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(1)使用工具不当用一把活动扳手包揽机械上所有大小螺母和螺栓的拆卸及安装。这样极易使扳手滑转,将六角“揉”圆,无法再紧固,给下次拆装带来困难。(2)用力不当误认为螺母越紧越好,盲目使用加力杆或用锤子猛击扳手柄,由于力的大小难以控制,造成螺栓折断或滑扣。有的从螺栓表面看虽然完好,但丝扣产生严重“内伤”。若是连杆、平衡块、气缸盖或飞轮等螺栓,在有内伤情况
(1) Improper use of tools Use an adjustable spanner to remove and install all sizes of nuts and bolts on the machine. This is very easy to make the wrench slide, the hexagonal “rub ” round, can no longer tighten, to the next disassembly cause difficulties. (2) improper use of force mistakenly believe that the nut as tight as possible, the blind use of force lever or hammer wrench, due to the size of the force is difficult to control, resulting in bolt breakage or sliding buckle. Some look good from the surface of the bolt, but the thread produces serious “internal injuries.” If the connecting rod, counterweight, cylinder head or flywheel bolts, there is an internal injury