This series of products is currently the performance of advanced direct-linked small horsepower tractors, two-wheel drive and four-wheel drive two series. With the transmission efficiency, low vibration, traction, adaptability, start-saving features, is a small four-wheel tractor upgrading. Equipped with a jaw differential lock, improve the unit through; set up a hydraulic output interface, can be directly connected with the dump trailer. (3 + 1) * 2 six-speed or (4 + 1) * 2 eight-speed gearbox; eight-speed gearbox can be a variety of configurations; can be used for single or double-acting clutch according to the needs of different users; Optional crawler; power output can be single-speed, but also two-speed; fixed or adjustable track; rear "O" or "I" class suspension. This series product is a middle and small hp 4-wheel drive tractor directly connected with its engine specially used in mountain areas and muddy roads. It has the characteristics of high transmission efficiency, low tremble, high traction, high adaptability and easy start. 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's demands: single stage clutch or two stage clutch, (3+1)x2 six shifts or (4+1)x2 eight shifts where the creeping shift can be selected, one or two standard PTO rev., fixed or adjusted tread, back catalogue '0' or '1'suspensions, mechanical steering or hydraulic steering and so on.