| Item | Part No. | Part Name | Qty | Serial No. |
| (723-48-20102) | VALVE ASS'Y | 21290- | ||
| (723-48-20101) | VALVE ASS'Y | 20805-21289 | ||
| (723-48-20100) | VALVE ASS'Y | 20001-20804 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1664-01A0 TO Y1664-21A0. | ||||
| 723-40-91101 | VALVE ASS'Y,RELIEF | 20001- | ||
| 1 | \6\ | SLEEVE | 20001- | |
| 2 | \6\ | VALVE | 20001- | |
| 3 | \6\ | POPPET | 20001- | |
| 4 | \6\ | SPRING | 20001- | |
| 5 | \6\ | SEAT | 20001- | |
| 6 | \6\ | O-RING | 20001- | |
| 7 | \6\ | RING | 20001- | |
| 8 | \6\ | HOLDER | 20001- | |
| 9 | \6\ | RETAINER | 20001- | |
| 10 | \6\ | NUT | 20001- | |
| 11 | \6\ | HOLDER | 20001- | |
| 12 | \6\ | PLUG | 20001- | |
| 13 | \6\ | SPRING | 20001- | |
| 14 | \6\ | O-RING | 20001- | |
| 15 | \6\ | NUT | 20001- | |
| 16 | \6\ | SPRING | 20001- | |
| 17 | \6\ | RING | 20001- | |
| 18 | 700-22-11410 | O-RING | 20001- | |
| 19 | 700-80-64220 | RING | 20001- | |
| 20 | 07002-12434 | O-RING | 20001- |