The four-wheel belt is very familiar to the old drivers who deal with excavators every day. Generally, the four-wheel belt is a vulnerable part. If it is broken or worn out, you can just ask the boss to replace it.
It is easier to replace with a new one. The most feared thing is the oil leakage of the drag sprocket. Oil leakage means that the fault point must be found. The process of troubleshooting is not simple, and sometimes it is even necessary to ask a master to disassemble and inspect at a high price.
Symptoms:
The phenomenon is obvious and simple. The operator found the oil leakage (oil leakage phenomenon) of the supporting sprocket and directly reported it to the owner.
Fault analysis:
When driving for a long time and a long distance, the drag sprocket will leak oil. This situation needs to be carefully observed and confirmed by everyone.
The drag chain wheel shaft is worn, and there is no doubt that there will be oil leakage if there is wear.
The oil seal of the drag chain wheel is aging. Basically, the common reason that everyone can understand is the aging of the oil seal, which is also the most common in life.
Troubleshooting
In order to make the fault inspection results more accurate, the maintenance master carried out disassembly inspection and maintenance. Here, the editor will also teach you the detailed disassembly process, hoping to bring you a reference.
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 positions of the wheel body and the stator floating oil seal, and be careful not to have any oil stains;
3. Install a new floating oil seal, add butter, reassemble the wheel body and stator, and install the end cover;
4. Put the repaired supporting sprocket back into the frame, and run it dry for about 5 minutes to make sure there is no more oil leakage.
  cause of issue
After a detailed disassembly process, the cause of the failure became clear. It was caused by damage to the floating oil seal inside the drag chain wheel.
This kind of problem is not accidental. The user drives the excavator for a long time, long-distance walking or dust enters the oil seal, which will cause wear and tear.
  Kind tips:
After all, the excavator is a giant made of steel. Although the four-wheel belt is not as expensive as the hydraulic pump of the engine, it must not be careless!
Therefore, when walking long distances for a long time, everyone must carefully observe the state of the excavator and whether the parts are worn abnormally. In addition, the excavator must not be taken lightly when lubricating and cleaning the excavator!