| Item | Part No. | Part Name | Qty | Serial No. |
| 20U-70-00201 | BOOM ASS'Y,SECOND | 1001- | ||
| 1 | \6\ | BOOM | 1001- | |
| 2 | 20U-70-11290 | BUSHING | 1001- | |
| 3 | 07020-00900 | FITTING,GREASE | 1001- | |
| 4 | 07145-00070 | SEAL,DUST | 1001- | |
| 5 | 20U-70-11280 | SHAFT | 1001- | |
| 6 | 203-70-34270 | SPACER, 0.5MM | 1001- | |
| 6 | 203-70-11210 | SPACER, 1.0MM | 1001- | |
| 6 | 203-70-11220 | SPACER, 2.0MM | 1001- | |
| 7 | 20U-70-11320 | PLATE | 1001- | |
| 8 | 01590-14246 | NUT | 1001- | |
| 9 | 04050-18075 | PIN,COTTER | 1001- | |
| 10 | 20U-70-11222 | PIN | 1897- | |
| 10 | (\4\20U-70-11221) | PIN | 1001-1896 | |
| (20U-70-11222,20T-70-41160) | ||||
| 11 | 201-70-23140 | SPACER, 1.0MM | 1001- | |
| 12 | 20U-70-11151 | PLATE | 1001- | |
| 13 | 20U-70-11370 | HOLDER | 1001- | |
| 14 | 01010-51230 | BOLT | 2304- | |
| 14 | 01010-51225 | BOLT | 1001-2303 | |
| 15 | 01643-31232 | WASHER | 1001- | |
| 16 | 01010-51635 | BOLT | 1001- | |
| 17 | 20T-70-41160 | SPACER | 1897- | |
| 17 | 01643-31645 | WASHER | 1001-1896 | |
| 20U-70-00601 | BOOM ASS'Y,THIRD | 3401- | ||
| 20U-70-00600 | BOOM ASS'Y,THIRD | 1001-3400 | ||
| 18 | \6\ | BOOM | 3401- | |
| 18 | \6\ | BOOM | 1001-3400 | |
| 19 | 20U-70-11310 | BUSHING | 1001- | |
| 20 | 07145-00070 | SEAL | 1001- | |
| 21 | 20U-70-11181 | SHAFT | 1001- | |
| 22 | 203-70-34270 | SPACER, 0.5MM | 1001- | |
| 22 | 203-70-11210 | SPACER, 1.0MM | 1001- | |
| 22 | 203-70-11220 | SPACER, 2.0MM | 1001- | |
| 23 | 20U-70-11320 | PLATE | 1001- | |
| 24 | 01590-14246 | NUT | 1001- | |
| 25 | 04050-18075 | PIN,COTTER | 1001- | |
| 20U-70-00302 | LINK ASS'Y | 3401- | ||
| 20U-70-00301 | LINK ASS'Y | 1001-3400 | ||
| 26 | \6\ | LINK | 3401- | |
| 26 | \6\ | LINK | 1001-3400 | |
| 27 | 07144-10304 | BUSHING | 1001- | |
| 28 | 07020-00675 | FITTING,GREASE | 1001- | |
| 29 | 07145-00035 | SEAL | 1001- | |
| 30 | 20U-70-11232 | SHAFT | 1897- | |
| 30 | (\4\20U-70-11231) | SHAFT | 1001-1896 | |
| (20U-70-11232,20S-70-31180) | ||||
| 31 | 20R-70-11270 | SPACER, 1.0MM | 1001- | |
| 32 | 01010-51230 | BOLT | 1001- | |
| 33 | 20S-70-31180 | SPACER | 1897- | |
| 33 | 01643-31232 | WASHER | 1001-1896 | |
| 34 | 20U-70-11242 | SHAFT | 1897- | |
| 34 | (\4\20U-70-11241) | SHAFT | 1001-1896 | |
| (20U-70-11242,20T-70-41160) | ||||
| 35 | 07020-00000 | FITTING,GREASE | 1001- | |
| 36 | 20T-70-19130 | SPACER, 1.0MM | 1001- | |
| 37 | 01010-51635 | BOLT | 1001- | |
| 38 | 20T-70-41160 | SPACER | 1897- | |
| 38 | 01643-31645 | WASHER | 1001-1896 | |
| 39 | 20T-70-41141 | PIN | 3401- | |
| 39 | 20U-70-11340 | SHAFT | 1001-3400 | |
| 40 | 07020-00000 | FITTING,GREASE | 1001-3400 | |
| 41 | 201-70-23140 | SPACER, 1.0MM | 1001- | |
| 42 | 20U-70-11350 | PLATE | 1001- | |
| 43 | 01010-51230 | BOLT | 1001- | |
| 44 | 01643-31232 | WASHER | 1001- |