After all, the excavator is assembled by several steel parts, so it is easy to make all kinds of abnormal noises after long working hours and poor maintenance. For the problem of abnormal noise of excavators, many old drivers deal with it in much the same way. A Komatsu pc850-8 excavator started with a slow motion on one side of the machine, which was worn and strained when opened. The valve plate, valve plate shell seat and pump liner of the hydraulic pump were replaced. After installation and commissioning, serious bubbles and abnormal noise occurred. Then, the shaft head oil seal was replaced, the fan pump was removed from the engine gear room, and the two oil pipes connecting the fan pump to the oil inlet pipe were plugged with plugs. The commissioning effect was better than before, but there were still a few bubbles?
Komatsu excavator is slow at one side and makes abnormal noise after repairing the pump
Basic information of Komatsu pc850-8 excavator
Equipment brand: Komatsu
Equipment model: pc850-8
Working hours: 8000 hours
Cause analysis of Komatsu excavator's abnormal noise after pump repair due to its slow operation:
If the cause of fan pump is eliminated, pay attention to several points;
1. The main shaft oil seal is double-sided.
2. Check whether the oil return pipe in the upper volume of the pump leaks.
3. Pilot pump seal.
After confirming that there is no problem, press the pump to start the engine, and do not act Turn off the engine after confirming that there is no bubble in the oil tank, and then start the engine to check whether there are bubbles in the oil tank. If there are fewer bubbles, turn off the engine again. If there are no bubbles, then start the engine again. If there are no bubbles, there is no problem. After doing the action, sink again If air bubbles do not decrease, they should be carefully checked Do not operate continuously when the pump is just installed, otherwise there is no way to judge the cause.
