The car driving certain mileage on a flat surface, the rear axle temperature rises to normal, then when the vehicle abnormal noises, down speed, parking, the transmission is in neutral position, and then slowly until the engine speed is accelerated, and the abnormal sound when the speed is. To observe the occurrence of abnormal sound, can be repeated several times, to determine whether the engine exhaust noise or abnormal condition caused by.
Tire noise and rear axle noise
Tire noise changes with the road surface, the rear bridge noise is not. When the speed of the vehicle is lower than 48km/h, the noise of the rear bridge disappears, while the tire noise continues to exist. When the car is driving and coasting, the noise of the tire is the same, but the noise of the rear axle is different.
The resolution of the noise and rear axle noise of hub bearing of Baotou North Benz parts
When the car is running and sliding, noise bearing unchanged, such as keep the speed constant and apply brake, the wheel bearings reduce part load, which can reduce the noise, you can find out where the noise comes from.
When the speed is more than 48km/h, unless the rear axle was seriously damaged, general rarely heard noise of the rear wheel bearing, automobile sliding or neutral, rear wheel bearing crack will have a “rumble” sound, while the rear wheel bearing erosion was issued a “rustling” sound.
Resolution of the difference between the conical bearing and differential bearing of reducer
The bearing of the reducer usually produces a harsh “rumble” or “rattle” sound, which is stable with the change of vehicle speed.
The speed of the front axle bearing of the cone drive gear of the speed reducer is larger when the car is sliding, and the noise of the rear bearing is larger when driving.
The noise of the differential bearing is usually a constant harsh sound, but its beat is much more relaxed than the speed of the taper gear drive.
Resolution of rear axle gear noise
In the normal straight line, due to the northern part of the Baotou Benz parts differential gear and planetary gear wheel almost no relative movement, so you can not hear the noise.
In the process of driving causes of rear axle gear knock occurs mostly by poor lubrication caused by, resulting in gear grinding scars, if can hear abnormal noise in various sliding speeds, that is caused by the driving gear reducer nut loose.
Low speed, the rear part of the bridge hit sound, acceleration or deceleration, the issue of a particularly dull sound. The above fault can be found from one or more of the following:
The gap between the axle shaft and the differential case of the differential parts of the North Benz parts in Baotou.
Improper matching of differential cross shaft journal and differential case.
Improper side clearance of the half shaft spline gear and differential half shaft gear key.
The meshing clearance of differential half shaft gear and planet gear is not proper.
Improper meshing clearance of active and passive gear of differential cone.
The thrust washer wear.
When the vehicle is traveling, the abnormal noise of the rear axle is due to the improper meshing of the gears, the improper adjustment of the differential bearing preload, or both. When the abnormal noise is removed, the meshing clearance between the differential gear and the reducer gear is needed to be opened, the preload of the bevel gear drive bearing and the contact trace of the reducer gear are needed to be checked.