JD pressure relieve valve

[york]

Hi all

I have a JD 5045 and the book does not show how to set the PRV up higher-use this tractor to pull small log trailer with picker,thanks Albert

 

[J_J]

In general, a relief valve is set by turning a screw, or adding shims.

To raise pressure, a thicker shim is required, and if screw type, tighten the screw more will increase pressure relief.

You should know the max pump pressure and valve rated pressure.

Have a hyd test set available, and plug in to one of the QD's, and push the lever to pressurize the QD/gage momentarily.

Some people adjust the pressure to about 50 to 100 psi below the pumps max pressure.

This increase in pressure may allow you to lift a greater load, and you might need some more ballast on the back.

 

[york]

Thanks J_J

My problem is,i can`t find the PRV,they got it hit somewhere and i need to bump it up higher than the PRV on the log trailer...

 

[Tx Jim]

I was only able to locate 1 PRV(parts key #30) in the parts catalog and it appears to be non-adjustable.