| Item | Part No. | Part Name | Qty | Serial No. |
| 20T-70-00310 | BOOM ASS'Y | 8501- | ||
| 1 | \6\ | BOOM | 8501- | |
| 2 | 20T-70-25720 | BUSHING | 8501- | |
| 3 | 07145-00050 | SEAL,DUST | 8501- | |
| G-1 | (\8\20T-70-X1200) | BOOM PIN GROUP | 8501- | |
| ==================== | ||||
| 4 | 20T-70-25650 | PIN | 8501- | |
| 5 | 07020-00000 | FITTING,GREASE | 8501- | |
| 6 | 201-70-23140 | SPACER¤ 1.0MM | 8501- | |
| 7 | 20R-70-11250 | PLATE | 8501- | |
| 8 | 01010-51225 | BOLT | 8501- | |
| 9 | 01643-31232 | WASHER | 8501- | |
| 10 | 20T-70-31540 | PIN | 8501- | |
| 11 | 07020-00000 | FITTING,GREASE | 8501- | |
| 12 | 201-70-23140 | SPACER¤ 1.0MM | 8501- | |
| 13 | 01010-51635 | BOLT | 8501- | |
| 14 | 01643-31645 | WASHER | 8501- | |
| 15 | 20T-70-31520 | PIN | 8501- | |
| 16 | 07020-00000 | FITTING,GREASE | 8501- | |
| 17 | 20T-70-19130 | SPACER¤ 1.0MM | 8501- | |
| 18 | 01010-51635 | BOLT | 8501- | |
| 19 | 01643-31645 | WASHER | 8501- | |
| ==================== |