| Item | Part No. | Part Name | Qty | Serial No. |
| 21K-70-00050 | BOOM ASS'Y | 1291- | ||
| 1 | \6\ | BOOM | 1291- | |
| 2 | 21K-70-11481 | BUSHING | 1291- | |
| 3 | 21K-70-11380 | SPACER | 1291- | |
| 4 | 07145-00080 | SEAL,DUST | 1291- | |
| 5 | 07020-00900 | FITTING,GREASE | 1291- | |
| 6 | 21K-70-11720 | PIN | 1291- | |
| 7 | 205-70-51450 | SPACER, 1.0MM | 1291- | |
| 8 | 205-70-65690 | PLATE | 1291- | |
| 9 | 01010-52040 | BOLT | 1291- | |
| 10 | 01643-32060 | WASHER | 1291- | |
| 11 | 21K-70-11390 | PIN | 1291- | |
| 12 | 21K-70-11410 | PLATE | 1291- | |
| 13 | 01019-11640 | BOLT | 1291- | |
| 14 | 01580-11613 | NUT | 1291- | |
| 15 | 21K-70-11251 | PIN | 1291- | |
| 16 | 205-70-51450 | SPACER, 1.0MM | 1291- | |
| 17 | 205-70-66580 | PLATE | 1291- | |
| 18 | 01010-51230 | BOLT | 1291- | |
| 19 | 01643-31232 | WASHER | 1291- | |
| 20 | 21K-70-11430 | PIN | 1291- | |
| 21 | 205-70-51450 | SPACER, 1.0MM | 1291- | |
| 22 | 205-70-65690 | PLATE | 1291- | |
| 23 | 01010-52040 | BOLT | 1291- | |
| 24 | 01643-32060 | WASHER | 1291- | |
| 25 | 21K-70-11170 | PIN | 1291- | |
| 26 | 203-70-11210 | SPACER, 1.0MM | 1291- | |
| 27 | 205-70-66580 | PLATE | 1291- | |
| 28 | 01010-51230 | BOLT | 1291- | |
| 29 | 01643-31232 | WASHER | 1291- |