The drive axle is an important part of the wheel loader. It carries vertical, longitudinal and lateral forces, as well as braking moments and reaction forces, acting between the road surface and the frame or body. The drive axle is generally composed of the main reducer, the differential, the wheel transmission device and the drive axle housing. Due to improper operation or maintenance of the loader, it is prone to failure.
There are many reasons for the abnormal sound of the drive axle, which may be gear problems, or bearings, or problems with the differential. The specific reasons are analyzed in detail.
Possibility 1: The meshing clearance of the main drive gear is improper. Excessive meshing clearance or too small meshing clearance will cause abnormal sound.
The treatment method is to remove the main transmission mechanism and re-adjust the gear meshing clearance.
Possibility 2: Improper bearing clearance. When the bearing clearance is too small or the bearing clearance is too large, there will be messy noises.
The treatment method is to remove the main transmission mechanism and readjust the bearing clearance.
Possibility 3: The differential is abnormal. If the planetary gear and the cross shaft are stuck, there will be an abnormal sound, which usually occurs when turning; the sound of the poor meshing of the planetary gear is more complicated, and the higher the machine speed, the louder the noise.
The treatment method is to remove the main transmission mechanism and replace the cross shaft or planetary gear.
After the machine is running or running for a period of time, if you touch the axle housing, if it feels hot, the drive axle is overheated. The main reason is that the bearing clearance and gear meshing clearance are too small and lack of lubricating oil.
The treatment method is to first check whether there is a lack of lubricating oil. If there is no shortage of oil, the main drive should be removed, and the bearing clearance or gear meshing clearance should be checked and adjusted.
Oil leakage occurs when gear oil seeps out at the connection between the main drive and the axle housing and on the inside of the hub reducer when the machine is running or stopped. The oil leakage at the connection between the main drive and the axle housing is caused by loose bolts or damage to the asbestos paper gasket; the oil leakage inside the hub reducer is mainly caused by the damage of the double-port skeleton oil seal or the “O” ring. The treatment method is to replace the double lip skeleton oil seal or asbestos paper pad.