Model 4U harvest of yams are suitable for potatoes、sweet potatoes、garlic and other root crops ,it is composed of components such as cutting seeding organization、field wheel、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.