| Item | Part No. | Part Name | Qty | Serial No. |
| 23B-40-41103 | Orbitrol Steering Control Assembly | 55001- | ||
| 23B-40-41102 | Orbitrol Valve Assembly | 55001-55936 | ||
| 1 | Control Parts Assembly | 55001- | ||
| 2 | ST230327 | Spring | 55001- | |
| 3 | ST15 | Pin | 55001- | |
| 4 | ST7970 | Plate | 55001- | |
| 5 | ST5126 | Drive | 55001- | |
| 6 | STBA0291C-003 | Gerotor | 55001- | |
| 7 | ST6901S-9 | Spacer | 55001- | |
| 8 | ST8438S-1 | Cap, End | 55001- | |
| 9 | O-ring, (Kit : K08) | 55001- | ||
| 10 | O-ring, (Kit : K08) | 55001- | ||
| 11 | ST5389-1 | Screw | 55001- | |
| 12 | ST5389R-001 | Screw | 55001- | |
| 13 | STBA0097A | Ball | 55001- | |
| 14 | STBA0096A | Screw | 55001- | |
| 14 | ST64009 | Bearing | 55001- | |
| 15 | ST8329 | Race | 55001- | |
| 16 | ST5544 | Bearing | 55001- | |
| 17 | Seal, Oil, (Kit : K08) | 55001-55936 | ||
| 18 | O-ring, (Kit : K08) | 55001- | ||
| 19 | ST8703 | Bushing | 55001- | |
| 20 | ST14317 | Ring | 55001- | |
| 21 | Seal, Dust, (Kit : K08) | 55001- | ||
| 22 | Valve Subassembly | 55001- | ||
| 23 | ST21785 | Retainer | 55001- | |
| 24 | ST230313 | Spring | 55001- | |
| 25 | ST18015 | Ball | 55001- | |
| 26 | Seat | 55001- | ||
| 27 | Ball | 55001- | ||
| 28 | Holder | 55001- | ||
| 29 | Spring | 55001- | ||
| 30 | Plug | 55001- | ||
| 31 | O-ring | 55001- |