Komatsu Galeo PC800-8 Shop Manual page 195

10 Structure, function and maintenance standard
1-2 Speed selector valve
Operation
1) At low speed (pilot pressure PI = 0)
• When pilot pressure PI from the control pump is
0, spool (1a) of travel speed selector valve (1) is
not switched.
In this condition, the oil from the chamber of
control piston (10) passes through spool (1a)
and is drained into the motor case. There is no
angle propulsion force acting on rocker cam
(14), so the low-speed surface is kept in a static
condition.
PC800, 850-8
SEN00384-02
33