The nine simple and effective agricultural machine maintenance techniques are more suitable for manual diagnostic and repair methods that are easily accessible and proven by long-term empirical tests and are more suitable for use by farmers than for testing and repair using specialized agricultural machine failure diagnostic equipment. 1. If the pressure of one or more cylinders is too low for the engine to be installed, the impregnated vents can be injected from the vents of the jets with approximately 5 ml of oil, then the convoluted axis will be rotated and the compressed pressure of the cylinders measured. (a) if the compressed pressure of the cylinder is generally increased after the oil is injected, but is still below the standard values, indicating that the gas door is not sealed or the gasket leaks; if the compression pressure in the adjacent two cylinders is clearly low, this means that the gasket was broken between the two cylinders. In addition, the replacement of the top gas-gate structure allows for the removal of the oil dispenser and then the rotation of the arcs, the movement of the piston to the upper end, the search for a hook iron, the insertion of a burning chamber from the hole where the jet is installed, the pressure on the outer end of the iron, the use of leverage to hold the other end to one of the gas-gates, and the removal of the gas-gate locks and springs, which can easily and safely replace the new gas-gate seals or the gas-gate springs without the need to remove the entire air-cylinder cap and gaskets and to avoid falling into the tank. 2. A single-cylinder gas cut-off to determine the cause of the gas gas in the radiator is a yc6105q diesel machine with a breathing sound in the work radiator, similar to a boiler phenomenon, which is more pronounced at acceleration, when the temperature of the cooling fluid is 70°c. No anomalies were observed in the examination of gas tank caps, gas tank pads, cooling fluid pumps and thermostats. Thus, the gas pipe was removed, the engine was shut down, a whole cotton veil was found, water was damp, and the gas vents were covered individually, and single-cylinder gas was cut, while another person was able to observe the movement of the liquid surface within the vent of the radiator and the liquid cooling fluid. When the air vents of the 4th tank were covered, it was found that the liquid surface of the cooling fluid in the radiator had decreased significantly. The gas tank kit from the 4th tank was removed with a tractor and found to contain an undetectable horizontal crack. With the replacement of the gas cylinders, the breathing sound in the radiator no longer exists. 3. The use of medical syringes instead of vacuum guns, which are expensive and difficult to maintain, can be replaced by medical syringes that are readily available on the market. The method of use is to pull the syringe outward, which can draw a vacuum; and to push the syringe internally, which can generate pressure and apply to the maintenance of a linear qualitative detection of aerodynamic components and break-out components. 4. Checking the state of the wire beams by hand for electrical beams everywhere can be done by hand if it feels inside the beams
