| Item | Part No. | Part Name | Qty | Serial No. |
| 20E-57-41120 | SEAT, MECHANICAL SUSPENSION | H50051- | ||
| 1 | 20E-57-31390 | UPPER ASSEMBLY | H50051- | |
| 2 | 20E-57-31120 | BACK COVER | H50051- | |
| 3 | 20E-57-31130 | BACK FOAM | H50051- | |
| 4 | 20E-57-31140 | SEAT COVER | H50051- | |
| 5 | 20E-57-31150 | SEAT FOAM | H50051- | |
| 6 | 20E-57-31160 | FRAME | H50051- | |
| 7 | 20E-57-31170 | CABLE | H50051- | |
| 8 | 20E-57-31190 | CHANNEL, LHS | H50051- | |
| 9 | 20E-57-31210 | CHANNEL, RHS | H50051- | |
| 10 | 20E-57-31220 | MECHANISM COVER | H50051- | |
| 11 | 20E-57-31230 | ADJUSTMENT | H50051- | |
| 12 | 20E-57-31240 | KNOB | H50051- | |
| 13 | 20E-57-31410 | SUSPENSION | H50051- | |
| 14 | 20E-57-31260 | DAMPER | H50051- | |
| 15 | 20E-57-31270 | UPSTOP/BUMPSTOP | H50051- | |
| 16 | 20E-57-31280 | RIDE INDICATOR | H50051- | |
| 17 | 20E-57-31420 | WEIGHT ADJUSTMENT | H50051- | |
| 18 | 20E-57-31430 | SUSPENSION COVER | H50051- | |
| 19 | 20E-57-H0P01 | SEATBELT | H50051- | |
| 20 | 20E-57-31360 | ARMREST, LHS | H50051- | |
| 21 | 20E-57-31370 | ARMREST, RHS | H50051- | |
| 22 | 20E-57-31380 | HEADREST | H50051- |