How to solve the noise of the grass mower

After the grass mower has been used for a period of time, some noise will be generated. Where does this noise come from? What measures should we take? If our machine has been used for a long time, there will be noise in the cabin, or the cutter disc shakes, this may be because the main shaft bearing of the machine is damaged. If we replace the main shaft bearing of the machine in time, there will be no problem. Another thing is that if the machine vibrates and moves, what is the situation? This is not because our machine has long legs. This situation may be caused by the cutter disc of our machine losing balance. It may be that the hammer falls or the fan blades are broken. The gear may also be missing other parts. At this time, we can replace the parts in time and there will be no problem. Another reason is that there is no lubricating oil in the gearbox, which causes the gears to wear and the distance between the umbrella scales is too large, which causes noise.