| Item | Part No. | Part Name | Qty | Serial No. |
| 421-40-22111 | WHEEL ASSEMBLY | H50051-. | ||
| 1 | 421-40-22120 | WHEEL | H50051-. | |
| 2 | 421-40-22140 | KNOB ASSEMBLY | H50051-. | |
| 3 | 421-40-22150 | BUSHING | H50051-. | |
| 4 | 421-40-22160 | PIN | H50051-. | |
| 5 | 421-40-22170 | CONTACT ASSEMBLY | H50051-. | |
| 6 | 421-40-22180 | PAD | H50051-. | |
| 7 | 421-40-22210 | SPRING LOCK | H50051-. | |
| 8 | 362-43-15210 | NUT | H50051-. | |
| 9 | 362-43-15220 | WASHER | H50051-. |