| Item | Part No. | Part Name | Qty | Serial No. |
| 20Y-70-00090 | BOOM ASS'Y | K20001-K20571 | ||
| 1 | \6\ | BOOM | K20001-K20571 | |
| 2 | 206-70-51260 | BUSHING | K20001-K20571 | |
| 3 | 07145-00090 | SEAL,DUST | K20001-K20571 | |
| 4 | 07020-00675 | FITTING,GREASE | K20001-K20571 | |
| 5 | 07145-00090 | SEAL,DUST | K20001-K20571 | |
| 6 | 206-70-51190 | PIN | K20001-K20571 | |
| 7 | 20Y-70-11390 | SPACER¤ 0.8MM | K20001-K20571 | |
| 8 | 20Y-70-11370 | SPACER¤ 1.5MM | K20001-K20571 | |
| 9 | 20Y-70-11170 | PLATE | K20001-K20571 | |
| 10 | 20Y-70-11380 | BOLT | K20001-K20571 | |
| 11 | 01580-12016 | NUT | K20001-K20571 | |
| 12 | 205-70-65680 | PIN | K20001-K20571 | |
| 13 | 20Y-70-11360 | SPACER¤ 0.8MM | K20001-K20571 | |
| 14 | 205-70-71310 | PLATE | K20001-K20571 | |
| 15 | 01010-51235 | BOLT | K20001-K20571 | |
| 16 | 01643-31232 | WASHER | K20001-K20571 | |
| 17 | 20Y-70-11180 | PIN | K20001-K20571 | |
| 18 | 20Y-70-11340 | SPACER¤ 0.8MM | K20001-K20571 | |
| 19 | 205-70-51530 | SPACER¤ 1.5MM | K20001-K20571 | |
| 20 | 205-70-66580 | PLATE | K20001-K20571 | |
| 21 | 01010-51235 | BOLT | K20001-K20571 | |
| 22 | 01643-31232 | WASHER | K20001-K20571 |