Help with Komatsu Self Pressure Reducing Valve

So I am new to the forum but I like what I see so far. I am a relatively new to excavators (particularly Komatsu excavators) and I am hoping that I could get some information about the Self Pressure Reducing Valve.

My questions specifically pertain to the Komatsu PC 240LC-11.


Is the Self Pressure Reducing Valve specific to certain models?

What is the role of the Self Pressure Reducing Valve in the system?

What symptoms will an operator experience is the Self Pressure reducing valve fails?

Are there any schematics or service information that might help me diagnose a failed Self Pressure Reducing Valve?


Any help is greatly appreciated.

Thanks! - Komatsu "IKE"

Help with Komatsu Self Pressure Reducing Valve