| 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. | ||||
| 723-20-97201 | VALVE SUB ASS'Y | 4001- | ||
| 1 | \6\ | BLOCK | 4001- | |
| 2 | 723-11-13510 | PLUG | 4001- | |
| 3 | 07002-10823 | O-RING | 4001- | |
| 4 | \6\ | SPOOL | 4001- | |
| 5 | 723-11-13340 | SPRING | 4001- | |
| 6 | \6\ | PLUG | 4001- | |
| 7 | 722-12-19120 | O-RING | 4001- | |
| 8 | 07000-11006 | O-RING | 4001- | |
| 9 | 07000-11007 | O-RING | 4001- | |
| 10 | 723-11-13360 | FILTER | 4001- | |
| 11 | 723-11-13350 | SPACER | 4001- | |
| 12 | 723-11-27280 | PLUG | 4001- | |
| 13 | 07002-10823 | O-RING | 4001- |