| Item | Part No. | Part Name | Qty | Serial No. |
| (723-56-16401) | CONTROL VALVE | 20136- | ||
| (723-56-16400) | CONTROL VALVE | 20001-20135 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1660-31A0 TO Y1660-56A0. | ||||
| 1 | 723-40-92303 | VALVE ASS'Y,RELIEF | 20001- | |
| 2 | 700-22-11410 | O-RING | 20001- | |
| 3 | 700-80-64220 | RING | 20001- | |
| 4 | 07002-12434 | O-RING | 20001- |