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Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor Hennepin Technical College 1

Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 1: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Hydraulic Fluid

Contamination and Assessment

Presented by: Ernie Parker

Fluid Power Engineering Technology Instructor

Hennepin Technical College

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Page 2: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Heat problems are generally a design problem.

Assembly could be improper hose installation.

Contamination is everyone’s concern.

About 95% of all hydraulic problems

are cause by heat, assembly, and

contamination.

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Page 3: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

You are a Fluid Power Machine

• Pump – Heart

• Arteries – Pressure Lines

• Veins – Return Lines

• Kidneys – Filter

• Kidney Loop – Off-line Filtration

• Muscles – Cylinders & Flow Controls

• Brain – PLC (Programmable Logic Controller)

• Our Sensors (Sight, Smell, Touch, & Hearing, - Instrumentation

• Nervous System – Servos & Proportional Control Systems

• Lungs – Pneumatic System

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Page 4: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

How careful do you want a

hospital and doctor to be when

working on you?

• That is how you should treat a hydraulic system, with the same cleanliness as human surgery.

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Page 5: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Sizes of Particles in Micro-meters

• Grain of Table Salt 100

• Human Hair 70

• Lower Limit of Visibility 40

• White Blood Cells 25

• Red Blood Cells 8

• Average Bacteria 2

• 100 mesh screen = 149

• 325 mesh screen = 44

• 1 micro-meter = .000039 in or 39/1,000,000 of an inch

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Page 6: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

1. New Oil

2. From manufacturing and handling of

components during shipping and fabrication

3. Ingressed contamination

4. Wearing of components

Sources of Contamination

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Page 7: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Particles found in new fluids range from

rust, dirt, sand, & water from either

condensation or leakage into a container

from sitting in the elements.

Examples of Water

Take a five gallon pail that has been empty

and screw the cover back on and leave it

outside in the rain. After a couple of good

rains, you may have ¼” of water in the

bottom of the pail and yet the cap was

screw on tightly.

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Page 8: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

When stored properly, one can still find various

particles.

New oil has a rating of approximately 33 micron

or 17/16/14 on the ISO 4406 chart from a

reputable supplier.

The Hydraulic Specialist study guide suggests

that new oil is in the range of 20/18/14. That

means there are between 81 and 160 particles

14 micron in size per ml.

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Page 9: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 10: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 11: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 12: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

• Components ports not plugged

• Components stored in bad environment

• Pumps/motors prefilled with dirty or unfiltered oil

• Use of floor dry or similar oil absorbents in shop areas

• Dirty hands, shop rags & lint used during assembly

• Dirty work benches

• Dirty oil in test bench use to performance check components

• Welding and fabrication contaminate

• Broken tools during manufacturing

• Fittings laying around and not cleaned

• Dirty hoses from assembly that were not cleaned and capped

• Assembly in a fabrication environment

• Dirty manufacturing procedures

• Dirty cutting fluid

• Improper flushing techniques

• Is a high enough velocity used to create flow turbulence when flushing parts?

• Dirty ports plugs

• Shop rags used to plug ports

• Not cleaning around ports before removing plugs for assembly

• Reservoirs not clean properly before assembly

• Filters on the shelve but not in sealed container

Where does manufacturing

contamination come from?

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Page 13: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Contamination Types and Sources

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Page 14: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Contamination Types and Sources

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Page 15: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 16: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 17: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Contamination Types and Sources

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Page 18: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Contamination Types and Sources

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Page 19: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Contamination Types and Sources

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Page 20: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 21: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 22: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Contamination Basics

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Page 23: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Ingressed Contamination

• Reservoir vent port

• Access covers not sealed

• Components ports left open

• Cylinder wiper seals damage by outside sources such as rust or nicks in rods

• Cavitation

• Wear of components cause by dirty oil or too low of viscosity of oil

• Wrong or poor additives

• Too course of filtration 23

Page 24: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Wearing of Components

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Page 25: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 26: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 27: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 28: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Examples of Wear on Components

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Page 29: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 30: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 31: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 32: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 33: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

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Page 34: Hydraulic Fluid Contamination and Assessment€¦ · Hydraulic Fluid Contamination and Assessment Presented by: Ernie Parker Fluid Power Engineering Technology Instructor . Hennepin

Thanks to our industry partners for their contribution with this presentation:

Eaton/Vickers Corporation & Parker Hannifin Corporation

Please continue your education by checking out the following:

The Systemic Approach to Contamination Control By Vickers

The Handbook of Hydraulic Filtration By Parker

Special Thanks

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