1. First, check the hydraulic system leakage of digger oil leakage:
The general digging machine is produced after a long period of use. In some cases, the pit excavator seal will fail, be damaged, or the surface of the extrusion or the sealing surface be strained. The main reasons for this are:
Oil contamination, improper sealing surface roughness, unacceptable sealing grooves, loose fittings, increased gaps in fittings, high oil temperatures, poor sealing ring assembly, etc. Leakage is divided into internal leakage and external leakage. Usually the failure is mainly caused by internal leakage.
2. Remove the tubing, remove the body valve stem, stem and related parts of the digging machine, clean the oil gallery, and blow it dry with compressed air.
3. Treatment of Leakage Failure in Digger This part of the internal leakage is mainly caused by leakage in the boom slide valve and cylinder. Internal leakage mainly occurs inside the valve body and the cylinder, so it is not easy to check. However, we can use some helper methods to determine the leak.
Summary: Inspection of the digging arm boom cylinder When the boom cylinder piston receives the bottom, remove the rodless cavity tubing, so that the boom cylinder rod cavity continues to be filled with oil. If there is a large amount of working oil leaking out of the rodless tubing port, it means that the hydraulic cylinder has internal leakage; if the boom sinking speed is significantly faster at this time, it also means that the internal leakage occurs in the hydraulic cylinder; if the subsidence speed change is not obvious, the internal The reason for the leakage is in the boom slide valve.
The general digging machine is produced after a long period of use. In some cases, the pit excavator seal will fail, be damaged, or the surface of the extrusion or the sealing surface be strained. The main reasons for this are:
Oil contamination, improper sealing surface roughness, unacceptable sealing grooves, loose fittings, increased gaps in fittings, high oil temperatures, poor sealing ring assembly, etc. Leakage is divided into internal leakage and external leakage. Usually the failure is mainly caused by internal leakage.
2. Remove the tubing, remove the body valve stem, stem and related parts of the digging machine, clean the oil gallery, and blow it dry with compressed air.
3. Treatment of Leakage Failure in Digger This part of the internal leakage is mainly caused by leakage in the boom slide valve and cylinder. Internal leakage mainly occurs inside the valve body and the cylinder, so it is not easy to check. However, we can use some helper methods to determine the leak.
Summary: Inspection of the digging arm boom cylinder When the boom cylinder piston receives the bottom, remove the rodless cavity tubing, so that the boom cylinder rod cavity continues to be filled with oil. If there is a large amount of working oil leaking out of the rodless tubing port, it means that the hydraulic cylinder has internal leakage; if the boom sinking speed is significantly faster at this time, it also means that the internal leakage occurs in the hydraulic cylinder; if the subsidence speed change is not obvious, the internal The reason for the leakage is in the boom slide valve.
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