New Technology Was Necessary!
Strip Dip Tutorial
Brake Fluid Testing and Flushing
Contents:
- Strip Dip™
-
What Factors Affect Brake Fluid Condition
- What
Happens To Brake Fluid Over Time
-
What Causes
Depletion of Corrosion Inhibitors
-
What Happens When Corrosion inhibitors in Brake Fluid are Significantly
Depleted?
- Vehicle
Manufacturer's Position on Flushing Brake Fluid
- ASE and Brake
Fluid Flushing
-
US Department of Transportation Position
- The
California Bureau of Automotive Repair (BAR)
- Motorist
Assurance Program (MAP)
- What do the MAP Guidelines
Mean?
- What does
the Brake Industry Say about Strip Dip?
- TEST Don't Guess
Strip Dip™
- Is NOT a moisture test
- Measures metal oxidation catalysts
- Measures dissolved metal contamination that is a known precursor to
active corrosion
- Measure corrosion accelerators
- Repeatable test
- Shows the virtual age of brake fluid
- Test results last over 30 days
- Easy to read results
TOP

What Factors Affect Brake Fluid Condition?
- The age of brake fluid
- Level of corrosion inhibitors
- Amount of moisture
- Thermal oxidation
- Level of metal oxidation catalysts
- Environment and type of driving
Note: If the corrosion inhibitors are in good
condition, even high amounts of moisture (5%) will not cause corrosion.
Most people believe that it is moisture that causes the corrosion. It is
the lack of corrosion inhibitors that allow corrosion in the system. A
very small amount (1%) of moisture can increase corrosion when the
inhibitor package has been depleted.
TOP

What Happens To Brake Fluid Over Time ?
- Corrosion inhibitors in brake fluid are depleted
- Boiling point of brake fluid is reduced
- Thermal stability is decreased.
TOP
What Causes
Depletion of Corrosion Inhibitors?
- Time- Studies show that by 36 months some brake fluids have lost 91%
of their corrosion inhibitors.
- Increased thermal cycles
- Thermal oxidation
- Volatilization (vaporization)
- Type of driving and environment
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What Happens When Corrosion inhibitors in Brake Fluid are Significantly
Depleted?
- Integrity of hydraulic system is compromised and exposed to possible
corrosion
- Rapid increase of particulate contamination in brake fluid
- Metal oxidation catalysts increase that impair the oxidation
properties of the brake fluid
- Particulate contamination can cause damage to seals
- Particulate contamination has also proven to cause ABS valves not to
seal properly
Note 1: This is very important-Corrosion
inhibitors are designed to treat and protect the surfaces they are in
contact with. So, as corrosion inhibitors are depleted the surfaces may
still have some protection. There is a significant problem when a new
hydraulic part is installed, a caliper for example. The other hydraulic
parts have some protection from their exposure to the corrosion inhibitors
in brake fluid, but the new caliper is unprotected. Since the corrosion
inhibitors are now depleted the new part has no corrosion protection and
can corrode very quickly. A thorough brake system flush is recommended to
protect the new parts.
Note 2: Corrosion in the brake system has
been seen in vehicles after several years of operation where the brake
fluid passed the J1703 standard. Some feel that J1703 cannot predict the
affects of the long-term durability of the corrosion inhibitors in brake
fluid.
TOP

Vehicle
Manufacturer's Position on Flushing Brake Fluid
- 65-70% of World's vehicle manufacturers recommend brake fluid
flushing, 12-24 months
- GM, Ford and Chrysler have no recommended service interval
- GM, Ford and Chrysler do not oppose brake fluid flush performed by a
competent technician that can follow procedure
- GM recommends flushing the brake fluid if the system is
contaminated. They also added that they will not define "contamination".
Note: The title on Strip Dip™ tube states " Visual
Test for Brake Fluid Contamination"
TOP

ASE and
Brake Fluid Flushing
Advertising Supplement taken from USA Today April 17,2002
Protect Your Auto Investment....... Probably the most ignored fluid in your car, and the most important, is
brake fluid. Sludge will build up over a period of time and may block the
valves inside the anti-lock brake (ABS) units and result in costly repairs
or replacement. IN addition, this sludge may cause the calipers and wheel
cylinders to leak, also resulting in repairs or replacement. SO the best
thing you can do is to have the brake fluid flushed and refilled
periodically, although the manufacturer recommendations vary as to how
often.
TOP

US Department of Transportation Position
DOT Report Participants
- U.S. Department of Transportation (DOT)
- National Highway Traffic Safety Administration (NHTSA)
- Office of Defects Investigation (ODI)
- George Person, Safety Defects Engineer (202)-366-5210
Testing Performed By:
- National Institute for Science and Technology (NIST)-formerly the
National Bureau of Standards)
- Ohio State University
Information taken from the Technical Information Services Library
Note: The NIST study
shows that internal corrosion does take place in the brake system
over time. A prudent recommended practice to combat this situation would
be to periodically exchange the brake fluid by completely bleeding the
brake system and replacing the old fluid with fresh fluid that meets
current OE (Original Equipment) specifications."
TOP

The
California Bureau of Automotive Repair (BAR)
The BAR's concern is what is in the best interest of the
vehicle owner.
They don't have a problem with suggesting a brake fluid flush, but do
have a problem if the flush is not performed or performed improperly.
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Motorist
Assurance Program (MAP)
IMPORTANT CHANGE to brake Uniform Inspection Guidelines (UIG) re: Brake
Fluid:
The 1996 version of the MAP UIG's stated: " It is suggested that the
[brake] system should be flushed and refilled with brake fluid when
performing hydraulic brake service". IMPORTANT NOTE: This statement WAS
DELETED in the 1999 UIG's and remained deleted in the 2000 and 2002 UIG's
Brake System versions. Therefore please be advised that MAP no longer
suggests a flush and refill while performing routine brake service.
NEW 2002 UIG's
Reasons to suggest brake fluid flush:
- Beyond service interval
- Brake fluid type incorrect
- Contaminated
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What do the MAP
Guidelines Mean?
Reasons to Suggest a Brake Fluid Flush
- Beyond service interval- This does not apply to GM, Ford and
Chrysler since they have no service interval
- Brake fluid is incorrect- i.e. you cannot use DOT 5 silicone brake
fluid in most brake systems.
- Contaminated.
Note: The title on Strip Dip™
tube states " Visual Test for Brake Fluid Contamination"
TOP

What
does the Brake Industry Say about Strip Dip?
Dave Abbot, Wagner Brakes:
"Pleased with the lab tests. Shelf life is three
years and humidity won't contaminate the strips".
Wally Marciniac, Raybestos:
"It measures particulates of contamination vs.
moisture. It is a better factor of worn brake fluid than measuring the
boiling point, which determines possible braking failure, not breakdown of
system parts. Lab test prove the validity of the test strips".
TOP

TEST Don't Guess
- Gives the customer confidence
- Wise preventive maintenance
- Increase brake fluid flush sales
- Use Strip Dip™ on every inspection
- Get Strip Dip™ into the tech's hands
- Attach Strip Dip™ to repair order
TOP
The Best Way To Determine Brake Fluid
Contamination is with STRIP DIP™ using FASCAR™ technology.
Don't we need to worry about water in brake fluid?
Prior to the development of FASCAR
technology, brake fluid testing was based on measuring the moisture content that had
accumulated in the fluid. This was done in a variety of ways: 1. Direct boiling
point analysis (DBPA), 2. Conductivity meters, 3. Moisture indicating color
strips and then finally 4. Optical refractometer meters.
We even offered our own tester which used
DBPA and that's when we learned first hand the limitations of the moisture measurement
technology. In actuality, moisture level in the brake fluid only offers a limited
physical picture of the fluid's overall condition, it's life expectancy. Another
limitation is they only work on DOT 3 and DOT 4 brake fluid. The new FASCAR
technology is not a moisture or PH test, although brake fluid with a high FASCAR
rating often has a lowered boiling point because of captured moisture.
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