| Item | Part No. | Part Name | Qty | Serial No. |
| (20K-57-31161) | SEAT ASSEMBLY | H55051- | ||
| 1 | 20K-57-33430 | LEVER CONTROL ASSEMBLY | H55051- | |
| 2 | 20K-57-31730 | NUT | H55051- | |
| 3 | 20K-57-32690 | BOLT | H55051- | |
| 4 | 20K-57-32710 | COVER | H55051- | |
| 5 | 20K-57-32720 | SCREW | H55051- | |
| 6 | 20K-57-32730 | BAND | H55051- | |
| 7 | 20K-57-32740 | WASHER | H55051- | |
| 8 | 20K-57-32750 | WASHER | H55051- | |
| 9 | 20K-57-31540 | BUMPER | H55051- | |
| 11 | 20K-57-32770 | HOUSING | H55051- | |
| 12 | 20K-57-32780 | CABLE | H55051- | |
| 13 | 20K-57-32790 | CABLE | H55051- | |
| 14 | 20K-57-32210 | SCREW | H55051- | |
| 15 | 20K-57-32810 | OPERATION | H55051- | |
| 16 | 20K-57-32820 | HANDLE | H55051- | |
| 17 | 20K-57-32830 | TUBE | H55051- | |
| 19 | 20K-57-32850 | SCREW | H55051- | |
| 20 | 20K-57-32860 | BEARING | H55051- | |
| 21 | 20K-57-32870 | SCREW | H55051- | |
| 22 | 20K-57-32880 | ROLLER | H55051- | |
| 23 | 20K-57-32890 | SCREW | H55051- | |
| 24 | 20K-57-32910 | WASHER | H55051- | |
| 25 | 20K-57-32920 | BELLOWS | H55051- | |
| 26 | 20K-57-32930 | BELLOWS | H55051- | |
| 27 | 20K-57-33530 | AIR SPRING ASSEMBLY | H55051- | |
| 28 | 20K-57-32950 | PLATE | H55051- | |
| 29 | 20K-57-32960 | BRACKET | H55051- | |
| 30 | 20K-57-32970 | SCREW | H55051- | |
| 31 | 20K-57-33460 | COMPRESSOR | H55051- | |
| 32 | 20K-57-32990 | BAND | H55051- | |
| 33 | 20K-57-33110 | NIPPLE | H55051- | |
| 34 | 20K-57-33470 | CABLE | H55051- | |
| 35 | 20K-57-33480 | AIR HOSE KIT | H55051- | |
| 36 | 20K-57-33140 | CLAMP | H55051- | |
| 37 | 20K-57-33150 | COVER | H55051- | |
| 38 | 20K-57-33160 | RIVET | H55051- | |
| 39 | 20K-57-33490 | BOLT | H55051- | |
| 40 | 20K-57-33180 | SHOCK ABSORBER | H55051- | |
| 41 | 20K-57-33190 | SCREW | H55051- | |
| 42 | 20K-57-33210 | BUMPER | H55051- | |
| 43 | 20K-57-33220 | RIVET | H55051- | |
| 44 | 20K-57-33230 | STOP | H55051- | |
| 45 | 20K-57-33240 | CLAMP | H55051- | |
| 46 | 20K-57-33510 | AIR HOSE KIT | H55051- | |
| 47 | 20K-57-33260 | BAND | H55051- | |
| 48 | 20K-57-33520 | CONTAINER | H55051- | |
| 49 | 20K-57-33280 | SUSPENSION | H55051- | |
| 50 | 20K-57-33290 | ARM | H55051- | |
| 51 | 20K-57-33310 | SUSPENSION | H55051- | |
| KIT | 20K-57-33450 | WEARING PARTS | H55051- |
