Komatsu PC20R-8 Shop Manual page 79

3. LS by-pass plug
FUNCTION
. It releases the residual pressure of LS pressure P
. It makes the speed of the rise in pressure of LS pressure P
throttled flow, it creates a pressure loss in the throttled flow of the spool or shuttle valve, and increases the sta-
bility by lowering the effective LS differential pressure.
A
OPERATION
. The pressurized oil for LS circuit P
clearance filter a (formed by the clearance between
LS by-pass plug (1) and the valve body) through or-
ifice b and flows to the tank circuit T.
P =Pump circuit
P
P =LS circuit
LS
T =Tank circuit
A =To valves
B =To pump LS valve
PC20R-8 PC27R-8
.
LS
T
passes from
LS
more gentle. In addition, with this discharge
LS
P
LS
a
P
P
B
1
T b
RKP00750
10-61