| Item | Part No. | Part Name | Qty | Serial No. |
| 20S-57-00100 | SEAT ASS'Y | 18001- | ||
| 1 | 20S-57-12110 | SEAT | 18001- | |
| 2 | 20T-57-23110 | CUSHION,BACK | 18001- | |
| 3 | 20T-57-12181 | LEVER | 18001- | |
| 4 | 203-57-21330 | SPACER | 18001- | |
| 5 | 01010-51020 | BOLT | 18001- | |
| 6 | 01602-21030 | WASHER,SPRING | 18001- | |
| 7 | 20T-57-23130 | BRACKET | 18001- | |
| 8 | 01010-51020 | BOLT | 18001- | |
| 9 | 01010-51050 | BOLT | 18001- | |
| 10 | 01602-21030 | WASHER,SPRING | 18001- | |
| 11 | 20T-57-23150 | SUPPORT | 18001- | |
| 12 | 20T-57-23120 | CUSHION | 18001- | |
| 13 | 01010-50835 | BOLT | 18001- | |
| 14 | 01602-30825 | WASHER,SPRING | 18001- | |
| 15 | 205-57-72590 | SEAL | 18001- | |
| 16 | 175-54-27350 | SPRING | 18001- | |
| 17 | 01010-51220 | BOLT | 18001- | |
| 18 | 01643-31232 | WASHER | 18001- | |
| 19 | 20T-57-23140 | BRACKET | 18001- | |
| 20 | 20T-57-23160 | SUPPORT | 18001- | |
| 21 | 20S-57-12310 | SUSPENSION ASS'Y | 18001- | |
| 22 | 09409-10000 | BELT | 18001- |