| Item | Part No. | Part Name | Qty | Serial No. |
| 273-57-12000 | SEAT ASS'Y | 20003-20082 | ||
| 1 | 238-57-11110 | SEAT,CUSHION | 20003-20082 | |
| 2 | 238-57-11120 | SEAT,BACK | 20003-20082 | |
| 3 | 238-57-11130 | PLATE | 20003-20082 | |
| 4 | 01010-51025 | BOLT | 20003-20082 | |
| 5 | 01602-21030 | WASHER,SPRING | 20003-20082 | |
| 6 | 236-54-22331 | ADJUSTER ASS'Y | 20003-20082 | |
| 7 | 236-54-22351 | ADJUSTER ASS'Y | 20003-20082 | |
| 8 | 273-54-12240 | KNOB | 20003-20082 | |
| 9 | 273-54-12250 | SCREW | 20003-20082 | |
| 10 | 273-54-12230 | SPRING | 20003-20082 | |
| 11 | 01220-40816 | SCREW | 20003-20082 | |
| 12 | 01580-10806 | NUT | 20003-20082 | |
| 13 | 01602-20825 | WASHER,SPRING | 20003-20082 |