| Item | Part No. | Part Name | Qty | Serial No. |
| (723-28-50800) | CONTROL VALVE | 6501- | ||
| (723-28-50400) | CONTROL VALVE | 4001-6500 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1664-31A0 TO Y1664-55A0. | ||||
| 723-21-05500 | VALVE SUB ASS'Y | 6501- | ||
| 723-21-04500 | VALVE SUB ASS'Y | 4001-6500 | ||
| 1 | \6\ | BLOCK,VALVE | 6501- | |
| 1 | \6\ | BLOCK,VALVE | 4001-6500 | |
| 2 | 07000-12120 | O-RING | 4001- | |
| 3 | 07000-12020 | O-RING | 4001- | |
| 4 | 723-26-15830 | O-RING | 4001- | |
| 5 | 723-26-15840 | O-RING | 4001- | |
| 6 | 07000-11008 | O-RING | 4001- | |
| 7 | 702-21-54260 | O-RING | 4001- | |
| 8 | \6\ | SPOOL | 4001- | |
| 9 | \6\ | PLUG | 4001- | |
| 10 | \6\ | O-RING | 4001- | |
| 11 | 723-26-15121 | RETAINER | 4001- | |
| 12 | 709-26-11450 | SPRING | 4001- |