Case 580 B secondary pressure relief valve

[JKSmith_76]

Hello All
I had a pressure relief valve catastrophically fail on the swing section of my 1974 580 B backhoe valve body and I am looking for a complete valve to screw in for replacement. Has anyone had anything similar happen and were you able to locate the valve. I can purchase the swing section from a salvage yard but would like to just get the valve by itself. Thanks for any help

 

[HarleyHappy]

Can I ask, how did it fail?

 

[clueless2]

I doubt you will find the valve only.
If it were mine I would replace the section. The relief pressure will most likely be set correctly in it.
Be aware that the 580B backhoe used control valves made by two different manufacturers.