| MAIN VALVE (8-SPOOL) |
| (THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS. Y1664-01A0 TO Y1664-09A0) |
| BLOCK GROUP |
| BLOCK |
| O-RING |
| O-RING |
| O-RING |
| O-RING |
| SLEEVE |
| PISTON |
| PISTON |
| SPRING |
| CASE |
| CASE |
| O-RING |
| SEAL |
| BOLT |
| PLUG |
| O-RING |
| COVER GROUP |
| COVER |
| PLUG |
| O-RING |
| RING |
| O-RING |
| PLUG |
| O-RING |
| RING, BACK-UP |
| O-RING |
| RING |
| PLUG |
| O-RING |
| UNION |
| O-RING |
| O-RING |
| STUD |
| WASHER |
| NUT |
| BOLT |