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.

 

[JeepHead]

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

PB from loader to P on the P40G
PB Sleeve in the N port of valve
N to the port on the hydraulic block where the loader BY had been.
T Port on the p40G to a tee on the tank vent.

 

[JeepHead]

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.

I would say that I am within that range. Thanks!

 

[RjCorazza]

I forget the actual temperature, but somewhere around 120 degrees F is sensed as too hot to touch.
I checked my transmission case with an infrared temp tool, and get around 180 when working the machine.

 

[dstig1]

The number I have consistently heard for too hot to touch is 130, not 120. As in you cannot hold your hand on a 130F surface without either getting a burn or just pulling away. Either way, even 120 is not going to be pleasant.