A hydraulic gear pump is a mechanical device designed to convert mechanical energy into hydraulic energy. Hydraulic pumps are used in braking systems, hydraulic systems, and transmission systems.
Though durable, hydraulic pumps aren’t supposed to last a lifetime. On average, a well maintained hydraulic pump can last 10k-50k hours of operation depending on a number of factors such as pump type, operating conditions, and how frequently the pump runs at its full capacity. If your hydraulic pump is too old or damaged and hydraulic pump repair cost is more than 50% of the market value of the pump, consider replacing it.
Causes of Hydraulic Pump Failure
Before hydraulic pump replacement, try to ascertain the cause of hydraulic pump failure by examining the internal components of your pump.
Mechanical Failure
Check the input shaft to see if it’s twisted or broken. A common reason for shaft damage is excessive shock load (often occurs when a relief valve is missing, damaged or not working properly). You’ll also want to inspect the pump for signs of fretting corrosion (occurs when two metal surfaces constantly rub against each other).
Cavitation
Check the reservoir to see if there is sufficient oil in it. All shut-off valves should be open and allow unrestricted flow. If your hydraulic pump broke down unexpectedly, you may be using the wrong type of inlet hose or the hose is the wrong size.
Contaminated Fluid
Contaminants such as dirt particles and metal shavings can wear internal components of a hydraulic gear pump faster, leading to premature failure. When too much water dissolves in hydraulic fluid, it can reduce the efficacy of the lubricant, and corrosion may occur. If air bubbles get trapped in hydraulic fluid, they can lead to cavitation.
Hydraulic Pump Replacement Tips
Choose the Right Hydraulic Pump
The wrong hydraulic pump can affect the performance of your hydraulic system or reduce its lifespan. When choosing a replacement pump, consider the flow and pressure specifications provided by the system manufacturer. Weigh the pros and cons of different types of pumps (gear vs vane vs piston) to select the right type of pump for your system.
Clean the System
Clean the hydraulic system before installing the new pump. Flush it and make sure the hydraulic fluid is free of contaminants. Replace the filters to prevent dirt from entering the new pump. Use the right hydraulic fluid (compatible with the new pump) and avoid underfilling or overfilling the system.
Mounting and Alignment
The new pump should be properly mounted and aligned with the motor or drive system as a misaligned pump can wear down system components prematurely. Tighten bolts and connections to prevent leaks.
Hydraulic.net offers a range of hydraulic pumps designed to meet diverse needs. Manufactured in a state-of-the-art facility, our pumps are built to last. To learn more, call (630) 543-7630.
