| Item | Part No. | Part Name | Qty | Serial No. |
| 20Y-57-K1120 | OPERATOR'S SEAT A. | | 20001- |
| 1 | 20Y-57-K1150 | FRAME ASS'Y | | 20001- |
| 2 | 20Y-57-K1160 | COVER ASS'Y,BACK | | 20001- |
| 3 | 20Y-57-K1170 | CUSHION,BACK | | 20001- |
| 4 | 20Y-57-K1180 | COVER ASS'Y,SEAT | | 20001- |
| 5 | 20Y-57-K1190 | CUSHION,SEAT | | 20001- |
| 6 | 20Y-57-K1210 | HANDLE | | 20001- |
| 7 | 20Y-57-K1220 | LIFTER ASS'Y | | 20001- |
| 8 | 20Y-57-K1230 | SPRING KIT,4 OF SPRINGS | | 20001- |
| 9 | 20Y-57-K1240 | LATCH ASS'Y | | 20001- |
| 10 | 20Y-57-K1250 | DAMPER ASS'Y,INCLUDE MOUNTING PARTS | | 20001- |
| 11 | 20Y-57-K1260 | ADJUSTER KIT,INCLUDE MOUNTING PARTS | | 20001- |
| 12 | 20Y-57-K1270 | STOPPER KIT,INCLUDE MOUNTING PARTS | | 20001- |
| 13 | 20Y-57-K1280 | SUSPENSION ASS'Y | | 20001- |
| 14 | 20Y-57-K1290 | SLIDE RAIL KIT | | 20001- |
| 15 | 20Y-57-K1320 | COVER KIT,SUSPENSION | | 20001- |
| 16 | 20Y-57-K1330 | REST,HEAD | | 20001- |
| 17 | 20Y-57-K1310 | BEARING KIT,(NOT SHOWN) | | 20001- |
| 18 | 01010-50816 | BOLT | | 20001- |
| 19 | 01641-20812 | WASHER | | 20001- |
| 20 | 20Y-57-K1111 | STAND | | 20001- |
| 21 | 01010-51230 | BOLT | | 20001- |
| 22 | 01643-31232 | WASHER | | 20001- |
