| Item | Part No. | Part Name | Qty | Serial No. |
| (723-47-23600) | VALVE ASS'Y | B31800- | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1663-01A0 TO Y1663-21A0. | ||||
| 1 | 723-40-57200 | VALVE ASS'Y,UNLOADER | B31800- | |
| 2 | 07000-12014 | O-RING | B31800- | |
| 3 | 723-40-56350 | RING | B31800- | |
| 4 | 07000-12016 | O-RING | B31800- | |
| 5 | 723-60-22230 | RING | B31800- | |
| 6 | 07002-12434 | O-RING | B31800- |