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德特—75Mл拖拉机的配套动力是A—41型发动机.该机的曲轴与曲轴齿轮是花键连接的.安装时往往出现错位.若误将曲轴端部一缸上止点记号与曲轴齿轮记号相对,装复后又不进行配气相位的检查,将导致发动机不易起动、敲缸、冒黑烟、功率下降,甚至会造成配气机构损坏或出现捣缸事故等.为避免上述情况发生,其正确的安装方法是:将曲轴转至一缸上止点位置,将中间齿轮装入,并与配气齿轮、喷油泵驱动齿轮上的记号对准,最后装入曲轴齿轮,使其记号与中间齿轮记号对准,此时曲轴上的上止点记号应垂直水平面.装复后还应进行配气相位的检查.方法有三.其一,该机进气门是在上止点前20°开始开启;排气门是在上止点后20°关闭.若一缸处于压缩行程上止点时,四缸进排气门应处于同一水平位置,都在开启状态.所以,检查时应观察进排气门的开度是否一样,以此判断安装是否正确.其二,自制一与曲轴皮带轮
Tractor-75Mл tractor supporting the power of the A-41 engine.The crankshaft and crankshaft gear is splined connection installation is often misplaced.If the crankshaft end of a cylinder top dead center mark and crankshaft gear mark Relatively, do not carry out the inspection with the gas phase, will result in the engine is not easy to start, knock the cylinder, black smoke, power down, and even cause damage to the valve mechanism or the occurrence of pounding cylinder accidents, etc. In order to avoid this situation, The correct installation method is: the crankshaft to a cylinder on the dead center position, the intermediate gear into, and with the gear, the injection pump drive gear markings, and finally loaded into the crankshaft gear to mark Middle gear mark alignment, then the top dead center mark on the crankshaft should be vertical horizontal plane .After the installation should be carried out with gas phase check .Three. First, the aircraft intake valve is 20 ° before the top dead center Began to open; exhaust valve is 20 ° after the top deadline closed.If a cylinder in the compression stroke top dead center, the four-cylinder intake and exhaust valves should be at the same level, are open, so check should be observed Into the exhaust valve opening is the same, in order to determine safety Is correct. Secondly, and made a crankshaft pulley