| Item | Part No. | Part Name | Qty | Serial No. |
| (723-28-16101) | VALVE ASS'Y | 59659- | ||
| (723-28-16100) | VALVE ASS'Y | 58001-59658 | ||
| (723-28-13102) | VALVE ASS'Y | 55328-58000 | ||
| (723-28-13101) | VALVE ASS'Y | 54770-55327 | ||
| (723-28-13100) | VALVE ASS'Y | 52374-54769 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1664-21A0 TO Y1664-28A0. | ||||
| 723-26-00802 | BLOCK SUB ASS'Y | 58001- | ||
| 723-26-00801 | BLOCK SUB ASS'Y | 52374-58000 | ||
| 1 | 723-26-11210 | BLOCK | 52374- | |
| 2 | 201-62-72610 | POPPET | 52374- | |
| 3 | 195-40-31140 | SPRING | 52374- | |
| 4 | 700-22-11311 | SPRING | 52374- | |
| 5 | 723-26-15390 | PLUG | 52374- | |
| 6 | 07002-13334 | O-RING | 52374- | |
| 723-20-85100 | PLUG ASS'Y | 52374- | ||
| 7 | \6\ | PLUG | 52374- | |
| 8 | \6\ | SCREW | 52374- | |
| 9 | 07002-11023 | O-RING | 52374- | |
| 10 | 07000-11004 | O-RING | 52374- | |
| 11 | 07001-01004 | RING | 52374- | |
| 12 | 07000-12020 | O-RING | 52374- | |
| 13 | 07000-12120 | O-RING | 58001- | |
| 13 | 07000-02120 | O-RING | 52374-58000 | |
| 14 | 07000-12010 | O-RING | 52374- |