17 Construction Series 51-SY5000/7000/9000 Series SY 2-position single Symbol 2-position single 2-position double Symbol 2-position double 3-position closed center/exhaust center/pressure center Symbol 3-position closed center 3-position exhaust center 3-position pressure center (This figure shows a closed center type.) Component Parts t q u y w r e t q u y wr t q u y wr Caution Mounting screw tightening torques M3: 0.8 N・m M4: 1.4 N・m No. 2 3 4 5 1 Description Resin Resin Resin Aluminum, HNBR Material Aluminum die-casted Note White White (51-SY9000: Gray) White . . Adapter plate Body End plate Piston Spool valve assembly Replacement Parts . Thread type No. 6 7 . Description Sub-plate Gasket Round head combination screw Note Aluminum die-casted HNBR For valve mounting (Flat nickel plated) Part no. 51-SY540 51-SY740 51-SY940 1 (P) 4 (A) 2 (B) 3 (EB) 5 (EA) 1 (P) 4 (A) 2 (B) 3 (EB) 5 (EA) 1 (P) 4 (A) 2 (B) 3 (EB) 5 (EA) SY7000-11-11 M4 x 31 1/4: SY7000-27-1 3/8: SY7000-27-2 . . SY5000-11-15 M3 x 26 SY5000-27-1 . SY9000-11-2 SY9000-18-2 (M3 x 42) 3/8: SY9000-27-1 1/2: SY9000-27-2 . .