| Item | Part No. | Part Name | Qty | Serial No. |
| (723-28-11500) | VALVE ASS'Y | 20490- | ||
| (723-28-10500) | VALVE ASS'Y | 19001-20489 | ||
| (723-29-12502) | VALVE ASS'Y | 15001-19000 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1666-21A0 TO Y1666-28A0. | ||||
| 1 | 723-20-80100 | VALVE ASS'Y,SUCTION | 15001- | |
| 2 | 07002-12034 | O-RING | 15001- | |
| 3 | 723-20-61502 | VALVE ASS'Y,RELIEF | 15001- | |
| 4 | 700-22-11410 | O-RING | 15001- | |
| 5 | 700-80-64220 | RING | 15001- | |
| 6 | 07002-12434 | O-RING | 15001- |