| Item | Part No. | Part Name | Qty | Serial No. |
| 20Y-70-00560 | BOOM ASS'Y | 30980-31346 | ||
| 1 | \6\ | BOOM | 30980-@ | |
| 2 | 20Y-62-24252 | BRACKET (WELDED) | 30980-@ | |
| 3 | 20Y-62-24262 | SEAT (WELDED) | 30980-@ | |
| 4 | 20Y-62-24271 | BRACKET (WELDED) | 30980-@ | |
| 5 | 20Y-62-24360 | BRACKET (WELDED) | 30980-@ | |
| 6 | 20Y-62-24281 | BRACKET (WELDED) | 30980-@ | |
| 7 | 20Y-62-24291 | BRACKET (WELDED) | 30980-@ | |
| 8 | 20Y-70-21640 | BUSHING | 30980-@ | |
| 9 | 07145-00090 | SEAL | 30980-@ |