| Item | Part No. | Part Name | Qty | Serial No. |
| 425-64-21100 | VALVE ASS'Y | 50001-52018 | ||
| 1 | 421-64-15610 | SCREW | 50001-52018 | |
| 2 | 425-64-21110 | SCREW ASS'Y,RETAINER | 50001-52018 | |
| 3 | 416-64-15130 | CAP,END | 50001-52018 | |
| 4 | 421-64-15620 | GEROTOR | 50001-52018 | |
| 5 | 425-64-21120 | SPACER | 50001-52018 | |
| 6 | 416-64-15160 | PLATE,SPACER | 50001-52018 | |
| 7 | 416-64-15170 | DRIVE | 50001-52018 | |
| 8 | 425-64-21140 | CONTROL ASS'Y | 50001-52018 | |
| 9 | 416-64-15410 | PIN | 50001-52018 | |
| 10 | 416-64-15190 | SPRING | 50001-52018 | |
| 11 | 425-64-21150 | SPRING | 50001-52018 | |
| 416-64-15480 | BEARING ASS'Y | 50001-52018 | ||
| 12 | 416-64-15490 | RACE,BEARING | 50001-52018 | |
| 13 | 416-64-15510 | NEEDLE | 50001-52018 | |
| 14 | 416-64-15560 | O-RING (KIT) | 50001-52018 | |
| 15 | 425-64-21160 | SEAL (KIT) | 50001-52018 | |
| 16 | 416-64-15550 | SEAL,DUST (KIT) | 50001-52018 | |
| 17 | 416-64-15530 | RING | 50001-52018 | |
| 18 | 425-64-21170 | BUSHING | 50001-52018 | |
| 19 | 416-64-15520 | O-RING (KIT) | 50001-52018 | |
| 20 | 425-64-21180 | O-RING (KIT) | 50001-52018 | |
| 21 | 425-64-21190 | ADAPTER | 50001-52018 | |
| 22 | 425-64-21210 | BALL | 50001-52018 | |
| SERVICE KIT | ||||
| K | 425-64-21130 | SERVICE KIT,STEERING VALVE | 50001-52018 |