How to replace the hydraulic pump vane pump core

2. Check the motor shaft and bearing deformation and wear, such as the shaft swing phenomenon should confirm whether the shaft deformation or bearing wear and tear, prevent the motor due to affect the life of the pump.

3. Check the coupling for wear and tear. After the pump is installed, the shaft of the pump is concentric with the motor shaft. The simple method is to rotate the coupling by hand (for example, using a plug-in motor, you can manually turn the cooling fan on the rear of the motor) Feel uniform and flexible.

4. Before starting the motor check the tank of hydraulic oil is clean enough, the filter is deformed clean, it is recommended to completely clean the fuel tank, replace the standard of new hydraulic oil and filter.In order to prevent the phenomenon of burning pump, be sure to start before the pump The body is filled with hydraulic fluid; loosen the exhaust valve of the oil pump outlet (if there is no exhaust valve will slightly loose the joints of the oil pump outlet) in order to exclude the air inside the pump body and the pipeline, Perform a jogging start, after normal operation (no bubbles pop up) and then tighten the exhaust valve or outlet connector.

5. In the process of oil pump should pay attention to the oil level, oil temperature, the use of pressure and other compliance requirements, the normal work of the oil level generally higher than the top of the filter 50mm above, otherwise the pump is easy to absorb air and produce noise, The best oil temperature can be controlled below 60 degrees Celsius, to prevent the oil temperature is too high and destroy the friction surface to form their own protective film.

6. When replacing the pump core check the positioning hole in the pump casing is deformed, the shaft spline and pump core spline with the part of the wear and tear deformation, such as positioning hole deformation or shaft key wear and tear of the user is advised to replace the entire pump.

7. Check the shaft seal (skeleton oil seal) is aging deformation, bearing wear and tear is loose (recommended to replace the new shaft seal and bearing), replacement should be careful, it is recommended to use the same diameter and shaft seal (shaft seal) Larger than the bearing diameter, the inner diameter slightly larger than the outer diameter of the shaft (bearing) of the flat hard to send them to a fixed position to prevent the shaft seal deformation and damage to the bearings.

8. Check the new and old pump core models, the working direction is the same, confirm before installing, before installing the pump casing wall cleaning, plus lubricating oil reloading pump core, installation, such as the pump core can not be very smooth in place to check Pump core stator and oil pan is concentric, adjust the concentricity after installation, after installation to confirm the pump pin is fixed in the pump housing positioning hole, check the ring is complete, smooth. To prevent trimming of the seal, tighten the pump housing connection screw taper angle should be uniform.

9. To adjust the direction of the oil inlet and outlet of the pump, just unscrew the fixed screw of the pump housing, rotate the upper pump housing and rotate the required position to tighten the screw; do not pull the pump core to avoid the pin Displacement of the pump housing positioning hole or the upper and lower casing at the junction of the seal dislocation.

10. Install the pump first check the oil inlet and outlet flange seals and do any pipe deformation (best to replace the new), and should clean the inner wall of the oil pipe dirt, check the oil pipeline connections The sealing performance .