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4 Reasons Behind Hydraulic System Failure

- Dec 23, 2017 -

Hydraulic Fluid Contamination

A leading cause of many hydraulic pump failures is hydraulic fluid contamination. It is very important to ensure that both components and fluids are clean prior to use. Fluid contamination forces hydraulic pumps and valves to wear prematurely resulting in hydraulic system failures and damaged system components. Read our article, Three Ways to Improve the Life-Span of Hydraulic Machinery, to learn how to prevent this common hydraulic mishap.


Over-heating a hydraulic hose can cause thermal expansion which can in turn cause premature aging of the elastomers and plastics within the material that comprises the internal hose tube.  This condition leads to decreased elongation of the molecular structure of the material and contributes to increased brittleness eventually leading to premature hose failure.

General Abrasion

While many hose manufacturers produce anti-wear covers that include enhanced abrasion resistance characteristics, the hose assemblies must be installed in a manner that minimizes contact with other components in the system.  They must also be clamped appropriately to ensure that they do not rub against other hoses or mechanical components during use. Improper installation of hose assemblies leading to excess abrasion will cause premature hose failure.

Incorrect Insertion Depth

When a hose assembly is not properly assembled, it can create a very dangerous situation. In fact, the most likely cause of hose assembly failure is a result of improper assembly rather than from manufactured defects.  One of the most common assembly mistakes is caused by fittings that are not inserted to the proper insertion depth within the hose.  When the crimp fitting is not inserted completely, the surface area where the crimp ferrule is clamped to the hose is reduced thus compromising the connection and leading to a condition where the fitting blows off the hose under pressure exposing the machine operator to a dangerous condition that could lead to serious injury.  

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