After the carbon brush was replaced in the cutting machine, the vibration was very severe. What happened?

First, the throttle When we step on the throttle, the vehicle has some jitter, and in most cases it is the throttle problem. Generally, it is the dirty throttle that will cause the body to shake. When carbon deposits or other pollutants are adsorbed on the throttle valve, the amount of air inhaled by the engine will be unbalanced with the amount of oil sprayed by the fuel nozzle, resulting in insufficient fuel when the engine is working, which will cause the car body to shake. In this case, just go to the repair shop to clean the throttle. Second, the spark plug is the ignition device in the engine. If there is a problem with the spark plug, then the mixture in the cylinder will not ignite and the cylinder will not work. This is the decline of vehicle power, which is what we call lack of cylinder. If you drive frequently, if the vehicle feels strong shaking, the vehicle has no power, and this shaking exists from the start of the vehicle to the flameout, then it is mostly a spark plug problem. At this time, it is necessary to check whether the spark plug of a cylinder is broken. Spark plugs are consumables. For car owners, regular maintenance should check the spark plug, and if the collision core of the spark plug is running out, it should be replaced in time. 3. Rubber ball cover This rubber ball cover itself is a consumable part, and its main function in the car body is also to play a role in shock absorption and dust prevention. It is usually installed at the joint between the engine and other parts. When the rubber sleeve is damaged, the vehicle will feel shaking when stepping on the brakes, and the shaking feeling will disappear when releasing the brakes. In this case, the ball cover will be executed. 4. As an important part of vehicle braking, brake pads play a vital role in the safety of vehicle driving. As long as you drive, you will use the brakes. After a long time, the brake pads will wear more. The brake pads are much worn, the braking effect will be reduced when braking, the body will shake, and there will be some harsh sounds at the wheels when braking. Then it's time to check the brake pads and replace them in time. When driving, the body shakes, indicating that there must be something wrong with a part of the vehicle. For the sake of our driving safety, we must check the vehicle in time and replace the damaged parts.