3-Point Hitch No Hydraulics at 3 PT or Remotes

[s219]

Try not to overthink this (no reason to -- just follow instructions). In most systems with a PB loop, the order needs to be:

pump --> loader --> remotes (or backhoe) --> 3-pt

The 3-pt is setup to dump back to the reservoir and needs to be last in line. If you had no loader or remotes, the PB loop would simply connect the pump to the 3-pt. That is usually how tractors ship from the factory. When adding a loader and/or remotes, you need to think of these optional features being "inserted" into the existing PB loop between the pump and 3-pt.

So visualize how it would have to be hooked up without any loader valve. Don't change that basic function, just insert the loader valve into the loop before the 3-pt. That should change how you view the loader valve.

 

[K5lwq]

What I am calling the tank line is the return line.

The valve that will fail is your new loader valve. The tank port is not designed to have high pressure. As long as you never use the 3pt or remote to lift a load or do any real work it probably will last a while. But, if you do, you will be putting high pressure where it does not belong, on the return line.

If you did not have a loader, you would turn the slot on your hydraulic valve as described in the diagram you posted. Then flow would be directed directly to your remote and 3pt.

Hopefully someone that can explain it better to you will respond before any damage is done. Sorry I can not explain it better.

 

[K5lwq]

Try not to overthink this (no reason to -- just follow instructions). In most systems with a PB loop, the order needs to be:

pump --> loader --> remotes (or backhoe) --> 3-pt

The 3-pt is setup to dump back to the reservoir and needs to be last in line. If you had no loader or remotes, the PB loop would simply connect the pump to the 3-pt. That is usually how tractors ship from the factory. When adding a loader and/or remotes, you need to think of these optional features being "inserted" into the existing PB loop between the pump and 3-pt.

So visualize how it would have to be hooked up without any loader valve. Don't change that basic function, just insert the loader valve into the loop before the 3-pt. That should change how you view the loader valve.

Thank you! Apparently I am not doing a good job explaining.

 

[ritcheyvs]

The loader valve has seven ports. One is the high pressure inlet port, fed from the hydraulic pump, and one is pressure beyond that feeds the remotes and three-point at the back end. The loader valve is "open center" which means the high pressure flow passes directly from the pressure inlet to the power beyond ports when the joy stick is centered. Four of the ports are the up/down feeds for the lift and curl cylinders on the loader. Finally, there is a no-pressure tank or outlet port that returns fluid to the reservoir from the retract side side of the loader cylinders when pressure extends the other side.

You need to find the the appropriate Prince diagram for your valve (like this) to determine which port is which.

By the way, don't obsess too much over which port goes where for the four lines to the cylinders. If you get it wrong you can swap quick couplers until it's right.

 

[oldnslo]

This is what the FEL valve instructions read:

PB would be used if a valve is to be added downstream.

I have no valve downstream. Still can't figure out why it was hooked up on the old valve?

JBain,
You DO have a valve down stream it is the 3PH control. PTSG provided the correct connection diagram on post 16 for connecting the FEL control to the hydraulic block on your Kioti.

 

[jbain]

The loader valve has seven ports. One is the high pressure inlet port, fed from the hydraulic pump, and one is pressure beyond that feeds the remotes and three-point at the back end. The loader valve is "open center" which means the high pressure flow passes directly from the pressure inlet to the power beyond ports when the joy stick is centered. Four of the ports are the up/down feeds for the lift and curl cylinders on the loader. Finally, there is a no-pressure tank or outlet port that returns fluid to the reservoir from the retract side side of the loader cylinders when pressure extends the other side.

You need to find the the appropriate Prince diagram for your valve (like this) to determine which port is which.

By the way, don't obsess too much over which port goes where for the four lines to the cylinders. If you get it wrong you can swap quick couplers until it's right.

I figured it out the connections to the hydraulic block were incorrect. See attachment View attachment 591352. The PB attaches to the tank port (B) and the FEL out attaches to what we were calling the PB port (on the side). There is an attachment up in this post that shows the mix up. The hydraulic block on this tractor is different as it has that spool valve.

That all said, if the PB plug is capped (NOT installed) the FEL valve operates just like any other hydraulic valve with a supply and return. If the tractor has another path to supply hydraulics to the 3 PT and remotes it will not need the PB. See attachment showing how this would be done. View attachment 591368

I appreciate all the help on this as it brought greater understanding of how hydraulics work on these tractors. Thanks all!

 

[oldnslo]

glad that you have it working.