... reliable and easy to maintain, long life-span3.,Transmission Similar with Komatsu fixed-axle transmission, shift by the engage or disengage ... type, multiple disc, easy to maintain. Easy to operated with hydraulic booster 5.,Final drive Same as Kumatsu D65 type ... design and produce Shanghai PD120 bulldozer in accordance with Kumatsu design, so the measurement and inter-position of idle roller, sprocket, ...