STRUCTURE, FUNCTION, & MAINTENANCE STANDARD CLSS CLSS OUTLINE OF CLSS STRUCTURE FEATURES The CLSS consists of a main pump (2 pumps), control valve, and actuators for the work equipment. The main pump body consists of the pump itself, the PC valve and LS valve. CLSS stands for Closed center Load Sensing System, and has the following features. 1) Fine control not influenced by load 2) Control enabling digging even with fine control 3) Ease of compound operation ensured by flow divider function using area of opening of spool during com- pound operations 4) Energy saving using variable pump control PC210/240-7K 10-91