YISHAN-180 crawler type bulldozer (Model D70LE)is a product manufactured on the basis of Technical Cooperation Contract signed between our Tianjin Construction Machinery Works and Komatsu Ltd of Japany. The parts and units , which are produced strictly in accorddance with technical standard providerd by Komatsu Ltd . are interchangeable with the parts manufactured by Komatsu Ltd. When ordering parts for the bulldozer ,be sure to give the model number , the serial number and the ex-factory