Failure reason of hydraulic system losing pressure (two)      

There are many instances of component damage. The causes of the weak action of the hydraulic machinery are usually caused by the system loss of pressure, and there are usually 3 reasons for the system loss of pressure:

3. Leakage of hydraulic components

The hydraulic component is damaged and the leakage is serious, which leads to the unloading of the oil circuit and the normal pressure can not be established. When this fault occurs, it usually appears as a fault. One or more mechanisms are difficult to move, while others are normal. The performance of the fault is related to the handle, so the structure and working principle of the oil circuit should be understood first, or the professional maintenance personnel should be treated.

4, after the replacement of hydraulic pump matters needing attention

After changing the hydraulic pump, the throttle of engine can not be increased immediately, and the performance of the hydraulic pump is tested by using high speed. Because there are a lot of reasons of lack of oil or oil pressure is too low, can not completely rule out the fault circuit is blocked or the local unloading, between the new pump components within the gap than the old pump is small, if suddenly the high-speed rotating hydraulic pump, is likely to be a "fried pump" accident. Therefore, after the replacement of new pumps should be in the medium speed throttle test machine, if the work and change the pump before the difference is not big, you should exclude other faults, to confirm the normal oil road, you can properly increase the throttle to test machine work.