Hydraulic Fluid and Condition Monitoring

Once your hydraulic oil is in the system, no matter what type it is, you MUST keep it CLEAN!

ISO 4406 Cleanliness Codes

Oil cleanliness is measured by an international standard: ISO 4660 followed by 3 numbers in sequence. These numbers are coded. For example, ISO 4660 Code 24/21/18 which is typically the cleanliness of new oil straight out of a drum, shown on the slide below.

Explore Oil Clean Guide

Our mobile on-site testing solutions

Statewide Hydraulics can test on-site oil cleanliness levels using our state of the art Hydac FCU particle count tester.

Based on the results and the type of system you are running will recommended to:

  1. Re-use the existing oil
  2. Clean the hydraulic fluid using our portable oil cleaner
  3. Replace the oil with a product from our Gulf Western Oil

Request our technician for your site today, Call 03 9460 2377

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Types of fluid and properties required

  • Petroleum based oil
  • Water Glycol
  • Vegetable based fluid
  • High viscosity index fluids (HVI)
  • Fire retardant fluids
  • Operating temperature

Contact our team for expert advice today! Call 03 9460 2377

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Statewide Hydraulics

19 Tuscan Ct, Thomastown VIC 3074


03 9460 2377



Opening Hours:

7:30am – 4pm

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