Page 38 - WHITE BOOK

Research
Ref No FRX 090905 January 19th, 2006 Page Number 4
Property
BoilingPoint
Water Content
pH Neutrality Test
Corrosion Inhibitor Additives by Elemental Analysis(P, K, Na)
Colorimetric Corrosion Inhibitor Test, Scales 0- 100 (Strip Dip by Phoenix Systems)
DOT 3Limits
Dry 205°C (401°F) Wet 140°C (284°F)
7–11.5
50% of new fluid basel i ne
DOT 4Limits
Dry 230°C (446°F) Wet 155°C (311°F)
3% max.
3% max.
7–11.5
50% of new fluid B asel i ne
75 max
75 max
Patch Test for Sludge Content
(Radial Planer Chromatographic Analysis by FluidRx)
Particle Count
Visible darkening of center of substrate or donut shaped particlefield
ISO 21/18/16 max
Visibledarkeningof center of substrate or donut shaped particlefield
ISO 21/18/16 max
Sol i ds
0.10%
0.10%
Power SteeringFluids(P/SF)
There was little available information on power steering fluids in comparison to brake fluids. No studies were found relating to the condition of used power steering fluids over time.
Interval-based Recommendations:
Common intervals ranged between 30,000 and 60,000 miles.
Condition-based Recommendations:
There was no information found on condition-based limits on power steering fluids. However, in- service fluids should generally meet OEM performance specifications such as:
DaimlerChrysler MS5931
FordESW-M2C128-CandD GM 9985010
VolkswagenTL-VW-570-26 Navistar TMS6810
Power steering fluid is composed of mineral oil and additives and is similar to common hydraulic fluids. Some vehicles use A TF for their P/SF. A key measure of P/SF degradation is a loss of the antioxidant additive. When the antioxidant additive is depleted, the oil is susceptible to oxidation. The oxidation of the base oil increases viscosity, acid and deposits. The limits below are based in part on condemning limits of mineral-based hydraulic fluid and recommended particle count limits (both hard contaminants such as dirt as well as soft contaminants like sludge) for P/SF in the
l ab o r at o r y .
The comments and recommendations rendered are for general advisory purposes only and intended for the sole use of Fluid Rx. Distribution of copyright protected items is limited. These services are offered by Noria without warranty or liability as to accuracy or completeness of this information.
Noria Corporation 1328 E. 43rd Court Tulsa, OK 74105 918-749-1400