The output flow of a piston pump may fluctuate for various reasons. Here are some possible causes and solutions: Pump wear: If the pump is worn, the output flow may fluctuate. In this case, the pump needs to be repaired or replaced. Air in the system: If there is air in the system, it will cause the output flow to fluctuate. Bleed the air out of the system and make sure there are no leaks. Clogged Filters: A clogged filter restricts the flow of hydraulic oil, causing output flow to fluctuate. Replace filter. Contamination in the system: Contamination in the system can cause the valve to stick, causing output flow to fluctuate. Flush and clean the system. Insufficient fluid supply: If the pump is not getting enough fluid, it can cause output flow to fluctuate. Check the fluid level and make sure the pump is receiving an adequate supply of fluid. Improper adjustment of the pressure relief valve: If the pressure relief valve is not adjusted properly, it will cause the output flow to fluctuate. Adjust the pressure relief valve to the correct setting. Worn Seals or Valves: Worn seals or valves can cause output flow to fluctuate. Replace seals or valves if necessary. 90R180-HF-5-NN-80-S-C-C8-J-03-NNN-35-35-24 90R180HF5NN80SCC8J03NNN353524 90-R-180-HF-5-EG-80-T-C-C8-J-03-NNN-35-35-28 90R180HF5EG80TCC8J03NNN353528 90R180-HF-5-EG-80-T-C-C8-J-03-NNN-35-35-28 90R180HF5EG80TCC8J03NNN353528 90-R-180-HF-5-EG-80-S-M-C8-H-03-NNN-42-42-24 90R180HF5EG80SMC8H03NNN424224 90R180-HF-5-EG-80-S-M-C8-H-03-NNN-42-42-24 90R180HF5EG80SMC8H03NNN424224 90-R-180-HF-5-EG-80-S-M-C8-H-03-NNN-35-35-24 90R180HF5EG80SMC8H03NNN353524 90R180-HF-5-EG-80-S-M-C8-H-03-NNN-35-35-24 90R180HF5EG80SMC8H03NNN353524 90-R-180-HF-5-EG-80-S-C-C8-J-03-NNN-35-35-24 90R180HF5EG80SCC8J03NNN353524 90R180-HF-5-EG-80-S-C-C8-J-03-NNN-35-35-24 90R180HF5EG80SCC8J03NNN353524 90-R-180-HF-5-EG-80-S-C-C8-H-03-NNN-42-42-28 90R180HF5EG80SCC8H03NNN424228 Insufficient driving power: If the pump does not get enough driving power, it may cause the output flow to fluctuate. Make sure the pump is receiving the correct amount of drive power. Improper installation: If the pump is installed improperly, it will cause fluctuations in the output flow. Check the installation and make any necessary adjustments. Displacement pump output flow fluctuations can be caused by a variety of factors, including: Worn or damaged parts: If a pump has worn or damaged pistons, cylinders, or valves, it can cause output flow to fluctuate. Contamination: Any contamination in the hydraulic fluid, such as dirt or debris, can cause pistons to stick or valves to clog, causing fluctuations in output flow. Air in the system: Air in a hydraulic system can cause cavitation and pressure fluctuations, which can cause flow changes. Temperature Changes: Temperature changes in hydraulic fluid can cause changes in viscosity, which can lead to flow fluctuations. Inadequate or Improper Filtration: Inadequate or improperly maintained filtration systems can allow contaminants to enter the system, causing flow fluctuations. To diagnose and resolve the problem, the following steps can be taken: Inspect the pump and hydraulic system for any visible signs of damage or wear. Check the hydraulic fluid for any contamination. Bleed all air from the hydraulic system. Monitor the temperature of the hydraulic oil and make sure it is within the recommended range. Check the filtration system and make sure it is properly maintained. Consider replacing any worn or damaged parts. If these steps do not resolve the problem, it may be necessary to consult a professional hydraulic technician for further diagnosis and repair. 90R180-HF-5-EG-80-S-C-C8-H-03-NNN-42-42-28 90R180HF5EG80SCC8H03NNN424228 90-R-180-HF-5-EF-80-T-C-F1-J-03-FAC-26-26-24 90R180HF5EF80TCF1J03FAC262624 90R180-HF-5-EF-80-T-C-F1-J-03-FAC-26-26-24 90R180HF5EF80TCF1J03FAC262624 90-R-180-HF-5-EF-80-T-C-C8-H-03-NNN-29-29-24 90R180HF5EF80TCC8H03NNN292924 90-R-180-HF-5-DE-80-T-C-C8-J-03-NNN-35-35-28 90R180HF5DE80TCC8J03NNN353528 90R180-HF-5-DE-80-T-C-C8-J-03-NNN-35-35-28 90R180HF5DE80TCC8J03NNN353528 90-R-180-HF-5-DE-80-S-C-C8-J-03-NNN-42-42-28 90R180HF5DE80SCC8J03NNN424228 90R180-HF-5-DE-80-S-C-C8-J-03-NNN-42-42-28 90R180HF5DE80SCC8J03NNN424228 90-R-180-HF-5-CD-80-T-M-F1-H-03-NNN-35-35-30 90R180HF5CD80TMF1H03NNN353530 90R180-HF-5-CD-80-T-M-F1-H-03-NNN-35-35-30 90R180HF5CD80TMF1H03NNN353530 To eliminate the fluctuation of the output flow of the plunger pump, the following measures can be taken: Check inlet conditions: Make sure the inlet filter is clean and the inlet line is not restricted or blocked. If the inlet line is restricted, it will cause cavitation and reduce the flow rate. Check Outlet Condition: Check the outlet line for any restrictions or blockages. A clogged outlet line can cause a sudden increase in pressure and decrease the flow rate. Check the condition of the pump: Check the pump for any wear or damage. Worn or damaged pistons, cylinders and valves can cause flow fluctuations. Check Hydraulic Oil: Check the condition and level of the hydraulic oil. If the fluid is low or contaminated, reduced flow rates and flow fluctuations may result. Check System Pressure: Check that the system pressure is within the recommended range. If the pressure is too high or too low, it will cause flow fluctuations. Check pump speed: Check that the pump speed is within the recommended range. If the pump runs too fast or too slow, it will cause flow fluctuations. Once the above steps are completed, the root cause of traffic fluctuation issues can be determined and appropriate corrective actions taken.