Komatsu PC500LC-10R Shop Manual page 241

10 STRUCTURE AND FUNCTION
When load pressure is lower than that of other work equipment during com-
bined operation, or when compensated
1: Main pump
2: Valve
3: Shuttle valve
• The pressure compensation valve is closed by LS pressure in port (D), and the spool meter-in downstream
pressure at port (B) becomes equal to the maximum pressure in the other actuator.
• Since the spool meter-in upstream pressure at port (A) is the pump pressure, the spool meter-in differential
pressure "Upstream pressure (Port (A) pressure) - Downstream pressure (Port (B))" is the same in all the
spools in operation.
• The pump discharged volume is divided at the meter-in opening area ratio.
PC500LC-10R
COMPONENT PARTS OF HYDRAULIC SYSTEM
4: Piston
5: Spring
6. LS shuttle valve
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