| Item | Part No. | Part Name | Qty | Serial No. |
| 421-U12-3100 | PRE-CLEANER | 20001-26482 | ||
| 1 | \6\ | HOOD,PRECLEANER | 20001-@ | |
| 2 | 421-U12-3130 | BODY,PRECLEANER | 20001-26482 | |
| 3 | 421-U12-3140 | CLAMP | 20001-@ | |
| 4 | 421-U12-3150 | ROTOR | 20001-@ | |
| 5 | 421-U12-3160 | BOLT | 20001-@ | |
| 6 | 421-U12-3170 | RING,SNAP | 20001-@ | |
| 7 | 421-U12-3180 | BEARING,BALL | 20001-26482 | |
| 8 | 421-U12-3190 | BUSHING,SPACER | 20001-26482 | |
| 9 | 421-U12-3210 | WASHER | 20001-26482 | |
| 10 | 421-U12-3220 | WASHER | 20001-26482 | |
| 11 | 421-U12-3230 | NUT | 20001-@ | |
| 12 | 421-U12-3240 | BOLT | 20001-@ | |
| 13 | 421-U12-3250 | NUT | 20001-@ | |
| 14 | 421-U12-3260 | PLUG | 20001-@ |