Using old Fisher valve body to control FEL plow...

[Buckgnarly]

So got to thinking, I have an old underhood Fisher valvebody from an old Speedcast (conventional) plow setup along with cables and controls. I want to use it to control the angle function for my yet to be fabbed FEL plow, but need some input from those who know tractor hydro systems better.

Where can I pickup a high pressure line and a low pressure return on my tractor with no rear remotes and FEL? Is possible to tee off the tractor or the vavle body for the FEL?

 

[J_J]

Do you have any other valves other than the 3pt, or do you have a hyd block?

 

[Buckgnarly]

Do you have any other valves other than the 3pt, or do you have a hyd block?

Just the FEL and the 3PT, nothing else done to it.

I'm thinking if I can tap into a line, I can use it to angle the plow and still have full FEL control. I still have to talk to Fisher, but as I understand they were open center, but not sure on the PSI that they can handle.

I am still kicking around the idea of mounting it to the tractor itself to give me a 3rd function up by the FEL as opposed to mounting it to the plow frame, thoughts?

 

[J_J]

If your FEL valve has a PB port, otherwise 7 hoses from the FEL , you can add the valve in series if the the Fisher valve is an o pen center valve.

In a series hyd setup, the first valve will have priority on the flow.

If the FEL is using all the flow the other valve will have none.

If the FEL is not using all the flow, then the second or third valve can use the remainder of the flow.

Hyd valves are normally used intermittently except for hyd motors.

Is the Fisher valve lever type or solenoid?

 

[wdchyd]

If you use the valve in series in the out-flow from the power beyond on the FEL keep in mind those fisher plow pumps only put out 4-5 gpm (small spools)....if you add that valve it may cause undue back pressure on your main pump and cause damage if the flow is restricted even if you are not doing any work.....you'd need to check the pressure at your pump outlet line before and after the installation of that fisher plow valve to compare

the fisher pressure reliefs were only set at 1700 psi but the valve body can withstand upwards to 2500 psi

using a tee in your pump outlet line will not work, the pressure will find the path of least resistance and return through the opposing valve to tank

the oem fisher control valve has a built-in cross-over relief valve in case you hit something with the plow (normally set around 3000psi)

 

[Buckgnarly]

If your FEL valve has a PB port, otherwise 7 hoses from the FEL , you can add the valve in series if the the Fisher valve is an o pen center valve.

In a series hyd setup, the first valve will have priority on the flow.

If the FEL is using all the flow the other valve will have none.

If the FEL is not using all the flow, then the second or third valve can use the remainder of the flow.

Hyd valves are normally used intermittently except for hyd motors.

Is the Fisher valve lever type or solenoid?

Lever type, actually cable but same idea, no electric solenoid....though I do have a electric setup from a Milemarker winch I have to look at.
Might also present the same problem wdchyd mentioned though, did not think of the restricted flow and heat/stress buildup.

 

[J_J]

So got to thinking, I have an old underhood Fisher valvebody from an old Speedcast (conventional) plow setup along with cables and controls. I want to use it to control the angle function for my yet to be fabbed FEL plow, but need some input from those who know tractor hydro systems better.

Where can I pickup a high pressure line and a low pressure return on my tractor with no rear remotes and FEL? Is possible to tee off the tractor or the vavle body for the FEL?

I thought of something you might can do, and that is to split the hyd flow using a divider valve.

Say your tractor pump output was 10 GPM, and you installed a a 2/8 GPM splitter, the plow circuit would get 2 GPM and the rest of the attachments would get the 8 GPM.

So now, the 2 GPM would feed the plow valve and the return or OUT port would be plumbed to tank.

The plow valve could be manual or solenoid.

Both circuits would be independent and you can adjust the relief pressure on the plow circuit.

2/30 GPM PRINCE PRIORITY FLOW DIVIDER W/RELIEF

This divider valve is a 2/30 GPM, meaning that the priority flow gets 2 GPM and the rest goes to the FEL and other valves.

The 2 GPM is already set to relieve at 1500 psi.

The 30 GPM side means up to 30 GPM, but your tractor flow, other than the 2 GPM will flow through that port.

 

[Buckgnarly]

I thought of something you might can do, and that is to split the hyd flow using a divider valve.

Say your tractor pump output was 10 GPM, and you installed a a 2/8 GPM splitter, the plow circuit would get 2 GPM and the rest of the attachments would get the 8 GPM.

So now, the 2 GPM would feed the plow valve and the return or OUT port would be plumbed to tank.

The plow valve could be manual or solenoid.

Both circuits would be independent and you can adjust the relief pressure on the plow circuit.

That would make my FEL slower, yes? Any links to a diverter valve? Do the come split like that, i.e. 2/8? My flow is 12gpm according to Kioti.

 

[J_J]

Yes it would be slight slower.

The 30 GPM side will only pass what is available, and in your case would be 10 GPM.

The FEL and all other valves would operate at 10 GPM, and that is if you are running the engine at max rpm.

If you used a diverter valve, you are using the FEL curl circuit to feed fluid to another valve which you would have to set the relief and control the flow using the lever on the FEL valve, and run another return hose to tank.

 

[CsaUpstateNY]

I went through the same thought process with my old Furguson then decided to mount the fisher pump to the tractor engine thereby eliminating all risk (water from old plow cylinders) to my existing hydraulics.



Also I tried mounting the plow to a front end loader trick but the torque of the plow way out front limited the side force the tractor was able to exert. The closer to the front wheels you are able to get the plow the better.