How to solve the phenomenon of gear oil pump not discharging oil or discharging oil less

How to solve the problem of not draining or draining less oil?

The diagnosis of faults in gear oil pumps is a crucial step during use. The following are the reasons and troubleshooting methods for gear pump inspection:

1. The rotation direction is incorrect.

2. The valve is not open.

3. The suction pipe has not entered the oil.

4. Inhalation altitude is too high to exceed the frontal value.

5. The suction end filter has too little capacity.

6. Air leakage in the suction pipe.

7. The temperature of the liquid is low and the viscosity increases.

The exclusion method is as follows:

1. Forward and backward directions.

2. Open the valve.

3. Check the oil suction pipe and immerse it into the oil surface.

4. Measure the pressure at the suction end

5. Replace the filter and increase the filter area.

6. Check the joint and seal it with sealing material.

7. Preheat the liquid. If preheating is not possible, reduce the pressure or decrease the oil discharge.