| Item | Part No. | Part Name | Qty | Serial No. |
| 20D-70-00010 | BOOM ASS'Y | 2301- | ||
| 1 | \6\ | BOOM | 2301- | |
| 2 | 203-70-41411 | BUSHING | 1601- | |
| 3 | 07020-00675 | FITTING,GREASE | 1601- | |
| 4 | 07145-00070 | SEAL,DUST | 2301- | |
| 5 | 202-70-61160 | PIN | 2301- | |
| 6 | 205-70-66580 | PLATE | 1601- | |
| 7 | 01010-51230 | BOLT | 1601- | |
| 8 | 01643-31232 | WASHER | 1601- | |
| 9 | 203-70-34270 | SPACER¤ 0.5MM | 1601- | |
| 203-70-11210 | SPACER¤ 1.0MM | 1601- | ||
| 203-70-11220 | SPACER¤ 2.0MM | 1601- | ||
| 10 | 202-70-61180 | PIN | 2301- | |
| 11 | 21K-70-11410 | PLATE | 1601- | |
| 12 | 01019-11640 | BOLT | 1601- | |
| 13 | 01580-11613 | NUT | 1601- | |
| 14 | 203-70-41460 | SPACER¤ 1.0MM | 1601- | |
| 15 | 203-46-56260 | PIN | 2492- | |
| \0\203-70-41391 | PIN | 1601-2491 | ||
| 16 | 205-70-66580 | PLATE | 1601- | |
| 17 | 01010-51230 | BOLT | 1601- | |
| 18 | 01643-31232 | WASHER | 1601- | |
| 19 | 203-70-41460 | SPACER¤ 1.0MM | 1601- | |
| 203-70-41470 | SPACER¤ 2.0MM | 1601- | ||
| 20 | 202-70-61190 | PIN | 2301- | |
| 21 | 205-70-66580 | PLATE | 1601- | |
| 22 | 01010-51230 | BOLT | 1601- | |
| 23 | 01643-31232 | WASHER | 1601- | |
| 24 | 203-70-41460 | SPACER¤ 1.0MM | 2301- | |
| 25 | 07214-60610 | CONNECTOR | 1601- | |
| 26 | 07020-00675 | FITTING,GREASE | 1601- | |
| 27 | 202-70-11410 | TUBE | 1601- | |
| 28 | 202-70-61210 | PIN | 2301- | |
| 29 | 205-70-66580 | PLATE | 1601- | |
| 30 | 01010-51230 | BOLT | 1601- | |
| 31 | 01643-31232 | WASHER | 1601- | |
| 32 | 203-70-11210 | SPACER¤ 1.0MM | 1601- |