| Item | Part No. | Part Name | Qty | Serial No. |
| 723-21-10101 | VALVE ASS'Y | 1003- | ||
| 723-21-10100 | VALVE ASS'Y | 1001-1002 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1661-01A0 TO Y1661-04A0. | ||||
| 1 | \6\ | BLOCK | 1001- | |
| 2 | \6\ | BLOCK,VALVE | 1001- | |
| 3 | 723-26-21720 | COVER | 1001- | |
| 4 | 07000-12120 | O-RING | 1001- | |
| 5 | 723-26-15830 | O-RING | 1001- | |
| 6 | 723-26-15840 | O-RING | 1001- | |
| 7 | 07000-12020 | O-RING | 1001- | |
| 8 | 07000-11008 | O-RING | 1001- | |
| 9 | 01010-81095 | BOLT | 1001- | |
| 10 | 01643-31032 | WASHER | 1001- |