| Item | Part No. | Part Name | Qty | Serial No. |
| 20U-973-0012 | BOOM ASS'Y,1ST | 12805- | ||
| 20U-973-0011 | BOOM ASS'Y,1ST | 12800-12804 | ||
| 20U-973-0010 | BOOM ASS'Y,1ST | 10835-12799 | ||
| 1 | \6\ | BOOM,1ST | 12805- | |
| 1 | \6\ | BOOM,1ST | 12803-12804 | |
| 1 | \6\ | BOOM,1ST | 10835-12802 | |
| 2 | 20T-70-81140 | BUSHING | 12800- | |
| 2 | 20T-70-71140 | BUSHING | 10835-12799 | |
| 3 | 07020-00675 | FITTING,GREASE | 10835- | |
| 4 | 09453-00002 | STOPPER | 10835- | |
| 5 | 01580-11210 | NUT | 10835- | |
| 6 | 20U-70-21720 | COVER | 12803- | |
| 7 | 01011-81010 | BOLT | 12803- | |
| 8 | 01010-81090 | BOLT | 12803- | |
| 9 | 01643-31032 | WASHER | 12803- | |
| 10 | 07145-00050 | SEAL,DUST | 10835- | |
| 20U-973-0021 | BOOM ASS'Y,2ND | 12800- | ||
| 20U-973-0020 | BOOM ASS'Y,2ND | 10835-12799 | ||
| 11 | \6\ | BOOM,2ND | 12800- | |
| 11 | \6\ | BOOM,2ND | 10835-12799 | |
| 12 | 20U-70-21491 | BUSHING | 12800- | |
| 12 | 20U-70-21490 | BUSHING | 10835-12799 | |
| 13 | 07020-00000 | FITTING,GREASE | 10835- | |
| 14 | 07145-00070 | SEAL,DUST | 10835- | |
| 15 | 20U-973-2391 | BRACKET,3RD | 12762- | |
| 15 | 20U-973-2390 | BRACKET,3RD | 10835-12761 | |
| 16 | 07020-00000 | FITTING,GREASE | 10835- | |
| 20U-70-00321 | LINK ASS'Y,SUB | 12800- | ||
| 20U-70-00320 | LINK ASS'Y,SUB | 10835-12799 | ||
| 17 | \6\ | LINK,SUB | 16682- | |
| 17 | \6\ | LINK,SUB | 10835-16681 | |
| 18 | 21W-70-31130 | BUSHING | 12800- | |
| 18 | 07144-10503 | BUSHING | 10835-12799 | |
| 19 | 07145-00050 | SEAL,DUST | 10835- | |
| 20 | 07020-00900 | FITTING,GREASE | 10835- | |
| 21 | 07049-01012 | PLUG | 12762- |