Model 4U harvesters of yams are suitable for potatoes, sweet potatoes, garlic and other root crops, it is composed of components such as cutting seedling organization, field wheels, girders, excavating a shovel, transporting chains, choosing sieve, they can integraly complete the working procedures such as harvesting , excavating, choosing, the series include the middle drive transmission and the left-side drive transmission for different types of tractors.
| Model | Unit | 4UD-1 | 4U-1 | 4U-2 |
| Overall dimensions(L*W*H) | cm | 240*90*100 | 240*100*100 | 280*220*100 |
| Weight | kg | 180 | 220 | 600 |
| Rows | 1 | 1 | 2 | |
| Space of rows | 55-80 | 55-80 | 55-80 | |
| Productivity | ha/h | 0. 2-0. 33 | 0. 2-1. 33 | 0. 33-0. 54 |
| Working depth | mm | 20-35 | 20-35 | 20-35 |
| Working width | mm | 600 | 850 | 1600 |
| Netrate of harvesting | 97% | 97% | 97% | |
| PTO speed | RPM | 540 or 760 | 540 or 760 | 540 or 760 |
| Linkage | 3-point mounted | 3-point mounted | 3-point mounted | |
| Matched power | kw | 12-30 | 15-40 | 50-70 |