Komatsu PC500LC-10R Shop Manual page 264

COMPONENT PARTS OF HYDRAULIC SYSTEM
TRAVEL JUNCTION VALVE OF CONTROL VALVE
FUNCTION OF TRAVEL JUNCTION VALVE OF CONTROL VALVE
• When the travel lever is operated for straight travel, the travel junction valve does not receive pilot pressure
(PST) from the travel junction solenoid valve, and accordingly R.H. and L.H. travel circuits are connected,
and oil is supplied evenly to R.H. and L.H. travel motors to keep the straight travel performance.
• When the travel lever is operated for steering, the travel junction valve receives pilot pressure (PST) from
the travel junction solenoid valve, and accordingly R.H. and L.H. travel circuits are disconnected, and inde-
pendent oils are supplied individually to R.H. and L.H. travel motors to keep the steering performance.
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10 STRUCTURE AND FUNCTION
PC500LC-10R