| Item | Part No. | Part Name | Qty | Serial No. |
| (723-29-18500) | VALVE ASS'Y | 20490- | ||
| (723-29-15500) | VALVE ASS'Y | 19001-20489 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1666-01A0 TO Y1666-08A0. | ||||
| 723-26-00700 | BLOCK SUB ASS'Y | 20490- | ||
| 723-26-04800 | BLOCK SUB ASS'Y | 19001-20489 | ||
| 1 | 723-26-11310 | BLOCK | 19001- | |
| 2 | 201-62-72610 | POPPET | 19001-20489 | |
| 3 | 195-40-31140 | SPRING | 19001-20489 | |
| 4 | 723-26-15390 | PLUG | 19001- | |
| 5 | 07002-13334 | O-RING | 19001- | |
| 6 | 07000-02120 | O-RING | 19001- | |
| 7 | 07000-12010 | O-RING | 19001- |