| 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. | ||||
| \6\ | BODY GROUP | 58001- | ||
| \6\ | BODY GROUP | 55328-58000 | ||
| \6\ | BODY GROUP | 52374-55327 | ||
| 1 | \6\ | BLOCK | 52374- | |
| 2 | \6\ | BLOCK | 52374- | |
| 3 | \6\ | BLOCK | 52374- | |
| 4 | \6\ | BLOCK | 52374- | |
| 5 | \6\ | BLOCK | 52374- | |
| 6 | \6\ | SPOOL | 55328- | |
| 6 | \6\ | SPOOL | 52374-55327 | |
| 7 | \6\ | SPOOL | 52374- | |
| 8 | \6\ | SPOOL | 52374- | |
| 9 | \6\ | SPOOL | 52374- | |
| 10 | \6\ | SPOOL | 52374- | |
| 11 | \6\ | PLUG | 52374- | |
| 12 | \6\ | VALVE | 52374- | |
| 13 | \6\ | PLUG | 52374- | |
| 14 | \6\ | VALVE | 52374- | |
| 15 | \6\ | SPRING | 52374- | |
| 16 | \6\ | O-RING | 52374- | |
| 17 | 723-26-15110 | CASE | 52374- | |
| 18 | 709-26-11450 | SPRING | 52374- | |
| 19 | 723-26-14210 | SPRING | 52374- | |
| 20 | 723-26-14122 | SPRING | 52374- | |
| 21 | 723-26-15120 | RETAINER | 52374- | |
| 22 | 575-41-17420 | O-RING | 52374- | |
| 23 | 01252-60630 | BOLT | 52374- | |
| 24 | 01641-20608 | WASHER | 52374- |