例1 一辆尼桑皮卡(PICR-UP)双排座客货车,当行驶速度到达40km/h,底盘出现“咕噜、咕噜”的响声;当行驶速度为50～60km/h时,响声增大;当行驶速度达到80km/h以上时,则听不到异响。对此,不少维修人员怀疑是传动装置发出的响声。 从现象看,其响声与后桥轴承、半轴轴承发生的响声确有相似之处。但经仔细反复听诊,后桥及半轴轴承并无异响。随后在试车时,发现前轮响声明显,遂停 Example 1 A PICR-UP double-decked passenger van with “grunt and grunt” sound when the driving speed reaches 40km / h; the sound increases when the driving speed is 50 ~ 60km / h; When the driving speed reaches more than 80km / h, you can not hear abnormal sound. In this regard, many maintenance staff suspected the sound of the transmission. From the phenomenon of view, its sound and rear axle bearings, semi-axial bearing noise does indeed have similarities. However, after careful repeated auscultation, axle and axle bearings no abnormal sound. Then when the test, I found the front bellow sound obvious, then stop