First of all, before we analyze the cause of the failure, there are several precautions to pay attention:

1. You cannot disassemble the machine blindly. You should first find out whether the fault is external or internal to the steering gear, so as not to waste time and expand the fault

2. The components of the steering gear cannot be disassembled blindly, and cannot be disassembled too hard, so as not to damage the original and cause new failures.

3, can not be adjusted casually, adjustment should be recorded, adjustment has no effect on the fault should be put back in place

4. Records should be made when disassembling, and various parts should not be lost and confused, and the installation position and direction of components and wires should be mistaken.

5. Avoid short circuit caused by solder or residue; when live operation, protection and insulation should be done to avoid short circuit

analysis method

It is possible to find out the fault point directly through observation, and some faults can be eliminated directly, such as welding and assembly faults. However, it should be pointed out that many faults are only superficial phenomena, and deeper reasons may be hidden under the superficial phenomena. It is necessary to test the corresponding circuit parameters of the corresponding circuit according to the fault phenomenon, and analyze the test results (phenomena) in combination with the circuit principle in order to find out the root cause of the fault and the real fault point.

Common fault solutions for steering gear:

1. Observation method: Observation method is a method of finding line faults through human body feeling. It can be divided into static observation and dynamic observation.

2. Measurement method: The measurement method is to use measuring equipment to test the relevant electrical parameters of the circuit and compare them with the parameters provided in the product technical documents. The measurement method is the most widely used and effective method in fault finding. According to the characteristics of the measured electrical parameters, it can be divided into voltage method, current method, resistance method and waveform method.

3, replacement method: replacement method is the use of good performance of the steering gear device, components (or the use of the same type of normal steering gear of the same device, components) to replace the product may produce a fault part, to determine the location of the fault of a method.

4. Comparison method: Use the same type of steering gear and compare it with the steering gear to find out the fault. This method is called comparison method. During maintenance, the corresponding points of the two can be compared, and the problem can be found in the comparison and the fault can be found.

5, heating/cooling method: heating method is to use electric iron to heat the suspected components, so that the fault appears in advance, to determine the cause and location of the fault method. It is especially suitable for the whole machine maintenance that has just started to work normally and needs to work for a period of time before failure occurs.

The cooling method is the opposite of the heating method. It uses alcohol and other volatile liquids to cool the suspected components and make the fault disappear to determine the cause and location of the fault.