| Item | Part No. | Part Name | Qty | Serial No. |
| 20Y-57-B1110 | OPERATOR'S SEAT (SUSPENSION) | B20001-B20837 | ||
| 1 | GJ18000422 | HEADREST ASS'Y | B20001-B20837 | |
| 2 | GJ18030250 | HEADREST FOAM ASS'Y | B20001-B20837 | |
| 3 | GJ18030514 | HEADREST COVER ASS'Y | B20001-B20837 | |
| 4 | GJ18000420 | BACKREST ASS'Y | B20001-B20837 | |
| 5 | GJ18260394 | BACKREST FOAM ASS'Y | B20001-B20837 | |
| 6 | GJ18030512 | BACKREST COVER ASS'Y | B20001-B20837 | |
| 7 | GJ18000421 | SEATREST ASS'Y | B20001-B20837 | |
| 8 | GJ18030515 | SEATREST FOAM ASS'Y | B20001-B20837 | |
| 9 | GJ18030513 | SEATREST COVER ASS'Y | B20001-B20837 | |
| 10 | GJ18210033 | BACKREST SPRING ASS'Y | B20001-B20837 | |
| 11 | GJ18180415 | OPERATOR'S SEAT FINISHING ASS'Y | B20001-B20837 | |
| 12 | GJ18240070 | BACKREST FIXING ASS'Y | B20001-B20837 | |
| 13 | GJ19400160 | ARMREST R.H. ASS'Y | B20001-B20837 | |
| 14 | GJ19400159 | ARMREST L.H. ASS'Y | B20001-B20837 | |
| 15 | GJ18260019 | SEAT BELT ASS'Y | B20001-B20837 | |
| 16 | GJ19002209 | SUSPENSION ASS'Y | B20001-B20837 | |
| 17 | GJ18180537 | SUSPENSION LEVER ASS'Y | B20001-B20837 | |
| 18 | GJ18240075 | SLIDER BRACKET ASS'Y | B20001-B20837 |