Komatsu PC20R-8 Shop Manual page 60

. The position where piston (3) stops, in other words,
the pump absorption torque, is determined by the
position where the force of spring (1) + pump pres-
sure P acting on piston (3) are in balance.
P
. In other words, if pump discharge pressure P
creases, pump discharge amount Q is reduced;
and if pump discharge pressure P
pump discharge amount Q is increased.
10-42
in-
P
goes down,
P
PC20R-8 PC27R-8