| Item | Part No. | Part Name | Qty | Serial No. |
| 424-64-15610 | VALVE ASS'Y,(NC-D) | 53001- | ||
| 1 | 421-64-15610 | SCREW | 54001- | |
| 2 | ST5389R-001 | SCREW | 54001- | |
| 3 | 416-64-15130 | CAP,END | 53001- | |
| 4 | 421-64-15620 | GEROTOR | 53001- | |
| 5 | ST6901S-9 | SPACER | 53001- | |
| 6 | 416-64-15160 | PLATE,SPACER | 53001- | |
| 7 | 416-64-15170 | DRIVE | 53001- | |
| 8 | \6\ | CONTROL ASS'Y | 54001- | |
| 9 | 416-64-15190 | SPRING | 53001- | |
| 10 | 416-64-15410 | PIN | 53001- | |
| 11 | 425-64-21180 | O-RING,SET (KIT) | 54001- | |
| 12 | 425-64-21190 | ADAPTER | 54001- | |
| 13 | 425-64-21210 | BALL,CHECK | 54001- | |
| 14 | 416-64-15520 | O-RING (KIT) | 54001- | |
| 416-64-15480 | BEARING ASS'Y | 53001- | ||
| 15 | 416-64-15490 | RACE,BEARING | 53001- | |
| 16 | 416-64-15510 | NEEDLE | 53001- | |
| 17 | 416-64-15560 | O-RING (KIT) | 53001- | |
| 18 | 416-64-15550 | SEAL,DUST (KIT) | 53001- | |
| 19 | 416-64-15530 | RING | 53001- | |
| 20 | 416-64-15540 | BUSHING | 53001- | |
| 21 | 416-64-15590 | RING,BACK-UP | 53001- | |
| SERVICE KIT | ||||
| KIT | STBA0271A | SERVICE KIT,STEERING VALVE | 54001- |