new hydraulic hoses

New Hydraulic Hoses are Not Clean

New hydraulic hoses can be a significant source of contamination in hydraulic systems.  Even brand-new hoses are likely to contain residues or particles introduced as part of the manufacturing process.  It is crucial to clean the inside of hydraulic hoses before they are installed.

There are several ways that hoses can be cleaned including flushing with a compatible fluid, blowing compressed air through the hose, and mechanical devices. Each method has its advantages and disadvantages in terms of the time it takes to clean a hose and the cost of the equipment needed.

Sources of Hose Contamination

  1. Manufacturing Residue: During the manufacturing process of hydraulic hoses, various lubricants, oils, and other residues may be left behind. Despite efforts to clean them thoroughly, some residue may remain, especially in the inner lining of the hose.
  2. Storage Conditions: Hydraulic hoses are often stored in warehouses or facilities where dust, debris, and other contaminants may accumulate over time. Even if the hoses are packaged securely, some particles may still find their way inside.
  3. Transportation: During transportation from the manufacturing facility to the end user, hydraulic hoses can be exposed to various environmental conditions and handling processes. This transportation can introduce contaminants into the hoses, especially if they are not adequately protected.
  4. Handling during Installation: Sometimes, during the installation process, hoses can pick up contaminants from the environment or the hands of the individuals handling them. Even small particles can enter the hose, especially during cutting and fitting.
  5. Moisture: Moisture can also be a concern, as it can lead to corrosion and microbial growth inside the hose, especially if the hose is not properly sealed or if there are any defects in the manufacturing or storage process.

It is essential to clean new hydraulic hoses before installation to remove any potential contaminants. Flushing involves passing a compatible fluid through the hose to clean out any residue or particles that may be present. This helps ensure optimal performance and longevity of the hydraulic system.

Other Methods for Cleaning Hydraulic Hose

  1. Blowing with Compressed Air: Using compressed air to blow out any debris or contaminants from the hose can be effective. This method is often used with flushing to ensure thorough cleaning. Compressed air in conjunction with a projectile is also extremely effective for ensuring that all contaminants are removed. The Ultra Clean Technologies line of projectiles and launchers is a great example that can clean almost any hose size and configuration in seconds.
  2. Mechanical Cleaning Devices: There are specialized tools available designed to mechanically clean the inside of hydraulic hoses. These devices typically use brushes or other abrasive materials to scrub the inner surface of the hose and remove any buildup or contaminants.
  3. Chemical Cleaning: Chemical cleaning agents are used to dissolve or loosen stubborn residues inside the hose. However, it’s crucial to ensure that the cleaning agent is compatible with the hose material and the hydraulic fluid used in the system to avoid any damage or contamination.

It’s essential to follow manufacturer recommendations and guidelines when cleaning hydraulic hoses to avoid damaging the hose or compromising the performance of the hydraulic system. Additionally, proper handling, storage, and maintenance practices can help minimize the risk of contamination and ensure the longevity of hydraulic components.

If you have any questions or need some expert, friendly advice on which Ultra Clean Technologies system is the best for your application, contact McCormick & Associates today at 302-521-0125 or

Further Reading

Oil with visible contaminant particles