4 Body Ported Series 51-SY5000/7000/9000 Series SY 2-position single Symbol 2-position single 2-position double Symbol 2-position double Symbol 3-position closed center/exhaust center/pressure center 3-position closed center 3-position exhaust center 3-position pressure center (This figure shows a closed center type.) Component Parts Replacement Parts Bracket Assembly Part No. Construction How to Change Port Block Assembly  51-SY5000 Caution Mounting screw tightening torques 51-SY 000 (M3): 0.6 N・m 51-SY9000 (M4): 1.4 N・m 57 (A) 4 (B) 2 (A) 4 (B) 2 No. 6 Description Part no. Refer to “How to Order Port Block Assembly” on page 5. Port block assembly . The 51-SY9000 has no bracket. . Refer to “How to Order Port Block Assembly” on page 5 for part number. 1 (P) 3 (EB) 5 (EA) 1 (P) 3 (EB) 5 (EA) 1 (P) (A) 4 (B) 2 3 (EB) 5 (EA) If using body ported type, both A and B port sizes can be changed by replacing the port block assembly mounted on the body. When changing this block assembly, the correct screw torque must be achieved to avoid possible air leakage. q e w y qr w r y t t wy qr t Mounting screw (Threaded type) Port block assembly (Cassette type) Port block assembly Fitting assembly 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 Description Bracket (for F2) Bracket (for F1) Part no. SX 000-16-2A (with mounting screw) 57 SX 000-16-1A (with mounting screw) 57