The action of the excavator boom is one of the most frequently used actions in the daily construction process. If the boom has problems such as slow and weak lifting, it is basically declared that it needs to be stopped for repair. Online sharing the solutions to the weakness of the boom.
Excavator boom unable to repair:
1 check the oil circuit for blockage
Remove the oil pipe, remove the boom spool valve body, valve rod and related components for cleaning, clean the oil passage and blow dry with compressed air.
2. Check the oil leakage
The leakage of hydraulic system usually occurs after using for a period of time. From the surface phenomenon, it is mostly caused by the failure, damage, extrusion of seals or the stretching of sealing surface The main reasons are: oil pollution, improper sealing surface roughness, unqualified sealing grooves, loose pipe joints, increased clearance of mating parts, high oil temperature, deterioration of sealing rings or poor assembly, etc. leakage is divided into internal leakage and external leakage, and usually the fault is mainly caused by internal leakage.
3. Treatment of internal leakage fault
The internal leakage of this part is mainly caused by the internal leakage of boom spool valve and cylinder. The internal leakage mainly occurs in the valve body and cylinder, which is not easy to check. However, we can use some auxiliary methods to judge the leakage.
4 inspection of boom cylinder
When the piston of the boom cylinder is fully retracted, remove the oil pipe without rod chamber, so that the rod chamber of the boom cylinder continues to be filled with oil If a large amount of working oil leaks out of the oil pipe port of the rodless chamber, it indicates that the hydraulic cylinder has internal leakage; It can also make the bucket full of load, lift it to the limit position, put the boom control lever in the middle position, shut down the engine, and observe the sinking speed of the boom; Then, place the boom control lever in the rising position. If the boom sinking speed is significantly accelerated at this time, it also indicates that the internal leakage occurs in the hydraulic cylinder; If the sinking speed does not change significantly, the internal leakage is caused by the boom spool valve.
By the end of this article, I believe you have a new understanding of the failure of the weak action of the boom. After all, this failure can often be encountered in real construction operations, and the inspection process takes time, not to mention, it is also difficult to maintain, so this requires the professional maintenance engineer Fu of the excavator to solve it for us, so as to ensure the orderly construction progress!
