| Item | Part No. | Part Name | Qty | Serial No. |
| 21U-70-31104 | BOOM ASS'Y,1ST | 30001- | ||
| 1 | 21U-70-31114 | BOOM,1ST | 30001- | |
| 2 | 20S-70-81140 | BUSHING | 30001- | |
| 3 | 07145-00045 | SEAL | 30001- | |
| 4 | 07020-00675 | FITTING | 30001- | |
| 5 | 21U-70-31160 | PIN | 30001- | |
| 6 | 21U-70-32410 | PLATE | 30001- | |
| 7 | 01010-81230 | BOLT | 30001- | |
| 8 | 01643-31232 | WASHER | 30001- | |
| 9 | 20P-70-81480 | SPACER | 30001- | |
| 10 | 21U-70-31190 | PIN | 30001- | |
| 11 | 21U-70-32410 | PLATE | 30001- | |
| 12 | 01010-81230 | BOLT | 30001- | |
| 13 | 01643-31232 | WASHER | 30001- | |
| 14 | 21U-70-11740 | SPACER¤ 1.0MM | 30001- | |
| 21U-70-30110 | PIN ASS'Y | 30001- | ||
| 15 | 21U-70-31181 | PIN | 30001- | |
| 16 | 07020-00000 | FITTING,GREASE | 30001- | |
| 17 | 04082-00212 | LOCK | 30001- | |
| 18 | 01010-81230 | BOLT | 30001- | |
| 19 | 01643-31232 | WASHER | 30001- | |
| 20 | 21U-70-11740 | SPACER¤ 1.0MM | 30001- | |
| 21 | 21U-70-31171 | PIN | 30001- | |
| 22 | 21U-70-32410 | PLATE | 30001- | |
| 23 | 01010-81230 | BOLT | 30001- | |
| 24 | 01643-31232 | WASHER | 30001- | |
| 25 | 21U-70-31260 | SPACER¤ 1.0MM | 30001- | |
| 26 | 21U-70-31270 | SPACER¤ 0.5MM | 30001- |