Komatsu PC500LC-10R Shop Manual page 245

10 STRUCTURE AND FUNCTION
OPERATION OF SHUTTLE VALVE IN PRESSURE COMPENSATION VALVE OF
CONTROL VALVE
When holding pressure in port (A) exceeds LS pressure in spring chamber (B)
1: Main pump
2: Valve
3: Shuttle valve
1.
Shuttle valve (3) is pressed to the right by port (A) pressure and disconnects port (A) and port (C).
2.
The holding pressure in port (A) is sent to spring chamber (B) and presses piston (4) to the left so that pis-
ton (4) and valve (2) do not separate from each other.
INTRODUCTION OF LS PRESSURE IN CONTROL VALVE
LS
Abbreviation for Load Sensing
PC500LC-10R
COMPONENT PARTS OF HYDRAULIC SYSTEM
4: Piston
5: Pressure compensation valve
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