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Mobil Serv Hydraulic Particles Test Kit

Product Number: DS-K3

For testing: Oil Insolubles, Particle Contamination

Hydraulic Particles Test Kit Data Sheet

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The Mobil ServSM Hydraulic Particles Test Kit provides a rugged patch test apparatus that is reliable and easy to use on-site with industrial, fleet, marine and off-highway equipment.

Key Facts about Particle Contaminations:

  • Up to 80% of lubrication-related machinery failures are caused by hard particles in oil.
  • Particles enter the system through seals, breathers, oil additions and changes, and wear.
  • Particles cause increased maintenance and downtime through abrasion, fatigue and eroding components.
  • The patch test is a time-proven, cost-effective and simple way to quickly identify abnormal contamination and wear.
  • The patch test can also help identify the primary types and sources of the particulate contaminants.

The Hydraulic Particles Test kit contains a heavy-duty 10ml syringe, check valve and weighted pick-up tube, filter holder and wrenches, tweezers, 8.0 micron filter patches – pack of 100, illuminated magnifier 30x and an instruction manual.


Features, Advantages & Benefits:

The User Manual for this kit includes information on:

  • Sampling methods
  • Diluting Samples
  • Using Filter Patches
  • Interpreting Results
  • Typical Fluid Cleanliness Requirements for various hydraulic system components and more



  • Field testing of lubricants


Specifications & Qualifications:
Interpreting Results:

The vast majority of test filter patches will be clean with very little contamination present. If metallic particles are present, use a small a magnet to determine if they are ferrous in nature. If these particles were generated internally, component wear is generally indicated.

Larger particles indicate that the filters are not working or may be inadequately sized for the system. Any visual level of dirt is unsatisfactory.

A dark filter generally indicates degradation of oil that has been in service too long or exposed to temperatures above its performance capability.

If the patch is clean, the oil is satisfactory for continued service. A patch that shows a lot of dirt, metallic particles and oil degradation materials indicates that the system oil and filters should be changed.

A high level of contamination indicates that the system should be drained and flushed. If the test sample indicates borderline conditions, use of a portable filter unit and re-testing in a month or other appropriate interval is recommended.

Note: Photos on this page do not accurately depict the color and detail of the photos in the User Manual.


















CONSUMABLES for this kit:

      Millipore Filter Pads DS-02A

TOOLS and SUPPLIES for this kit:

      Syringe Assembly DS-03

      Check Valve with Tubing and Weight

      Millipore Filter Pad Holder and Wrench Set

      Magnifier DS-K1-30X


The information contained herein is subject to change without notification. Typical properties may vary slightly.


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