1. The timing belt becomes loose after being used for a while. When the timing belt cannot fully fit the gear, a low-pitched howling noise occurs when the cold engine starts. If there is an abnormal noise in the belt, we can try to resolve it by adjusting the tensioner or replacing the belt. When the engine runs well, this abnormal noise will disappear automatically. Actually, it's not a major problem. Simply replace the aging timing belt regularly to largely avoid this problem.
2. The belt may slip on the generator, causing strong friction and vibration between the belt and pulley, producing a sound of a certain frequency. Use a polyol solution to coat the land breeze to maintain some elasticity and reduce slippage. For a new car, one application is enough. Ifthe belt is older, it must be applied continuously for 3 days.
3. The belt drive accessory is affected by other equipment. For example, if the bearing is damaged or stuck, the power of the belt drive accessory will increase and the belt will work excessively. remains in this state for a long time, the power of the belt drive accessory will increase.
4. This may be due to reduced friction coefficient of the belt surface and excessive belt wear. The owner should check and replace it in time. , the owner can observe one of the transmission belt assemblies. , through observation, it can be found that there is an abnormality in the automatic belt tensioner. There is usually a belt wear length indicator mark on the bottom of the automatic belt tensioner. If the pointer exceeds the range, thisa means that the belt has been excessively worn, and the car owner should replace it in time to prevent more breakdowns from occurring during driving, affecting driving safety.
How to judge abnormal belt noise:
You can determine which belt has a problem by listening to the sound. For example, it could be a problem with the air conditioning compressor belt. If the problem occurs when the car starts cold, an abnormal noise may be caused by a problem with the engine belt. In this way, the belt abnormality can also be roughly determined.
The main reason for belt deviation is that the driving force on both sides of the belt is inconsistent, making the friction force different in size and direction. It is necessary to adjust the position of the drive roller and reversing roller, adjust the device tebelt tensioner, etc.
The main reasons for the belt deviation are:
The quality of the belt is not up to standard, causing the belt connector to fail is not smooth, which may cause uneven stress on both ends of the belt during operation resulting in belt deflection.
Long-term operation will cause long-term deformation or edge wear due to stretching or wear, resulting in belt looseness or insufficient tension, causing deviation of the belt.
When the center line of the belt is not perpendicular to the axis of the drum and the freewheel, and the head of the belt conveyor or the axis of the transmission drum to the end or freewheel is not perpendicular to the center line of the belt, the traction force will be broken down into several different directional forces. Strengthdirectional is caused by the deflection of the roller due to the reaction force. The deviation adjustment method is to adjust the positions of the driving roller and reversing roller, adjust the belt tension device, and adjust the carrier roller group. Strengthen the quality testing and maintenance of traditional Chinese medicines every day.