6. MAIN CONTROL VALVE 6. MAIN CONTROL VALVE STRUCTURE STRUCTURE (1/3) В Type :
Closed center, Load pressure - Independent - Flow - Distribution 1) B a3 b3 a2 b2 a1 b1 A Pst VIEW A VIEW B LS SX P Pst T Hydraulic circuit 74096WE10 6-23 SX S A3 B3 B2 A2 B1 A1 L T P a1 S a A1 B1 2 a3 A2B2 A3B3 ( ) ( ) )( ) ( Dump Rollback Floating wn Up Do b1 b2 b3 Port Port name Port size Por t Port name Port size P From main pump 1 5/16-12UN a3, b 3 Auxiliary pilot port 11/16-16UN T To hydraulic tank 1 5/16-12UN LS Load sensing port 9/16-18UNF A1, B1 To bucket cylinder po rt 1 5/16-12UN Pst To RCV P port 9/16-18UNF A2, B2 To boom cylinder por t 1 5/16-12UN SX To steering unit LS port 9/16-18UNF a1, b1 Bucket pilot port 11/16-16UN S To steering unit P port 7/8-14UNF a2, b2 Boom pilot port 11/16-16UN - - -