BS ISO 4925:2005
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Road vehicles. Specification of non-petroleum-base brake fluids for hydraulic systems
Hardcopy , PDF
24-07-2020
English
15-03-2005
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Foreword
Introduction
1 Scope
2 Normative references
3 Materials
4 Specifications
5 Test methods
5.1 Viscosity
5.1.1 General
5.1.2 Repeatability (single analyst)
5.1.3 Reproducibility (multi-laboratory)
5.2 Equilibrium reflux boiling point (ERBP)
5.2.1 General
5.2.2 Preparation of apparatus
5.2.3 Test procedure
5.2.4 Repeatability (single analyst)
5.2.5 Reproducibility (multi-laboratory)
5.2.6 Wet ERBP test
5.3 pH
5.4 Fluid stability
5.4.1 High-temperature stability
5.4.2 Chemical stability
5.5 Corrosion
5.5.1 Metal strip characteristics prior to testing
5.5.2 Preparation of joints
5.5.3 Test procedure
5.6 Fluidity and appearance at low temperatures
5.6.1 At -40 degrees C for 144 h
5.6.2 At -50 degrees C for 6 h
5.7 Water tolerance
5.7.1 At -40 degrees C for 22 h
5.7.2 At 60 degrees C for 22 h
5.8 Compatibility/miscibility with ISO 4926 fluid
5.8.1 At -40 degrees C for 22 h
5.8.2 At 60 degrees C for 22 h
5.9 Resistance to oxidation
5.10 Effect on rubber
5.10.1 General
5.10.2 Test procedures
5.10.3 Repeatability (single analyst)
5.10.4 Reproducibility (multi-laboratory)
Annex A (normative) ISO Styrene-butadiene rubber (SBR)
brake cups for testing brake fluid
Annex B (normative) Corrosion test strips
Annex C (normative) Corrosion strip assembly
Annex D (normative) Standard ethylene, propylene and diene
(EPDM) terpolymer rubber slabstock
Annex E (normative) Triethylene glycol monomethyl ether
(TEGME) brake fluid grade
Bibliography
Provides the specifications - requirements and test methods - for non-petroleum-base fluids used in road-vehicle hydraulic brake and clutch systems that are designed for use with with such fluids and equipped with seals, cups or double-lipped type gland seals made of styrene-butadiene rubber (SBR) and ethylene-propylene elastomer (EPDM).
| Committee |
AUE/15
|
| DevelopmentNote |
Supersedes BS AU174-2(1985) (03/2005)
|
| DocumentType |
Standard
|
| Pages |
34
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| ISO 4925:2005 | Identical |
| ISO 812:2017 | Rubber, vulcanized or thermoplastic — Determination of low-temperature brittleness |
| ASTM D 1613 : 2017 : REDLINE | Standard Test Method for Acidity in Volatile Solvents and Chemical Intermediates Used in Paint, Varnish, Lacquer, and Related Products |
| ISO 4926:2006 | Road vehicles Hydraulic braking systems Non-petroleum-base reference fluids |
| ASTM D 1120 : 2017 : REDLINE | Standard Test Method for Boiling Point of Engine Coolants |
| ASTM E 260 : 1996 | Standard Practice for Packed Column Gas Chromatography |
| ASTM D 3182 : 2016 : REDLINE | Standard Practice for Rubber—Materials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets |
| ASTM D 91 : 2002 : R2007 | Standard Test Method for Precipitation Number of Lubricating Oils |
| ASTM D 865 : 2011 | Standard Test Method for Rubber<char: emdash>Deterioration by Heating in Air (Test Tube Enclosure) |
| SAE J1703_201607 | Motor Vehicle Brake Fluid |
| ISO 37:2017 | Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties |
| ISO 48:2010 | Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) |
| ASTM D 746 : 2014 : REDLINE | Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact |
| ISO 1817:2015 | Rubber, vulcanized or thermoplastic Determination of the effect of liquids |
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