It is found that the shaking of concrete mixer truck usually has the following three situations. The specific causes of each situation and the corresponding treatment methods are summarized in detail
The tank of mixer truck vibrates when it is running
Due to the accumulation of material in the tank of the concrete mixer, the gravity center of the tank body will shift, and the tank will vibrate when it runs. The failure performance of tank shaking of mixer truck caused by accumulation of material: the shaking changes periodically with the operation of tank body; the shaking of tank body does not exceed twice a week. Such faults can be identified by marking the tank. Of course, it is not ruled out that the center of gravity of the tank body is offset due to the processing of the tank body, but most of the main engine plants have strict requirements for the processing of the tank body, so the possibility of the center of gravity deviation of the tank body is very small. In addition, all mixers will be debugged when they leave the factory. The mixer with the center of gravity of the tank will not leave the factory at all. Therefore, the possibility of the center of gravity deviation of the tank body caused by the processing of the tank body is extremely low for the user.
The body of the mixer shakes during driving
If the concrete mixer truck in the process of driving, found that the body has a slight vibration or offset, generally caused by the tire failure.
It may be that the tire balance is not good. The owner needs to make a four-wheel alignment and tire dynamic balance as soon as possible. If the vehicle does not deviate, the tire dynamic balance can be done. It may also be due to the deformation of the steel ring, which requires the owner to go to a professional repair shop for inspection. This kind of situation generally occurs on the mixing body with long service life. Generally, when the new tire and new steel ring are replaced, the tire balance should be done once. Otherwise, when the counterweight is uneven, it is easy to shake.
When the mixer is idling, the body vibrates
If the driver starts the concrete mixer or stops the truck without turning off the engine, it may mean that there are three conditions for the mixer truck:
1. Serious carbon deposition in mixer engine. When there is too much carbon deposition in the engine, the gasoline ejected from the cold start fuel injection head will be absorbed by carbon deposition, resulting in the mixture of cold start is too thin, making it difficult to start. In this case, only when the gasoline absorbed by carbon deposition is saturated, it is easy to start the car. After driving, the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the mixer engine for combustion, and the mixture will become rich. The combustible mixture of the mixer engine will be diluted and sometimes rich, resulting in idle jitter after cold start. The lower the temperature is, the more oil is needed for cold start, and the existence of carbon deposition will affect the success of cold start. The serious problem of carbon deposition in the engine of mixer truck can be solved by cleaning the oil circuit and cleaning the carbon deposition of idle motor.
2. The ignition system of the mixer truck has problems. Check the working conditions of the spark plug, high voltage wire and ignition coil. If the ignition system is not working well, the spark plug is not in good condition, which will lead to this kind of fault phenomenon. If there is such a situation, it is necessary to check whether the spark plug of concrete mixer has excessive carbon deposit, and replace the spark plug in time.
3. The oil pressure of mixer truck is unstable. If you have cleaned up the engine carbon deposit, washed the throttle valve, replaced the spark plug, and still found the body shaking at idle speed, it is recommended that you go to the repair shop to check whether the fuel supply pressure and intake pressure sensor are normal. If the fuel supply pressure of the oil pump is abnormal or the value of the intake pressure sensor is wrong, the body shaking will be caused, and the parts should be replaced if necessary.