Komatsu PC20R-8 Shop Manual page 55

. The force of the spring is adjusted so that
P ± P =DP =16 bar (16 kg/cm
P LS LS
where piston (6) is balanced.
. In other words, when the area of opening of control
valve is 1/2, the pump swash plate angle is also 1/2,
and when the area of opening of control valve is 1/4,
the pump swash plate angle is also 1/4. LS differen-
tial pressure DP is always held at 16 bar (16 kg/
LS
2
cm ), so the pump discharge amount is in accor-
dance with the area of opening of the control valve.
. For example, after balancing at an area of opening
1/4 of the control valve, if the system is operated to
3/4 of the area of opening of the control valve, LS
differential pressure DP
As a result, the LS valve is actuated and the pump
discharge amount is increased, but when the pump
swash plate angle rises to 3/4 the LS differential
pressure DP rises to 16 bar (16 kg /cm
LS
is balanced in this position.
PC20R-8 PC27R-8
2
) at the point
will drop momentarily.
LS
2
), so it
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