| Item | Part No. | Part Name | Qty | Serial No. |
| 421-70-A2200 | ASSEMBLY, BOOM | A31001-UP- | ||
| 1 | (NSS) | BOOM, LIFT | A31001-UP- | |
| 2 | 421-70-21240 | BUSHING | A31001-UP- | |
| 3 | 421-70-11381 | BUSHING | A31001-UP- | |
| 4 | 421-70-11261 | BUSHING | A31001-UP- | |
| 5 | 421-09-11310 | SEAL, DUST | A31001-UP- | |
| 6 | 421-09-11320 | SEAL, DUST | A31001-UP- | |
| 7 | 07020-00000 | FITTING, GREASE | A31001-UP- | |
| 421-70-00120 | ASSEMBLY, BELLCRANK | A31001-UP- | ||
| 8 | (NSS) | BELLCRANK | A31001-UP- | |
| 9 | 421-70-11272 | BUSHING | A31001-UP- | |
| 10 | 421-09-11330 | SEAL, DUST | A31001-UP- | |
| 421-70-00082 | ASSEMBLY, LINK | A31001-UP- | ||
| 11 | 421-70-A1120 | LINK | A31001-UP- | |
| 12 | 421-70-11251 | BUSHING | A31001-UP- | |
| F1 - FOR MACHINES WITH JRB, 2 OR 3-SPOOL ATTACHMENT, ORDER P/N 421-70-A2220AND MODIFY THIS ACCORDING TO THE P/N 421-879-A170 JRB BOOM REWORK DRAWING. CALL TAC FOR DRAWING. | ||||