| 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. | ||||
| 723-20-80100 | VALVE ASS'Y,SUCTION | 52374- | ||
| 1 | \6\ | SLEEVE | 52374- | |
| 2 | \6\ | VALVE | 52374- | |
| 3 | \6\ | SPRING | 52374- | |
| 4 | \6\ | SEAL | 52374- | |
| 5 | 07002-12034 | O-RING | 52374- | |
| 723-20-61101 | VALVE ASS'Y,RELIEF | 54770- | ||
| 723-20-61100 | VALVE ASS'Y,RELIEF | 52374-54769 | ||
| 6 | \6\ | SLEEVE | 52374- | |
| 7 | \6\ | PLUG | 54770- | |
| 7 | \6\ | PLUG | 52374-54769 | |
| 8 | \6\ | POPPET | 52374- | |
| 8A | \6\ | SEAT | 54770- | |
| 9 | \6\ | PISTON | 54770- | |
| 9 | \6\ | PISTON | 52374-54769 | |
| 10 | \6\ | POPPET | 54770- | |
| 10 | \6\ | POPPET | 52374-54769 | |
| 11 | \6\ | SPACER | 52374- | |
| 12 | \6\ | NUT | 52374- | |
| 13 | \6\ | NUT | 52374- | |
| 14 | 700-22-11410 | O-RING | 52374- | |
| 15 | 700-80-64220 | RING | 52374- | |
| 16 | 07002-12434 | O-RING | 54770- | |
| 16 | 07002-02434 | O-RING | 52374-54769 | |
| 17 | \6\ | O-RING | 54770- | |
| 17 | \6\ | O-RING | 52374-54769 | |
| 18 | \6\ | O-RING | 54770- | |
| 18 | \6\ | O-RING | 52374-54769 | |
| 19 | \6\ | SEAL | 52374- | |
| 20 | \6\ | SEAL | 52374- | |
| 21 | \6\ | SPRING | 54770- | |
| 21 | \6\ | SPRING | 52374-54769 | |
| 22 | \6\ | SPRING | 52374- |