Release Time: 2020-12-24
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Third: Main safety valve; if the main safety valve is stuck or severely worn, the middle arm will also fall off and the recovery will be difficult.
Fourth: Internal failure of the hydraulic pump; if all the above-mentioned failure points have been checked, a thorough overhaul of the hydraulic pump is imminent, because every year a large number of arm failures are caused by internal problems in the hydraulic pump.
There are two reasons for this failure phenomenon that everyone can learn from and think about.
The first is that when a failure occurs, don't hesitate or delay, take the time to stop and start overhauling, so that the failure will not be enlarged due to time delay.
The second is that the maintenance process must follow a simple to complex process, and check one by one according to the analysis reasons! And some faulty parts cannot be repaired to continue working, so they must be replaced immediately!