How hot is too hot for hydraulics?

[JeepHead]

Right after I purchased my Kubota, I installed a two spool valve from Summit to control top/tilt. I have noticed that the valve always gets very hot, not hot enough to blister you but definitely very hot. I know some heat is normal under heavy use but when do you know there is an issue and need to investigate?

 

[ptsg]

Can you give us more details on how is this valve connected to the rest of the system?

 

[oldnslo]

Normal hydraulic oil temperature should be in the 140 - 180 degrees F depending on how hard you are working the hydraulics.

Recommended max oil temp is usually 220 - 230 F since hotter than that starts effecting seal materials.