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Diagnosis of Agricultural Transport Vehicle Failures Using Visual Methods
The intuitive diagnosis method is to determine the fault of the agricultural transport vehicle by in-situ or road test, observation and feeling or using simple tools. The use of this method to diagnose the technical conditions and failures of agricultural vehicles has the advantage of low investment and no need for special equipment, so it is commonly used by operators and maintenance departments. When using the intuitive diagnosis method to diagnose agricultural vehicle faults, we should first find out the symptoms of the fault, what features and accompanying conditions, and finally from the simple to the complex, gradually in-depth from the table and in, reasoning analysis, and finally make a judgment. This diagnostic method can be simply summed up in six words: ask, see, hear, smell, touch, and try. Q: It is the investigation. In addition to the driver diagnosing the malfunction of the vehicle he is driving, anyone must first clarify the situation before he diagnoses the malfunction. Such as the mileage of the vehicle has been traveling, road conditions, the recent maintenance, the pre-symptoms of the failure occurred, is a mutation or a gradual change. Doing blind diagnosis without asking questions will inevitably affect the speed and quality of diagnosis. Look: It's observation. For example, observing the exhaust color of agricultural vehicles, combined with analysis of other conditions, can roughly determine its working conditions. Listening: It is through hearing to determine the sound of agricultural vehicles, and from the abnormal sound of vehicles to determine the fault. Sniffing: It is to judge the location of the fault by some special odors emitted in the transportation of agricultural vehicles. If the wire is short-circuited, it will give off a pungent odor of burning plastic. This method is particularly effective for diagnosing common faults in electrical circuits, friction linings, and the like. Touch: It is the temperature, vibration condition, etc. that may cause malfunction by hand touch, so as to judge whether the matching vice has any bite, whether the bearing is too tight, and whether the diesel pipeline has oil supply pulsation. Test: Test verification. If the diagnostic personnel personally test the car to experience the fault site. If you can use the single-cylinder oil cut method to determine the location of engine noise, use the replacement parts method to confirm the fault department. Of course, the above six aspects are not necessarily required for each type of fault diagnosis. Different types of faults can be flexibly used depending on their specific conditions.
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