| 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. | ||||
| 723-26-00901 | COVER SUB ASS'Y | 52374- | ||
| 1 | 723-26-11370 | COVER | 52374- | |
| 2 | 723-26-15170 | PLUG | 52374- | |
| 3 | 723-26-15190 | PLUG | 52374- | |
| 4 | 708-8E-16160 | PLUG | 52374- | |
| 5 | 706-73-71450 | PLUG | 52374- | |
| 6 | 07002-11423 | O-RING | 52374- | |
| 7 | 07002-11023 | O-RING | 52374- | |
| 8 | 07000-11007 | O-RING | 52374- | |
| 9 | 07001-01007 | RING,BACK-UP | 52374- | |
| 10 | 07000-11009 | O-RING | 52374- | |
| 11 | 07001-01009 | RING,BACK-UP | 52374- | |
| 12 | 723-26-15680 | STUD | 52374- | |
| 13 | 01580-11008 | NUT | 52374- | |
| 14 | 01643-31032 | WASHER | 52374- | |
| 709-20-52300 | VALVE ASS'Y,RELIEF | 52374- | ||
| 15 | \6\ | SLEEVE | 52374- | |
| 16 | \6\ | VALVE | 52374- | |
| 17 | \6\ | POPPET | 52374- | |
| 18 | \6\ | SPRING | 52374- | |
| 19 | \6\ | SCREW | 52374- | |
| 20 | \6\ | SPRING | 52374- | |
| 21 | \6\ | RING | 52374- | |
| 22 | \6\ | NUT | 52374- | |
| 23 | 700-22-11410 | O-RING | 52374- | |
| 24 | 700-80-64220 | RING | 52374- | |
| 25 | 07002-02434 | O-RING | 52374- | |
| 26 | \6\ | O-RING | 52374- |