Komatsu Galeo BR380JG-1E0 Shop Manual page 133

10 Structure, function and maintenance standard
LS bypass valve
1. Hydraulic pump
2. Main spool
3. Pressure compensation valve
4. LS shuttle valve
5. LS bypass valve
6. LS circuit
Function
Releases the residual pressure in LS pressure
q
circuit (6) from orifices (a) and (b).
Slows down the rising rate of LS pressure to
q
prevent a sudden change of hydraulic pres-
sure.
Bypass flow from LS bypass valve (5) causes
q
a pressure loss to be generated due to the cir-
cuit resistance between throttle (c) of main
spool (2) and LS shuttle valve (4).
Effective LS differential pressure drops to
q
improve a dynamic stability of the actuator.
BR380JG-1E0
SEN01352-00
1
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