Excavator is a good helper in construction, in the process of use, because of a variety of reasons, there will be many problems, such as the common excavator movement slow, the bucket does not return, turn hard, high temperature. To this end, MF master to share the excavator action more and more slow, small throttle head, the slow use of large throttle, how to do the malfunction?
Classic old car Komatsu PC350-6 excavator, the machine work 10000 hours or so, last month was just taught by the master of the master opened two days, the hydraulic pump plants have broken two, and then simply changed two plants. With a month's action more and more slow, small throttle drag head, big throttle and slow.
The excavator moves slower and slower. What should we do if the throttle is dragging head and the throttle is slow?
Replace all the plants, a pump shaft wear and tear, to replace the lifting shaft and pump shell, wear the wear parts, flow and pressure, test, speed is much faster than before, a lot of power.
The master talked about the main reasons for the slower and slower movements of excavators.
Insufficient displacement of 1. main pump
2. system pressure is low
3. the throttle in the hydraulic system
An introduction to the more slow motion of the excavator:
1. the pressure of hydraulic oil has been adjusted to meet the requirements of the system standard value, and the reason of low system pressure is excluded.
2. the main pump is adjusted to increase the displacement of the main pump; then, the operation device makes the main safety valve overflow until the engine has just created the car, and then the excavator (empty) completes various movements to see if the speed is faster. Thus, the reasons for the shortage of the main pump are eliminated.
3. first check the oil pressure of the pilot oil road, test the pilot system pressure (lead system pressure requirements 3MPa), if not required, adjust the pilot relief valve, pressure failed to rise, will be from the pilot relief valve, not found the spool of the wear marks, thus the pilot pump leads to the leakage of the pilot system oil pressure, leading to the whole machine When the pilot pump is replaced, the hydraulic pressure of the pilot hydraulic system reaches 3MPa.
