Five farm machinery repairs are not allowed

In the maintenance of agricultural machinery, some operators and maintenance personnel plan to save time and save costs, and they will use some opportunism. In fact, this is not desirable:

First, install the piston sheath is not open flame heating. Because the piston seat is thicker and the other parts are thinner, the coefficient of thermal expansion after the open flame is warmed is large, and the piston is easily deformed. Generally, the open flame heating temperature is high. During the natural cooling process, the metal structure inside is damaged, thus reducing the wear resistance and service life of the piston.

Second, replace the oil can not clean the oil. It is unscientific for many operators to inject lubricants into oils without replacing the oil pans or oil passages when changing oils. This is because the oil pans and oil passages have not been cleaned and contain many impurities. The surface of the parts will increase the wear of the parts, especially the new or overhauled locomotives. After the test run, there will be more impurities. If the parts are not cleaned and entered into the working state, there will be accidents of burning tiles and shafts.

Third, install the cylinder can not be coated with butter. Many people prefer to apply a layer of butter to the cylinder block when installing cylinder head gaskets. When the butter is melted and lost in high temperature, the gap between the cylinder head, cylinder block, and cylinder head gasket creates gaps. The gas easily escapes from it, resulting in air leakage from the cylinder and damage to the cylinder head gasket. The coke produced when butter meets high temperatures can also deteriorate the cylinder mats, increase the difficulty of assembly and disassembly, and bring a lot of trouble to repair.

Fourth, tighten the connecting rod screw can not use torque wrench. Most drivers do not use torque wrenches when tightening the connecting rod screws, but use special wrenches to tighten and tighten. In this way, the connecting rod screws have excessive internal force due to excessive force, causing excessive fatigue of the metal and causing the connecting rod screws to break, resulting in a motorcycle accident.

Fifth, the air filter must not be installed when driving. The engine must absorb fresh air during operation and eliminate exhaust gas. If no air filter is installed, a large amount of dust in the air will be sucked into the cylinder by the engine during the operation, which will accelerate the wear of the engine and reduce the power of the engine.

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