| Item | Part No. | Part Name | Qty | Serial No. |
| 451-631 | CONTROL VALVE | 4001- | ||
| THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1664-01A0 T0 Y1664-09A0. | ||||
| 1 | 453-693 | O-RING | 4001- | |
| 2 | 453-603 | O-RING | 4001- | |
| 3 | 453-715 | O-RING | 4001- | |
| 4 | 453-527 | O-RING | 4001- | |
| 5 | 453-519 | O-RING | 4001- | |
| 6 | 453-711 | O-RING | 4001- | |
| 7 | 450-996 | RING | 4001- | |
| 8 | 456-682 | BOLT | 4001- | |
| 9 | 455-221 | WASHER | 4001- | |
| 10 | 105-272 | BOLT | 4001- | |
| 11 | SPOOL | 4001- | ||
| 12 | SPOOL | 4001- | ||
| 13 | SPOOL | 4001- | ||
| 14 | SPOOL | 4001- | ||
| 15 | SPOOL | 4001- | ||
| 16 | SPOOL | 4001- | ||
| 17 | SPOOL | 4001- | ||
| 18 | SPOOL | 4001- |