| Item | Part No. | Part Name | Qty | Serial No. |
| 421-40-22110 | WHEEL ASSEMBLY | H60051- | ||
| 1 | 421-40-22120 | WHEEL | H60051- | |
| 2 | 421-40-22140 | KNOB ASSEMBLY | H60051- | |
| 3 | 421-40-22150 | BUSHING | H60051- | |
| 4 | 421-40-22160 | PIN, SPRING | H60051- | |
| 5 | 421-40-22170 | CONTACT ASSEMBLY | H60051- | |
| 6 | 421-40-22180 | PAD, HORN | H60051- | |
| 7 | 421-40-22210 | SPRING LOCK | H60051- | |
| 8 | 362-43-15210 | NUT, SPRING | H60051- | |
| 9 | 362-43-15220 | WASHER | H60051- |