| Item | Part No. | Part Name | Qty | Serial No. |
| 206-70-K2391 | Arm Assembly | K50400- | ||
| 1 | 206-70-K8011 | Arm | K50400- | |
| 2 | 20Y-70-42E51 | Plate (Welded) | K50400- | |
| 3 | 20Y-970-3570 | Bracket (Welded) | K50400- | |
| 4 | 20J-70-12180 | Seat (Welded) | K50400- | |
| 5 | 206-62-K2740 | Bracket (Welded) | K50400- | |
| 6 | 20Y-62-K7290 | Seat (Welded) | K50400- | |
| 7 | 20Y-70-31272 | Bushing | K50400- | |
| 8 | 20Y-70-32410 | Bushing | K50400- | |
| 9 | 21K-70-12161 | Bushing | K50400- | |
| 10 | 07145-00090 | Seal | K50400- | |
| 11 | 20Y-70-23230 | Seal | K50400- | |
| 12 | 206-70-71340 | Pin | K50400- | |
| 13 | 206-70-K4570 | Plate | K50484- | |
| 20Y-62-K7650 | Plate | K50400-K50483 | ||
| 14 | 01010-81240 | Bolt | K50484- | |
| 01010-81230 | Bolt | K50400-K50483 | ||
| 15 | 01643-31232 | Washer | K50400- | |
| 16 | 20Y-70-31431 | Spacer , 1.0mm | K50400- | |
| 17 | 206-70-71350 | Pin | K50400- | |
| 18 | 206-70-66581 | Plate | K50564- | |
| 205-70-66580 | Plate | K50400-K50563 | ||
| 19 | 01010-81230 | Bolt | K50400- | |
| 20 | 01643-31232 | Washer | K50400- | |
| 21 | 20Y-70-31431 | Spacer , 1.0mm | K50400- | |
| 22 | 206-70-71451 | Spacer , 2.0mm | K50400- | |
| 23 | (707-01-X0520) | Cylinder Group | K50776- | |
| 707-E1-X0520 | Cylinder Group | K50776- | ||
| (707-01-XR920) | Cylinder Group | K50400-K50775 | ||
| 707-01-XJ920 | Cylinder Group | K50400-K50775 |