发动机分解一般是先拆卸机体外部机件，而后再拆卸机体内部机件，这样发动机重量会减轻，便于吊出。
Engine decomposition generally starts with disassembling the external parts of the body, and then disassembles the internal parts of the body, so that the weight of the engine will be reduced and it is easy to hoist out.
①拆卸发动机盖上的连接件和附件。
Remove the connecting parts and accessories on the engine cover.
②发动机必须在完全冷却的状态下进行拆卸，以免机件变形。
(2) The engine must be disassembled under the condition of complete cooling in order to avoid deformation of the parts.
③放净散热器及水套内的冷却液，放净油底壳内的机油。
(3) Clean the coolant in the radiator and water jacket and oil in the oil pan.
④拆卸燃料系统。关闭汽油箱开关，拆下连接化油器、汽油泵的油管及接头。拆下节气门连接件、阻风门拉线，卸下空气滤清器、化油器、汽油泵。拆卸排气管和进气歧管、排气歧管。
(4) Dismantling the fuel system. Close the switch of the gasoline tank and remove the tubing and joint connecting the carburetor and the gasoline pump. Remove throttle connector, choke cable, air filter, carburetor and gasoline pump. Remove exhaust pipe and intake manifold and exhaust manifold.
⑤拆卸电系。拆卸蓄电池极柱上的夹头电缆，卸下蓄电池。拆卸机体上的全部电线（高压／低压线、起动机缆线、发动机连接线、分电器连接线等），卸下起动机、发电机、分电器。
(5) Dismantling the power system. Remove the chuck cable on the battery pole and remove the battery. Remove all wires (high/low voltage wire, starter cable, engine connection wire, distributor connection wire, etc.) on the body, and remove starter, generator and distributor.
⑥拆卸冷却系统。拆下散热器罩、进水／出水管、旁通水管，拆卸散热器框架和散热器。拆下风扇胶带、水泵和风扇叶片。拆卸冷却液温度表传感器。
Remove cooling system. Remove radiator cover, water inlet/outlet pipe, bypass pipe, radiator frame and radiator. Remove fan tape, pump and fan blade. Remove the coolant thermometer sensor.
⑦拆卸润滑系统。拆卸机油滤清器、机油表传感器，抽出机油标尺，卸下曲轴箱机油加人管。
Remove lubrication system. Remove oil filter, oil gauge sensor, extract oil gauge, remove crankcase oil filler pipe.
⑧拆卸离合器拉杆及分离叉拉臂、传动轴，拆下变速器。
(5) Remove clutch pull rod, fork pull arm and drive shaft, and remove transmission.
⑨若连同变速器一同拆卸时，须先断开和离合器踏板的连接。
If the transmission is disassembled together, the connection with the clutch pedal must be disconnected first.
⑩拆卸发动机支座螺栓。有撑杆的亦应同时拆卸。
_Remove the engine support bolts. Those with braces should also be dismantled at the same time.
