| Item | Part No. | Part Name | Qty | Serial No. |
| 21K-70-00590 | BOOM ASS'Y | 10380- | ||
| 1 | \6\ | BOOM | 10380- | |
| 2 | 20Y-70-11651 | SEAT (WELDED) | 10001- | |
| 3 | 21K-62-74211 | BRACKET (WELDED) | 10001- | |
| 4 | 21K-62-74221 | BRACKET (WELDED) | 10001- | |
| 5 | 21K-62-74231 | BRACKET (WELDED) | 10001- | |
| 6 | 203-70-51221 | SEAT (WELDED) | 10001- | |
| 7 | 21K-62-74280 | BRACKET (WELDED) | 10001- | |
| 8 | 21K-70-71311 | BUSHING | 10065- | |
| 9 | 07145-00080 | SEAL | 10001- |