Adjusting the loader pressure relief on a 4720

[sweetjeep]

Hey everyone.

Today's dumb question is:

If I wanted to adjust the relief valve of the hydraulics for my 4720 how would I do it? (i.e, is it a standard relief valve? and where is it located?)

The reason is twofold, 1) Every once in a while, I need a little more oomph when log splitting. and 2) The tractor is SIGNIFICANTLY larger than my old 4310, but it doesn't appear to pick up nearly the load that the little guy could.

The 4310 would routinely shock me with it's ability to pick up trees and loads of "whatever", yet with the same bucket/forks, the 4720 seems to be straining to move the same load.

I am curious if the valve is set wrong, as I have heard is not entirely uncommon.

Does anyone know the correct screw turns out setting?

Thanks!

[4720 OWNER]

Assuming you mean upping the pressure to do more worK? I would think you would have to check everything else down stream to make sure it could handle it (frame, loader arms,etc), talk to the dealer, did not see this in my owners manual. Seems like when the loader is at its max, then so am i.

Did see the adjustment for how fast the hydraulics work. To find it get in tractor and sit down. Look between your feet and below the air adjustment for the seat. It is right there and covered in the owners manual.

1000 kg is not enough?

[kennyd]

You need to make up a pressure gauge and take a reading before you do anything...The relief valve I believe is under the seat on the tranny somewhere BUT you MUST have a gauge BEFORE you mess with it!

You can get a 0-3000psi gauge from TSC or the SurplusCenter, a short hose, and a coupler that will plug into one of your FEL ports to get the reading. (see attached picture) Once you have the gauge made up I can help you further.

[jd4310man]

I believe that each valve has its own pressure relief and there could be different opperating pressure depending on the setting of any valve on the tractor. Like kennyd said, in order to adjust the relief valve you need to use a pressure gauge. If you are having trouble with your log splitter, take a reading of the hydraulic valve on your splitter. I think the common working pressure is around 2500 psi. most hoses and components have a limit of 5000 psi bursting pressure that should not be exceded.

[sweetjeep]

Originally Posted by kennyd

You need to make up a pressure gauge and take a reading before you do anything...The relief valve I believe is under the seat on the tranny somewhere BUT you MUST have a gauge BEFORE you mess with it!

You can get a 0-3000psi gauge from TSC or the SurplusCenter, a short hose, and a coupler that will plug into one of your FEL ports to get the reading. (see attached picture) Once you have the gauge made up I can help you further.

If anyone is still reading this.

This (above) is what I had in mind. Thanks. My cheater thought was simply to check the regulator and try and determine if it was roughly set correctly.

KennyD: Unless I am seriously mistaken, I have a feeling I am not getting anywhere near the rated weight out of the loader. Therefore, my conclusion is that I am not getting the correct pressure.

[kennyd]

Originally Posted by sweetjeep

If anyone is still reading this.

This (above) is what I had in mind. Thanks. My cheater thought was simply to check the regulator and try and determine if it was roughly set correctly.

KennyD: Unless I am seriously mistaken, I have a feeling I am not getting anywhere near the rated weight out of the loader. Therefore, my conclusion is that I am not getting the correct pressure.

Well, get a gauge setup and we will see what you get