| Item | Part No. | Part Name | Qty | Serial No. |
| 104-21-00011 | STEERING CASE ASS'Y | 53731- | ||
| 104-21-00010 | STEERING CASE ASS'Y | 45003-53730 | ||
| 1 | 104-21-21101 | CASE AND FRAME | 53731- | |
| 1 | 104-21-21100 | CASE AND FRAME | 45003-53730 | |
| 2 | 103-21-21181 | BOSS | 45003- | |
| 3 | 131-21-41520 | PLUG | 45003- | |
| 4 | 07049-01822 | PLUG | 45003- | |
| 5 | 07049-01012 | PLUG | 45003- | |
| 6 | 07043-01019 | PLUG | 45003- | |
| 7 | 07040-12414 | PLUG | 45003- | |
| 8 | 07044-12412 | PLUG | 45003- | |
| 9 | 07002-02434 | O-RING | 45003- | |
| 10 | 07040-13016 | PLUG | 45003- | |
| 11 | 07002-03034 | O-RING | 45003- | |
| 12 | 101-21-11170 | PLATE | 45003- | |
| 13 | 101-21-11160 | GASKET | 45003- | |
| 14 | 01010-31025 | BOLT | 45003- | |
| 15 | 01602-01030 | WASHER,SPRING | 45003- | |
| 16 | 01643-31032 | WASHER | 45003- | |
| 17 | 103-21-21212 | COVER | 45003- | |
| 18 | 103-21-21221 | GASKET | 45003- | |
| 19 | 01010-31025 | BOLT | 45003- | |
| 19A | 01010-51035 | BOLT | 53202- | |
| 19A | 01010-51025 | BOLT | 45003-53201 | |
| 19B | 103-21-21260 | BOSS | 53202- | |
| 20 | 01602-01030 | WASHER,SPRING | 45003- | |
| 21 | 103-21-21231 | GAUGE | 45003- | |
| 22 | 07002-02434 | O-RING | 45003- |