into the PB line. Just below and right of the yellow handle is the return line from the motor tee'd into the OUT line of the FEL.
Attachments
Looking from the side, the upper left connection is the supply line to the motor tee'd into the PB. The connection on the right is the return line from the motor tee'd into the OUT of the FEL. Currently this setup is not working because the flow of the PB is being divided between the motor and the 3PH. I want to put another valve to the right of the tee in the PB to cut that flow off and open the valve in the motor supply line when using the cutter. Then close the cutter valve and open the PB valve when doing 3PH operations.
As you may be able to see, the cutter hoses have quick connections for removal when not needed.
As you may be able to see, the cutter hoses have quick connections for removal when not needed.
Attachments
Red, it looks like you have it figured out. No worries about blocking off the flow to the block/rockshaft-that should not be a problem. Might want to get a IR type temp gun and monitor the new valve to make sure nothing is overheating, about 100* or so above ambient temperature should be considered normal.
You will probably have to run the engine at about 1500rpm or so to get the flow down below 4gpm, otherwise the cutter will most likely operate to fast.
You will probably have to run the engine at about 1500rpm or so to get the flow down below 4gpm, otherwise the cutter will most likely operate to fast.
Thanks for the info Kenny. I'll let you know how it goes once we get the other valve on or if there are any other issues.
Cool, thanks!
Take some pics of the business end of that cutter as well, I and I am sure other would like to see it in action!
Take some pics of the business end of that cutter as well, I and I am sure other would like to see it in action!