BS ISO 4926:2020 pdf free.Road vehicles一Hydraulic braking systems一 Non-petroleum-based reference fluid.
BS ISO 4926 This document specifies the composition and characteristics of a reference fluid used for the compatibility testing of hydraulic braking systems and components mounted on road vehicles. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 4925, Road vehicles一Specification of non-petroleum-base brake fluids for hydraulic systems ASTM D 1121, Standard Test Method for Reserve Alkalinity of Engine Coolants and Antirusts ASTM D 6304, Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils,and Additives by Coulometric Karl Fischer Titration 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses:ISO Online browsing platform: available at https://www.iso.org/obp 一IEC Electropedia: available at http://www.electropedia.org/4 ISO reference fluid for compatibility testing The composition of the reference fluid is specified in Table 1. The fluid shall comply with the specifications of ISO 4925.This document was prepared by Technical Committee ISO/TC 22 Road vehicles, Subcommittee SC 33 Vehicle dynamics and chassis components.This third edition cancels and replaces the second edition ISO 4926:2006， which has been technically revised. The main changes compared to the previous edition are as follows:  New chemical formulation of reference fluid 一to simplify the recipe in order to avoid blending mistakes and to meet the ISO 4925 requirements. Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/ members.html. BS ISO 4926 pdf downlaod.