| Item | Part No. | Part Name | Qty | Serial No. |
| 20D-57-00031 | OPERATOR'S SEAT A. | 1601-1603 | ||
| 20D-57-00041 | SEAT ASS'Y | 1601-@ | ||
| 1 | 205-57-72331 | CUSHION,BACK | 1601-@ | |
| 2 | 205-57-72411 | REST,HEAD | 1601-@ | |
| 3 | 20D-57-41120 | CUSHION | 1601-@ | |
| 4 | 20G-57-11210 | LEVER | 1601-@ | |
| 5 | 203-57-21330 | SPACER | 1601-@ | |
| 6 | 01010-51020 | BOLT | 1601-@ | |
| 7 | 01602-21030 | WASHER,SPRING | 1601-@ | |
| 8 | 20G-57-11100 | SUSPENSION ASS'Y | 1601-1603 | |
| 9 | 205-57-63520 | ADJUSTER | 1601-1603 | |
| 10 | 155-57-12310 | HANDLE ASS'Y | 1601-1603 | |
| 11 | 155-57-12320 | KNOB | 1601-1603 | |
| 12 | 155-57-12330 | DAMPER | 1601-1603 | |
| 13 | 01580-11210 | NUT | 1601-1603 | |
| 14 | 01602-21236 | WASHER,SPRING | 1601-1603 | |
| 15 | 01010-51020 | BOLT | 1601-@ | |
| 16 | 01602-21030 | WASHER,SPRING | 1601-@ | |
| 17 | 20D-57-41111 | BRACKET | 1601-@ | |
| 18 | 01580-11210 | NUT | 1601-@ | |
| 19 | 01643-31232 | WASHER | 1601-@ | |
| 20 | 01010-51230 | BOLT | 1601-@ | |
| 21 | 01643-31232 | WASHER | 1601-@ |