Komatsu PC200-8M0 Shop Manual page 164

SEN06120-00
LS bypass plug
LS: Abbreviation for Load Sensing
1. Main pump
2. Main spool
3. Pressure compensation valve
4. LS shuttle valve
5. LS bypass plug
6. LS circuit
Function
This valve relieves the residual pressure in LS
q
pressure circuit (6) from orifices (a) and (b).
q Slows down the rising rate of LS pressure to
prevent a sudden change of hydraulic pres-
sure.
q Depending on the bypass flow from LS bypass
plug (5), pressure loss is generated due to the
circuit resistance from orifice (c) of main spool
(2) to LS shuttle valve (4).
q Effective LS differential pressure drops to
improve a dynamic stability of the actuator.
22
10-402
402 Hydraulic system, Part 2
Functions and operation by valve
PC200, 200LC, 220, 220LC-8M0