Komatsu PC20R-8 Shop Manual page 82

6. Throttling LS introduction of pressure compensation valve
FUNCTION
. In the other actuator is relieved during compound operations, LS introduction throttle b of reducing valve (1) di-
vides the flow and sends more oil to the side receiving compensation.
OPERATION
Side receiving
compensation
W
A
P
PA
P
P
. If the other actuator (right side) is relieved during
compound operations, each circuit pressure (P
P ) of the other actuator becomes the same as
A
the pump circuit pressure (P
. In this case, spring chamber P
tuator (right side) becomes the same as pump cir-
cuit pressure P because of the balance of redu-
P
cing valve (1).
10-64
a
P
A
P
LS1
1
4
,
PA
=relief pressure).
P
of the other ac-
LS2
Side providing
compensation
W
P
LS
. P passes through LS introduction throttle b of
LS2
reducing valve (1) and becomes P
nected to the tank circuit from LS by-pass plug
(4), so pressure loss is generated at LS introduction
throttle b (the condition becomes P
. As a result, even if the other actuator is relieved, a
pressure differential is created between P
P , so more oil flows to actuator circuit A on this
LS
side (left side).
a
P
PA
P
b
P
LS2
1
RKP00414
. P is con-
LS LS
<P ).
LS LS2
P
PC20R-8 PC27R-8
A
and