| Item | Part No. | Part Name | Qty | Serial No. |
| 20Y-70-00053 | BOOM ASS'Y | 57469- | ||
| 1 | \6\ | BOOM | 57469- | |
| 2 | 205-70-65762 | BUSHING | 45001- | |
| 3 | 07145-00090 | SEAL,DUST | 45001- | |
| 4 | 07145-00090 | SEAL,DUST | 45001- | |
| 5 | 206-70-51190 | PIN | 45001- | |
| 6 | 20Y-70-11390 | SPACER¤ 0.8MM | 46404- | |
| 7 | 20Y-70-11370 | SPACER¤ 1.5MM | 46404- | |
| 8 | 20Y-70-11170 | PLATE | 45001- | |
| 9 | 20Y-70-11380 | BOLT | 45007- | |
| 10 | 01580-12016 | NUT | 45001- | |
| 11 | 205-70-65680 | PIN | 45001- | |
| 12 | 20Y-70-11360 | SPACER¤ 0.8MM | 45001- | |
| 13 | 205-70-71310 | PLATE | 45001- | |
| 14 | 01010-51235 | BOLT | 45001- | |
| 15 | 01643-31232 | WASHER | 45001- | |
| 16 | 20Y-70-11180 | PIN | 45001- | |
| 17 | 20Y-70-11340 | SPACER¤ 0.8MM | 45001- | |
| 18 | 205-70-51530 | SPACER¤ 1.5MM | 45001- | |
| 19 | 205-70-66580 | PLATE | 45001- | |
| 20 | 01010-51235 | BOLT | 45001- | |
| 21 | 01643-31232 | WASHER | 45001- |