| Item | Part No. | Part Name | Qty | Serial No. |
| 21W-973-0112 | BOOM ASS'Y,1ST | 15001- | ||
| 1 | \6\ | BOOM,1ST | 15194- | |
| 1 | \6\ | BOOM,1ST | 15001-15193 | |
| 2 | 201-70-21182 | BUSHING | 15001- | |
| 3 | 07145-00060 | SEAL,DUST | 15001- | |
| 4 | 07020-00900 | FITTING,GREASE | 15001- | |
| 5 | 07145-00060 | SEAL,DUST | 15001- | |
| 21W-973-0121 | BOOM ASS'Y,2ND | 15001- | ||
| 6 | \6\ | BOOM,2ND | 15001- | |
| 7 | 21W-70-31170 | BUSHING | 15001- | |
| 8 | 07020-00675 | FITTING,GREASE | 15001- | |
| 9 | 07020-00000 | FITTING,GREASE | 15001- | |
| 10 | 07145-00100 | SEAL,DUST | 15001- | |
| 11 | 21W-70-21142 | BRACKET,3RD | 15001- | |
| 21W-70-00322 | LINK ASSY | 17157- | ||
| 21W-70-00321 | LINK ASS'Y,SUB | 15001-17156 | ||
| 12 | \6\ | LINK SUB | 17157- | |
| 12 | \6\ | LINK,SUB | 15001-17156 | |
| 13 | 07144-10503 | BUSHING | 15001- | |
| 14 | 07145-00050 | SEAL,DUST | 15001- | |
| 15 | 07020-00675 | FITTING,GREASE | 15001- |