It is essential to operate excavators for routine maintenance and troubleshooting. I learned before that many excavators don't know how to solve some common faults, such as the weak performance of excavator distribution valve in work. Here in Komatsu excavator overhaul plant, master Lei sorted out some knowledge questions and answers about the weak work of excavator distribution valve, hoping to solve the problems for the masters!
1. The engine has sufficient power and operates normally, while the excavator distribution valve operates slowly and the excavation is weak.
2. The hydraulic pump of the excavator distribution valve is mostly a variable piston pump. After working for a certain time, the internal parts of the pump are inevitably worn, resulting in internal leakage, and the parameter data are inconsistent, resulting in insufficient flow, high oil temperature, slow speed, unable to establish high pressure, so the action is slow and weak. For such problems, it is necessary to remove the hydraulic pump for data measurement, confirm the problem, replace the accessories that cannot be used anymore, or repair the accessories that can be used again. After reassembly, it is necessary to conduct bench commissioning and match the parameters of each circuit (pressure, flow, power, variables, etc.).
3. An important hydraulic component on the excavator distribution valve - multi-channel distribution valve, which has main safety valve, secondary valve, overflow valve, oil makeup valve, etc. If the pressure set by these valves does not reach the standard pressure, the excavator will be unable to work.
The above briefly summarizes several common reasons for the inability of the excavator distribution valve, and finally reminds all machine operators that when the excavator is found to have a failure of the distribution valve, users need to timely notify professional excavator maintenance personnel for troubleshooting and repair, so as to ensure that the excavator can be used normally.
