Excavator accessories 709-20-51800 main gun auxiliary gun relief valve

Failure caused by the safety valve
Hydraulic tubing burst, cylinder lever bent. The main reason is that the safety valve is artificially adjusted, and some digging friends in order to improve the overall working force of the excavator, adjust the pressure setting value of the main relief valve and the safety valve to increase the strength of the excavator. However, in doing so, under the long-term high pressure operation of the excavator, the probability of the hydraulic tubing bursting will increase, and even the cylinder lever will bend because it can not withstand the huge pressure.
Due to the failure of the safety valve, the spool is stuck, or the oil is blocked at the overflow port, which will lead to low pressure, affecting some actions, insufficient power, and slow action. At this time, some digging friends will adjust the pressure of the main relief valve, and the adjustment pressure will not rise. The cause of the failure is likely to be a problem with the safety valve, so the safety valve should be checked immediately.
Since the performance of the excavator in normal operation is not directly affected by the safety valve, the safety valve is often ignored in the excavator. In this reminder, in the maintenance process of the excavator, the safety valve should also remember to check, once the safety valve is found to have wear and other faults, it must be replaced with a new safety valve in time