Tractor electrical equipment failure, the basic principles of inspection and diagnosis and mechanical failure, as well as "easy after the first, after the first simple and complex, first outside after the first hands-on analysis." In order to avoid blind demolition, time-consuming work, and even due to chaos Dismantling and unloading cause undue damage. Some experienced robots have found some tips for checking electrical faults in their production practices. The details are as follows:
1. After the line first, an electrician found that the tractor horn that he was driving did not sound, and replaced a new horn, but the fault still existed.
In fact, for such electrical failures, there are many problems on the line, so it should be checked from the line. After careful inspection, it was found that the insulation of one of the wires was damaged, causing a short circuit in the circuit ground, so the replacement of the new speaker did not ring. Wrap the insulation with the insulating tape and fix the wire. Connect the horn circuit and the sound is loud, indicating that the horn has returned to normal.
In this case, the fault is not complicated. If the operator checks the circuit first, he does not need to pay for the new speaker. The reason why the electric horn does not ring is easy to detect. Due to the wrong thinking of the operator, it took money and spent time, and also delayed the operation time.
2. The first part of the joint after the start of the engine, found that the speed of the electric starter is very low, even with the engine. He suspects that the battery is not fully charged, or the plate is heavily vulcanized, so he replaced the new battery. The new battery technology is in good condition and sufficient power is available. The engine is started and the speed of the starter is still obviously low. He thought that the electric starter had a fault, so he bought a new starter and switched on the starter switch. The fault still exists.
For such failures, check the connection of the battery ground wire and the live wire and the condition of the wire. Upon inspection, it was found that the bolts at the connection between the ground wire and the rack were loosened, and there was dirt in the gap between the joint and the metal of the rack, which increased the resistance at start-up, so the starter's rotation speed was not enough. Remove the bolt and grind the joint between the joint and the frame with an emery cloth, tighten the bolt, and try to start the engine. The motor will return to normal. It can be seen that during the use of the tractor, if the starter does not turn or rotate, it is necessary to first check the power connector and the power cord to see if there is any abnormality, and do not rush to disassemble or replace the electrical components to avoid injury.
3. First look at the post-processing of a tractor found in the tractor driving the tractor equipped with the alternator power generation is very small. Due to the recent maintenance of the generator, it was suspected that there was a problem with the regulator and the regulator was replaced, but the fault persisted. The pilots had to make further observations and inspections. As a result, it was found that there were many carbon powders and copper powders on the brush holder of the alternator, and the carbon powder and copper powder were tentatively removed. After a test run, the alternator returned to normal.
The two brushes of the alternator provide excitation current to the rotor windings. As the working time is extended, the ground carbon powder and copper powder will be covered with the surface of the carbon brush holder, causing the excitation current to leak and short-circuit, causing the rotor The magnetic field weakens or even does not energize, causing the alternator not to generate electricity or generate a small amount of electricity. When the maintenance engineer was maintaining the generator, the operator neglected the cleaning work of the generator. When there was a failure, he did not observe and inspect it and blindly replaced the regulator.
Such failures should be carefully observed and inspected. A thorough analysis of the problems found should be carried out to find out the reasons for the problems. The problems can then be resolved and the detours can be avoided.
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