To remove air from a displacement pump, follow these steps: Make sure the pump is properly primed and there is enough fluid in the reservoir. Air may be trapped in the pump if the pump does not start or if there is not enough fluid in the system. Check for any air leaks in the system, such as loose connections or damaged hoses. Air can enter the system through leaks and cause problems. Cycle the pump slowly a few times to allow any air bubbles to escape from the system. This can be done by turning the pump on and off or by operating the pump handle multiple times. If the above steps did not remove all air, vent the system. This involves opening the bleed valve located on the pump or on nearby fittings to allow air to escape. Slowly cycle the pump with the valve open until all the air is expelled. After all the air has been expelled, close the bleed valve and check that the pump is operating properly. It is very important to check and remove air from the piston pump regularly to prevent damage and ensure proper operation. In addition to the steps above, here are some additional tips for removing air from a displacement pump: If the pump has a pressure relief valve, temporarily increase the pressure setting to help push any trapped air out of the system. Use a vacuum pump to remove air from the system. This involves connecting a pump to the system and using it to pump out any air bubbles. After removing the air, the vacuum pump can be disconnected. If the displacement pump is part of a larger hydraulic system, it may be necessary to bleed air from components other than the pump, such as valves and cylinders. 90-L-100-KA-1-BC-60-S-3-S1-F-00-GBA-30-30-30 90L100KA1BC60S3S1F00GBA303030 90-L-100-KA-1-BC-61-P-3-F1-E-00-GBA-35-35-24 90L100KA1BC61P3F1E00GBA353524 90-L-100-KA-1-BC-80-L-3-C7-E-04-GBA-29-29-20 90L100KA1BC80L3C7E04GBA292920 90-L-100-KA-1-BC-80-L-3-F1-E-03-GBA-35-35-24 90L100KA1BC80L3F1E03GBA353524 90-L-100-KA-1-BC-80-L-4-S1-E-03-GBA-35-35-24 90L100KA1BC80L4S1E03GBA353524 90-L-100-KA-1-BC-80-P-3-S1-D-05-GBA-29-29-24 90L100KA1BC80P3S1D05GBA292924 90-L-100-KA-1-BC-80-P-3-S1-F-00-GBA-42-42-24 90L100KA1BC80P3S1F00GBA424224 90-L-100-KA-1-BC-80-P-4-F1-E-00-GBA-32-32-24 90L100KA1BC80P4F1E00GBA323224 90L100-KA-1-BC-80-R-3-F1-E-03-GBA-35-35-24 90L100KA1BC80R3F1E03GBA353524 90-L-100-KA-1-BC-80-R-3-F1-E-03-GBA-35-35-24 90L100KA1BC80R3F1E03GBA353524 If air is still an issue after performing these steps, you may want to have the system checked for leaks or other issues by a professional technician. By following these steps and tips, you can effectively remove air from your displacement pump and ensure it runs at optimum efficiency. It is also important to check the level and condition of the hydraulic oil regularly, as low or contaminated oil can cause air to enter the system. When starting a new or rebuilt pump, it is important to prime the pump with hydraulic oil before starting it. This can be done by filling the pump with hydraulic oil and turning the input shaft slowly by hand to help expel air bubbles. In some cases it may be necessary to run the pump briefly with the outlet open to allow any remaining air to escape. Patience and persistence are important when attempting to expel air from a displacement pump. It may take several attempts to completely remove all air from the system. By following these additional tips, you can further improve the venting efficiency of your piston pump and ensure the long-term reliability of your hydraulic system. If the displacement pump is equipped with a vent plug or bleed screw, loosen it to allow any trapped air to escape while the pump is running. After all the air has been expelled, tighten the plug or screw the screw back in place. When filling a pump with hydraulic fluid, it is important to ensure that the fluid is free of air bubbles. This can be done by slowly pouring fluid into the pump and allowing it to settle before topping it up to the proper level. In some cases, it may be necessary to tilt the pump slightly to allow trapped air to escape the system. This can be done by loosening the pump mounting bolts and tilting the pump slightly to one side while running the system. 90-L-100-KA-1-BC-80-R-3-S1-E-00-GBA-14-14-24 90L100KA1BC80R3S1E00GBA141424 90-L-100-KA-1-BC-80-R-3-S1-E-09-GBA-35-35-24 90L100KA1BC80R3S1E09GBA353524 90-L-100-KA-1-BC-80-R-3-S1-F-00-GBA-38-38-24 90L100KA1BC80R3S1F00GBA383824 90-L-100-KA-1-BC-80-R-4-F1-E-03-GBA-35-35-24 90L100KA1BC80R4F1E03GBA353524 90-L-100-KA-1-BC-80-R-4-F1-F-03-GBA-38-38-24 90L100KA1BC80R4F1F03GBA383824 90-L-100-KA-1-BC-80-R-4-S1-E-03-GBA-26-26-20 90L100KA1BC80R4S1E03GBA262620 90-L-100-KA-1-BC-80-R-4-S1-E-03-GBA-35-35-24 90L100KA1BC80R4S1E03GBA353524 90-L-100-KA-1-BC-80-R-4-S1-E-04-GBA-26-26-20 90L100KA1BC80R4S1E04GBA262620 90L100-KA-1-BC-80-R-4-S1-F-03-GBA-35-35-30 90L100KA1BC80R4S1F03GBA353530 90-L-100-KA-1-BC-80-R-4-S1-F-03-GBA-35-35-30 90L100KA1BC80R4S1F03GBA353530 If the displacement pump is equipped with a sight glass or dipstick for checking the oil level, make sure the oil level remains within the recommended range to prevent air from entering the system. By following these extra steps and precautions, you can ensure your piston pump is air-free and running at peak efficiency. Check the system for leaks as air may enter the pump through leaks. Make sure all fittings, hoses and connections are tight and properly sealed. Check for clogged or damaged inlet filters, as clogged filters can allow air to enter the system. Replace filter if necessary. If you still have air problems with the pump after performing these steps, you may need to consult a professional for further troubleshooting and maintenance.