| Item | Part No. | Part Name | Qty | Serial No. |
| 421-40-22110 | WHEEL ASS'Y | 50001- | ||
| 1 | 421-40-22120 | WHEEL | 50001- | |
| 2 | 421-40-22140 | KNOB ASS'Y | 50001- | |
| 3 | 421-40-22150 | BUSHING | 50001- | |
| 4 | 421-40-22160 | PIN,SPRING | 50001- | |
| 5 | 421-40-22170 | CONTACT ASS'Y | 50001- | |
| 6 | 421-40-22180 | PAD,HORN | 50001- | |
| 7 | 421-40-22210 | SPRING LOCK,SPRING | 50001- | |
| 8 | 01580-10806 | NUT | 50001- | |
| 9 | 01602-20825 | WASHER | 50001- |