The four wheel area is very familiar to the drivers who deal with excavators every day. In general, the four wheel area is a vulnerable part. If it is broken or worn, it can be replaced directly.
It's easy to replace. The fear is that there is oil leakage in the tugboat. Oil leakage means finding the fault point, and the process of troubleshooting is not simple. Sometimes it takes money to dismantle and inspect.
The phenomenon is very obvious and simple. When the operator found that there was oil leakage (oil leakage) on the carrier roller, it directly fed back to the owner.
▊ if the tugboat runs for a long time and a long distance, oil leakage will occur on the tugboat. This situation needs careful observation and confirmation
▊ there is no doubt that there will be oil leakage if the drag chain wheel axle is worn.
▊ aging of drag chain wheel oil seal, basically we can understand the common reason is oil seal aging, which is also common in life.
In order to make the fault inspection results accurate, so the disassembly inspection and maintenance will be carried out.
1. Remove the supporting wheel from the X frame support, open the outer end cover, and separate the rotating wheel body from the inner stator;
2. Remove the floating oil seal, clean the corresponding position of the wheel body and stator with floating oil seal, and pay attention to no oil stain;
3. Install a new floating oil seal, add grease, reassemble the wheel body and stator, and install the end cover;
4. Put the repaired carrier roller back into the frame and run for about 5 minutes without oil leakage.
Cause of failure
After the detailed disassembly process, the cause of the fault is also very clear, which is caused by the damage of the floating oil seal inside the towing wheel.
This kind of problem is not accidental, users driving the excavator for a long time, long distance walking or dust into the oil seal will cause wear.
After all, the excavator is a giant made of steel. Although the four wheel area is not as expensive as the engine hydraulic pump, it can not be careless!
Therefore, if you walk for a long time and a long distance, you should carefully observe the status of the excavator and whether there is abnormal wear of the parts. In addition, grease lubrication and cleaning of the excavator should not be taken lightly!