6. MAIN CONTROL VALVE 6. MAIN CONTROL VALVE STRUCTURE STRUCTURE (1/3) В Type : Closed center, Load pressure - Independent - Flow - Distribution 1) a3 b3 a2 b2 a1 b1 S1 S2 Hydraulic circuit 76096WE10 6-21 A3 B3 LS pst A2 B2 A1 B1 P T b A3 B3 LS pst A2 B2 A1 B1 P T a2 T P a1 A1 B1 a3 LS A2 B2 pst A3 B3 Dump Floating Down t Up Boom Aux Roll back Bucke b1 b A2 B2 2 b3 Port Port name Port size P From main pump SAE 1" T To hydraulic tank SAE 1 1/4" A1, B1 To bucket cylinder port SAE 3/4" A2, B2 To boom cylinder port SAE 3/4" a1, b1 Bucket pilot port 11/16-16UN a2, b2 Boom pilot port 11/16-16UN a3, b3 Auxiliary pilot port 11/16-16UN LS Load sensing port 9/16-18UNF Pst To RCV P port 9/16-18UNF