| |1 | 21X-70-00100 | BOOM ASS'Y,1ST | |
| 1 | BOOM,1ST | ||
| 2 | 20T-70-41121 | BUSHING | |
| G-1 | 21X-70-X1110 | 1ST BOOM SEAL GROUP | |
| 3 | 07145-00050 | SEAL,DUST | |
| 4 | 07020-00675 | FITTING,GREASE | |
| 5 | 09453-00002 | STOPPER | |
| 6 | 01580-11210 | NUT | |
| G-2 | 21X-70-X1200 | BOOM PIN GROUP | |
| 7 | 21X-70-11240 | PIN | |
| 8 | 203-70-11210 | SPACER¤ 1.0MM | |
| |8 | 203-70-11220 | SPACER¤ 2.0MM | |
| |8 | 203-70-34270 | SPACER¤ 0.5MM | |
| 9 | 21X-70-11310 | PLATE | |
| 10 | 01010-51225 | BOLT | |
| 11 | 01643-31232 | WASHER | |
| 12 | 21X-70-11350 | PIN | |
| 13 | 20T-70-19130 | SPACER¤ 1.0MM | |
| 14 | 01010-51635 | BOLT | |
| 15 | 20T-70-41160 | SPACER | |
| 16 | 21X-70-11230 | PIN | |
| 17 | 21X-70-11340 | SPACER¤ 1.0MM | |
| 18 | 01010-51225 | BOLT | |
| 19 | 20S-70-31180 | SPACER | |
| 20 | 21X-70-11180 | PIN | |
| 21 | 201-70-23140 | SPACER¤ 1.0MM | |
| 22 | 07020-00000 | FITTING,GREASE | |
| 23 | 01010-51635 | BOLT | |
| 24 | 20T-70-41160 | SPACER | |
| G-3 | 21X-70-X1600 | CYLINDER COVER GROUP,BOOM | |
| 25 | 21X-70-11291 | BRACKET | |
| |25 | 21X-70-11290 | BRACKET | |
| 26 | 01010-50816 | BOLT | |
| 27 | 01643-30823 | WASHER | |
| 28 | 21X-70-11410 | PAD | |
| 29 | 21X-70-11420 | COLLAR | |
| 30 | 01010-50612 | BOLT | |
| 31 | 01643-30623 | WASHER | |
| 32 | 21X-70-11281 | COVER | |
| |32 | 21X-70-11280 | COVER | |
| 33 | 01010-51025 | BOLT | |
| 34 | 01643-31032 | WASHER | |
| 35 | 21X-63-02010 | CYLINDER ASS'Y,BOOM (SEE FIG.7051) |
