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在伟大领袖毛主席“独立自主、自力更生”方针指引下,我厂与天津工程机械研究所在上级领导同兄弟单位的亲切关怀和大力支持下,共同研制了7～9米~3(C4—7型)自行式液压铲运机(外观见图1及封三),为我国基本建设提供了大型土方设备。在产品设计试制过程中,贯彻了两个“三结合”的方针,广泛地集中了群众的智慧和力量,对12项共109个主要零部件进行了台架试验,突破了技术难关,使该产品具有结构先进、操纵轻便、机动灵活、使用可靠及外形美观等优点;并成功地应用了液力机械传动和液压操纵。
Under the guidance of the great leader Chairman Mao’s “independent, self-reliant” approach, our factory and the Tianjin Institute of Engineering Machinery jointly developed 7 to 9 meters~3(type C4-7) under the leadership of the superior leadership and brotherly unit. ) Self-propelled hydraulic scrapers (see Figure 1 and 3 in appearance) provide large earth-moving equipment for China’s basic construction. In the product design trial production process, the two “three-in-one” approach was implemented, and the wisdom and strength of the masses were extensively concentrated. Bench tests were performed on 12 major 109 parts and components, breaking the technical difficulties and making the The products have the advantages of advanced structure, light handling, flexible operation, reliable use and beautiful appearance; they have successfully applied hydraulic mechanical transmission and hydraulic control.