After all, the excavator is assembled from multiple steel parts, so the long working hours and the maintenance work are not done. It is easy to have various abnormal sounds. For the abnormal noise problem of excavators, many old drivers deal with the same. A Komatsu PC850-8 excavator, the owner consulted "I have a Komatsu 205 excavator. At the beginning, the machine was moving slowly on the side, there was wear and tear on the inside, replace the hydraulic pump valve plate, valve plate shell seat Pump bile, after installation and test run, the bubbles are serious and there is abnormal noise.After that, the shaft head oil seal is replaced, the fan pump is removed from the engine gear chamber, and the two oil pipes connecting the fan pump to the oil pipe are blocked with plugs. Better, but there are still a few bubbles?
The Komatsu excavator was slow on the side, and there was abnormal noise after repairing the pump
Basic information of Komatsu PC850-8 excavator
Equipment brand: Komatsu
Device model: PC850-8
Working time: 8000 hours
Analysis of Komatsu excavator's slow side and abnormal noise after pump repair:
If you exclude the cause of the fan pump, pay attention to a few points;
1. The spindle oil seal is double-sided.
2. Check whether the return pipe of the pump is leaking.
3. Pilot pump seal.
After confirming that there is no problem, press the pump to start the engine, and do not act. After confirming that the oil is sucked, turn off the engine. After there are no bubbles in the fuel tank, restart the engine and check if there are any bubbles in the fuel tank. Then, if there is no air bubble when restarting the engine, there will be no problem. After the action, it will settle again. If the air bubble does not decrease, it must be carefully checked. The pump should not be continuously operated just after it is installed, otherwise there is no way to determine the cause.
