For the pulley, the belt is a very important part in the pulley use, we will find that the belt before use, two is necessary to check the following, we will look at it together. Check the belt pulleys includes two aspects: the belt tension and belt wear. First check belt tension pulley, then you can use your thumb, strongly pressed the middle two belt pulleys. The pressing force of about 10kg, if the reduction of the belt is about 10mm, is considered proper belt tension knock. If excessive pressure is considered insufficient belt tension. If the belt hardly occurs reduction is considered excessive belt tension. When the lack of tension, the belt is prone to slipping. The tension is too large, it is easy to damage various auxiliary bearings. For this reason, it should be related to the adjusting nut or bolt loosen the belt tension adjustment to the best state. In addition, it must be noted that the wear of the belt pulley. Old belt badly worn, the belt and pulley contact area dropped. Then as long as the force of a press belt, the belt will sink deep into the pulley groove. There is a belt of rubber aging problem, if the belt rubber is aging, must promptly replace the new belt. In front of the engine several root pulley belts, each belt must assume an important role. On the engine, via a belt drive to drive various auxiliary operation, such as an air conditioner compressor, power steering pump, alternator and so on. If the belt is broken, or there has been slippage, it will make the loss of function associated auxiliary equipment, or its performance decline, thus affecting the normal use of the car. Therefore, daily inspection of the belt is very important. 

palabras clave: Pulley, the pulley, the pulley,