莆田市汽车运输总公司于1995年度购进了30多辆YZL6700型扬子普中客.其中有好几辆存在中桥振动问题,有的甚至引起飞轮壳屡换屡裂。我们曾怀疑前传动轴的平衡块掉了,造成动不平衡而出现振动。但换了一根传动轴,未能解决中桥振动问题。之后,在中桥中间轴承架上加了一块减振橡胶垫,振动有所缓和,但飞 Putian City Motor Transport Corporation purchased more than 30 YZL6700-type Yangtze Pratt & Whitney customers in 1995. There are several vehicles in the bridge vibration problems, and some even caused frequent replacement of flywheel shells repeatedly. We have suspected that the balancer of the front drive shaft has been dropped, resulting in unbalanced vibration. But for a drive shaft, failed to solve the bridge vibration problems. After that, add a piece of vibration-proof rubber pad on the middle axle bracket of the bridge, the vibration has been alleviated, but the fly