| Item | Part No. | Part Name | Qty | Serial No. |
| (723-48-20102) | VALVE ASS'Y | 21290- | ||
| (723-48-20101) | VALVE ASS'Y | 20805-21289 | ||
| (723-48-20100) | VALVE ASS'Y | 20001-20804 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1664-01A0 TO Y1664-21A0. | ||||
| 723-40-87100 | VALVE ASS'Y | 20001- | ||
| 1 | \6\ | BODY | 20001- | |
| 2 | \6\ | SPOOL | 20001- | |
| 3 | 723-40-87160 | SPRING | 20001- | |
| 4 | \6\ | SLEEVE | 20001- | |
| 5 | \6\ | SEAL | 20001- | |
| 6 | \6\ | CASE | 20001- | |
| 7 | 723-40-87150 | RETAINER | 20001- | |
| 8 | 723-40-87170 | O-RING | 20001- | |
| 9 | 07000-13035 | O-RING | 20001- | |
| 10 | 07000-11007 | O-RING | 20001- | |
| 11 | \6\ | SCREW | 20001- | |
| 12 | 01252-60830 | BOLT | 20001- | |
| 13 | 01252-61075 | BOLT | 20001- |