Recently, in view of the slow working speed of excavators, technical experts pointed out after in-depth study that the main reason is the decline in engine power and the internal leakage of the hydraulic system caused by the wear of each part of the whole machine. Experts said that the excavator, as a heavy construction machinery, its hydraulic pump as the core component, will inevitably produce wear after a long time of work.

It is understood that the hydraulic pump of the excavator usually uses the plunger variable pump. With the increase of working time, the hydraulic components inside the pump such as the cylinder block, the plunger, and the flow plate will appear excessive wear, which will cause the internal leakage phenomenon. This not only leads to the uncoordinated parameters of the hydraulic system, but also causes the problems of insufficient flow and too high oil temperature, which is finally manifested as the slow working speed of the excavator.

For this kind of problem, experts suggest that when the working speed of the excavator slows down, it is first necessary to check whether the circuit fuse is open or short circuit to ensure that the circuit system is normal. At the same time, checking whether the pilot pressure is normal, and whether the servo control valve and servo piston are stuck is also an important step in troubleshooting.

If the above inspection fails to solve the problem, then the hydraulic pump may need to be disassembled and data measured to confirm the fault. After confirming the problem, it is necessary to repair or replace the parts that have exceeded the wear limit to restore the normal working condition of the excavator.

Experts remind that the daily maintenance and maintenance of excavators is crucial to extend their service life and maintain work efficiency. Users should regularly inspect and maintain the excavator to avoid big failures caused by small problems.