This series product is a middle and small hp tractor directly connected with its engine. It has the characteristics of high transmission efficiency, low tremble, high traction, high adaptability and easy start; it is the upgraded generation shift product. Jaw type differential lock can improve the pass-ability. Hydraulic output interface can make direct connection with the dump trailer. This series tractor can have many different configurations according to customer抯 demands: single stage clutch or two stage clutch, (3+1) ? six shifts or (4+1) ? eight shifts in which the creeping shift can be selected, one or two standard PTO rev., fixed or adjusted tread, back catalogue ??or ??suspensions.