| Item | Part No. | Part Name | Qty | Serial No. |
| 20Y-57-28200 | OPERATOR'S SEAT A. | K30001-K31999 | ||
| AS165697 | UPPER ASS'Y | K30001-K31999 | ||
| 1 | AS165698 | BACK COVER ASS'Y KIT,BACK | K30001-K31999 | |
| 2 | AS160167 | BACK FOAM KIT | K30001-K31999 | |
| 3 | AS165699 | SEAT COVER ASS'Y KIT | K30001-K31999 | |
| 4 | AS157154 | SEAT FOAM KIT | K30001-K31999 | |
| 5 | AS162045 | FRAME KIT | K30001-K31999 | |
| 6 | AS162032 | CABLE KIT,ADJUSTMENT | K30001-K31999 | |
| 7 | AS156713 | HI RISER SPRING KIT,HEIGHT RISER | K30001-K31999 | |
| 8 | AS157228 | DAMPER ASS'Y KIT | K30001-K31999 | |
| 9 | AS157230 | SUSPENSION ASS'Y | K30001-K31999 | |
| AS156738 | BEARING KIT,L.H. | K30001-K31999 | ||
| 10 | AS172646 | SLIDE RAIL KIT | K30001-K31999 | |
| 11 | AS156737 | WEIGHT ADJUSTER KIT | K30001-K31999 | |
| 12 | AS156717 | UP STOP/BUMP STOP K. | K30001-K31999 | |
| 13 | AS162036 | HANDLE KIT | K30001-K31999 | |
| 14 | AS164959 | LIFTER ASS'Y | K30001-K31999 | |
| 15 | AS162047 | COVER KIT,SUSPENSION | K30001-K31999 | |
| 16 | AS165700 | HEAD REST KIT | K30001-K31999 |