How to check and adjust the relief valve is easy.
There are two types of tractor relief valve.
The shim type and the adjustable screw type.
With the shim type, you can purchase a certain size shim to increase the pressure a certain amount. You might have to use several. There might be three or more shims in a kit with instructions. You also have to shut the tractor off to change the shims.
The adjustable relief valves can be adjusted with tractor on by turning the screw in to increase the pressure. A good quality hyd gage is essential.
Some people adjust the relief valves to about 50 psi below the pumps max pressure. You manual should tell you the tractor relief valve specs.
You should also know that before any attachments are installed, the main relief valve is the 3pt relief valve.
Loaders are add on attachments, and the loader valve has it's own relief valve.
Once installed, it usually becomes the main relief valve or the first relief valve after the pump. . So all relief valves should be set the same.
A 100 psi increase in the 2500 psi area, will increase the push force on one cyl to about 314 lbs, and times 2 cyls, = 628 lbs.
You can gain some lifting force by tilting the bucket up.
