| Item | Part No. | Part Name | Qty | Serial No. |
| 17A-57-21112 | OPERATOR'S SEAT A. | B20287- | ||
| \0\17A-57-21110 | OPERATOR'S SEAT A. | B20001-B20286 | ||
| 1 | (17A-57-21122) | SEAT ASS'Y | B20287- | |
| \0\17A-57-21120 | SEAT ASS'Y | B20001-B20286 | ||
| 2 | (17A-57-21132) | TURN TABLE ASS'Y | B20287- | |
| \0\17A-57-21130 | TURN TABLE ASS'Y | B20001-B20286 | ||
| 3 | 17A-57-21170 | HEAD REST | B20001- | |
| 4 | 01010-81030 | BOLT | B20001- | |
| 5 | 01643-31032 | WASHER | B20001- | |
| 6 | 17A-57-11231 | COVER | B20001- | |
| 7 | 17A-57-11221 | SEAL | B20001- | |
| 8 | 01010-81230 | BOLT | B20001- | |
| 9 | 01643-31232 | WASHER | B20001- |