| Item | Part No. | Part Name | Qty | Serial No. |
| 237-40-11101 | WHEEL ASS'Y | 20028- | ||
| 1 | 237-40-11111 | WHEEL | 20028- | |
| 2 | 237-40-11120 | BUTTON | 20028- | |
| 3 | 237-40-11131 | LOCK | 20028- | |
| 4 | 237-40-11141 | CAP | 20028- | |
| 5 | 237-40-11151 | SPRING | 20028- | |
| 237-40-11200 | SHAFT ASS'Y | 20028- | ||
| 6 | 237-40-11210 | SHAFT | 20028- | |
| 7 | 237-40-11220 | BUSHING | 20028- | |
| 8 | 237-40-11230 | SHIM | 20028- | |
| 9 | 237-40-11240 | SHIM | 20028- | |
| 10 | 237-40-11250 | HOUSING | 20028- | |
| 11 | 237-40-11260 | SCREW | 20028- | |
| 12 | 237-40-11270 | RING | 20028- | |
| 13 | 237-40-11280 | RING | 20028- | |
| 14 | 237-40-11290 | BEARING | 20028- | |
| 15 | 01582-11411 | NUT | 20028- | |
| 16 | 01602-21442 | WASHER | 20028- | |
| 17 | 01640-21426 | WASHER | 20028- | |
| 18 | 01050-51040 | BOLT | 20028- | |
| 19 | 01602-21030 | WASHER | 20028- | |
| 20 | 238-40-12100 | STEERING VALVE ASS'Y | 20028- |