(1) the reason of bearing damage is the bearing hanger lack of oil, resulting in increased bearing wear or erosion and looseness, or because of disrepair, the outer diameter of the bearing seat hole and rotate Songkuang, rubber bearing outer rupture or fall off, forming the drive shaft in the financial frame beat, resulting in lower rack fracture, fracture bolt and bolt connection.
(2) the damage reason of the transmission shaft part is around the drive shaft, universal joint fork flange joint, uranium fork, keyway expansion joint shaft deformation, which makes the whole axis swing drive shaft drive; or field joint lack of lubrication oil and excessive wear loose; or because of expansion joint between sliding groove and groove increased wear loose etc.. The whole set of transmission shaft in the transmission space gap increases and produces axial shimmy, the center hanger has been affected by its shock and the lower part of the fracture.
(3) a drive shaft hanger truck, the car in 40s has maintained at (bearing tile frame) bracket type towel heart qi in the beam, the material to be Duan Zhutie (Ma Gang) casting, the structure of the hanger fit only to cut heavy truck tonnage is relatively low (modern transmission the shaft center bracket for steel plate pressing and welding material, is sheathed on the crossbeam, more insurance). The cast hanger is prone to fracture because of improper process, loose or porous metal, brittle material and so on. In the warranty center due to improper installation hanger method of fastening bolts, no uniform installation or assembly balance hanger hanger hanger hanger or cover, the cover up, a little concentrated stress and fracture, resulting in broken hanger.
As long as there is one of the factors that cause the damage to the center hanger of the transmission shaft, it will cause an estimated loss to the vehicle. For this reason, the transmission parts should be inspected and adjusted during regular maintenance or warranty.