Maintenance of hydraulic pumps

Hydraulic pump is a kind of hydraulic component that provides pressurized liquid for hydraulic transmission. Its function is to convert the mechanical energy of power machines (such as electric motors and internal combustion engines) into pressure energy of liquids. Here is a working principle of a single plunger pump: the cam is driven by a motor to rotate. When the cam pushes the plunger to move upward, the sealing volume formed by the plunger and the cylinder body is reduced, and the oil is squeezed out of the sealed volume and discharged to the required place through the check valve.


When the cam rotates to the lower part of the curve, the spring forces the plunger downward to form a certain degree of vacuum, and the oil in the fuel tank enters the sealed volume under the effect of atmospheric pressure. The cam continuously raises and lowers the plunger, the sealing volume is periodically reduced and increased, and the pump continuously sucks and discharges oil.


Maintenance and maintenance of hydraulic pumps:


Check the fasteners of the product daily, such as whether the screws are loose, and check whether there is any oil leakage in the installation pipe connections.


Check the cleanness of the oil seal. Oil seals need to be cleaned frequently to prevent affecting the service life of the machine.


It is recommended to replace the hydraulic oil after the first 500 hours of operation. The maximum interval for hydraulic oil replacement is 2000 hours, and the maximum replacement cycle with air filter is 500 hours.


In order to optimize the service life of hydraulic components, please replace the hydraulic oil and filter regularly. Hydraulic pollution is the main cause of damage to hydraulic components. Keep the hydraulic oil clean during routine maintenance and repairs.


In daily use, check whether the oil level of the hydraulic oil tank meets the requirements, and check the water content of the hydraulic oil and whether there is any abnormal smell. When the hydraulic oil contains water, the oil is cloudy or milky, or water droplets settle at the bottom of the tank. When the oil has a foul odor, it indicates that the operating temperature of the hydraulic oil is too high. When the above situation occurs, please replace the hydraulic oil immediately, and find out the cause of the problem and solve it. Check the vehicle daily for leaks.


During trial operation and operation, the axial plunger pump element must be filled with hydraulic oil and exhaust air. After a long period of downtime, oil filling and venting operations are required because the system may drain oil through the hydraulic lines.


Pollution can cause fatal damage to hydraulic components. Ensure that the working environment for maintenance and repair is clean. Before starting maintenance or repairs, thoroughly clean the pump or motor.



Post time: Dec-23-2020