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Hydraulic systems are integral to various industrial applications, allowing for efficient power transmission and movement. However, pressure loss in hydraulic circuits can lead to decreased performance, inefficient operation, and potential equipment damage. This article outlines the key steps to troubleshoot hydraulic pump pressure loss, particularly in high-flow hydraulic circuits.
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Start by understanding the signs of pressure loss in your hydraulic system. Common indicators include reduced lifting capacity, slower operation of actuators, unexpected drops in pressure readings, and increased fluid temperatures. Addressing these symptoms early can prevent further complications.

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Check the Fluid Level and Quality: Low hydraulic fluid levels can result in inadequate pressure generation. Inspect the reservoir to ensure it is filled to the recommended level. Additionally, assess the quality of the hydraulic fluid; contaminated or degraded fluid can drastically impair system performance.
Inspect Filter Condition: Hydraulic filters protect the system by removing contaminants. A clogged filter can restrict fluid flow, leading to pressure loss. Regularly inspect and replace filters according to the manufacturer’s recommendations to maintain optimal flow rates.
Examine the Hydraulic Pump: The hydraulic pump is critical in generating the necessary pressure. Inspect the pump for signs of wear or damage, such as leaks or unusual noises. If the pump is malfunctioning, it may require repair or replacement.
Evaluate System Components: Analyze hoses, fittings, and valves for any leaks, wear, or obstructions. A damaged or improperly connected hose can lead to significant pressure drops. Pay attention to connectors that may have loosened over time, as they can also cause leaks.
Perform a Pressure Test: Utilizing a hydraulic pressure gauge, you can measure the actual output pressure of the pump under operational conditions. This test will help identify if the pump is performing within its specifications or if there’s a noticeable drop.