STRUCTURE, FUNCTION, & MAINTENANCE STANDARD CONTROL VALVE PC210-7K, PC210LC-7K, PC210NLC-7K 1. 6-spool valve 2. Cover 1 3. Cover 2 4. Pump merge-divider valve 5. Back pressure valve 6. Boom lock valve 7. Service valve OUTLINE This control valve consists of a 6-spool valve (unit type), 1 service valves, a pump merge-divider valve, a back pressure valve, and a boom hydraulic drift prevention valve. Since all the valves are assembled together with connecting bolts and their passes are connected to each other inside the assembly, the assembly is small in size and easy to maintain. Since one spool of this control valve is used for one work equipment unit, its structure is simple.
A1 :To bucket cylinder head A2 :To left travel motor A3 :To boom cylinder bottom A4 :To swing motor A5 :To right travel motor A6 :To arm cylinder head A-1 :To attachment B1 :To bucket cylinder bottom B2 :To left travel motor B3 :To bottom cylinder head B4 :To swing motor B5 :To right travel motor B6 :To arm cylinder bottom B-1 :To attachment P1 :From bucket PPC valve P2 :From bucket PPC valve P3 :From left travel PPC valve P4 :From left travel PPC valve P5 :From boom PPC valve P6 :From boom PPC valve P7 :From swing PPC valve P8 :From swing PPC valve P9 : From right travel PPC valve P10 : From right travel PPC valve P11 : From arm PPC valve P12 : From arm PPC valve P-1 :
From service PPC valve P-2 : From service PPC valve BP1: Boom RAISE PPC output pressure BP5: From attachment circuit selector solenoid valve PLS1:To rear pump control PLS2:To front pump control PP1 : From rear main pump PP2 : From front main pump PR : To solenoid valve, PPC valve, EPC valve PS : From pump merge-divider solenoid valve PST: From travel junction valve PX1: From 2-stage solenoid valve PX2: From 2-stage solenoid valve SA : Pressure sensor fitting port SB : Pressure sensor fitting port T : To tank TS : To tank TSW:To swing motor PC210/240-7K 10-53