Komatsu ecot3 PC300LC-8 Shop Manual page 151

10 Structure, function and maintenance standard
2. When compensated
(If the load pressure is lower than other work equipment during a combined operation)
Function
The pressure compensation valve closes
q
under LS pressure of port (D), and the spool
meter-in downstream pressure of port (B)
becomes equivalent to the maximum pressure
of other work equipment.
q Since the spool meter-in upstream pressure of
port (A) is the pump pressure, the spool meter-
in differential pressure [upstream pressure port
(A) pressure] - downstream pressure [port (B)
pressure] becomes equivalent to all the spools
in operation.
Pump flow is divided according to the ratio of
q
the meter-in opening area.
Operation
q Spring chamber (E) is interconnected to port
(D).
q Piston (4) and valve (2) operate in the closing
direction (to the right) under the LS circuit pres-
sure from other work equipment of port (F).
q Valve upstream pressure (= spool meter-in
downstream pressure) of port (B) is controlled
with LS pressure.
PC300, 350-8
SEN01994-01
25