Hydraulic oil


Keep your equipment
running newer, cleaner and longer


For a Hydraulic fluid case study, conduct a before and after lab analysis to diagnose the status of the fluid and create a baseline ISO 4406 particle count with normal setup vs. having our oil cleaner installed. As you see below, the removal of particles is quite dramatic.

Metal particles continuously multiply in hydraulic systems.  As metal flows through the system at high speed and pressure it causes a very abrasive result to pumps, valves, seals and cylinders.

Metals also act as a catalyst and accelerate the oxidation of the oil.  Oxidation takes place when the antioxidant additives are neutralized by the formation of acids.

The smallest 5 micron particles are the most damaging because they can fit through very tight tolerances and continue to cause wear.  Servo valves and pumps have critical clearances of 1 to 10 microns and are very sensitive to wear from fine debris particles.

Dirt particles also get in through tank breathers, cylinder seals and other access points.  Condensation from temperature changes and leaking oil cooling systems contaminate oil with water.  This combination of metal particles, water and oxygen at high temperatures will oxidize the oil more rapidly.

During the oxidation process, polymerization causes adhesive molecular structures, which turn into sludge.  This resinous sludge, or varnish, is a dark color and leaves deposits on many parts within the hydraulic system.


Hydraulic Oil Install

Transmission and Hydraulic Oil Cleaners



  Much Cleaner Hydraulic Oil in 5 Months



  6 Micron Particles Cleaned from 40301 to 45 ppm


Fresh Hydraulic fluid is contaminated and typically contains more than 75,000 solid particles larger than 5µ per 100ml.  Pumps, valves, pipes, hoses, heat exchangers and oil tanks all introduce dirt into the system.  This debris accumulates in the system causing wear and the production of more wear particulate throughout.

Replacing the oil from the reservoir alone does not remove a majority of the particles, they are still present throughout the lines, pumps and cylinders.  Since the system is always introducing more dirt, the idea of changing oil to keep a system clean is not enough, but a continuous oil polishing system that keeps up with the removal of harmful contaminants at all times will keep your equipment running newer, cleaner and longer.