Clss; Structure Of Clss - Komatsu PC500LC-10R Shop Manual

10 STRUCTURE AND FUNCTION

CLSS

CLSS

Abbreviation for Closed-center Load Sensing System

STRUCTURE OF CLSS

• CLSS consists of main pump, control valves, and respective actuators.
• The main pump consists of a pump body, PC valve, and LS valve.
1.
Variable displacement piston pump
It is 2 pump type with front and rear, and controls the flow rate by changing the swash plate angle.
2.
Servo piston
Piston actuates in accordance with the inlet pressure to change the pump swash plate angle.
3.
Valve for control of swash plate angle
1)
PC valve (Power Constant)
It prevents the engine from stopping by the large load on the engine.
2)
LS Valve (Load Sensing)
It controls the pump flow rate in accordance with the travel of control lever.
PC500LC-10R
CLSS
10-77