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我单位的６１３５ＺＤ型柴油机，大修后投入使用仅１０天，Ⅳ缸的进气门摇臂就从气门调整丝扣与摇臂轴孔之间折断了（如图１Ａ—Ａ处）。 初步分析，故障与摇臂的材质有关，因为在摇臂的断口处有铸造气孔。更换摇臂后试机，这时发现Ⅳ缸摇臂座紧固长螺杆有异常摆动现象，但柴油
The 6135ZD diesel engine of our unit was put into use only after 10 days of overhaul. The inlet cylinder arm of the IV cylinder was broken from the valve adjusting screw and the shaft hole of the rocker (as shown in FIG. 1A-A). Preliminary analysis, failure and rocker material, because there are cracks in the rocker casting hole. Replacing the rocker after the test machine, then found Ⅳ cylinder rocker arm fastening long screw abnormal swing phenomenon, but diesel