BS ISO BRITISH STANDARD 4930:2006 Road vehicles Elastomeric seals for hydraulic disc brake cylinders using a non-petroleum base hydraulic brake fluid (Service temperature 150 °C max.) ICS 43.040.40; 83.140.50 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BS ISO 4930:2006 National foreword This British Standard reproduces verbatimISO 4930:2006 and implements it as theUK national standard. The UK participation in its preparation was entrusted to Technical Committee PRI/69, Components and fluids for vehicle braking systems, which has the responsibility to: aid enquirersto understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can beobtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled "International Standards Correspondence Index", or by using the“Search" facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not ofitself confer immunity fromlegal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. This British Standard was Amendmentsissuedsincepublication published under the authority of the Standards Policy and Date Amd. No. Comments Strategy Committee on 31 July 2006 BSI 2006 ISBN0580487067 BS ISO 4930:2006 ISO INTERNATIONAL STANDARD 4930 Second edition 2006-07-15 RoadvehiclesElastomericsealsfor hydraulic disc brake cylinders using a non-petroleum base hydraulic brake fluid (Service temperature 150 °C max.) Vehicules routiersJointsen caoutchoucpour cylindres de freins hydrauliques a disqueutilisant un liquide de frein a base non petroliere (Temperaturemaximaled'utilisation150°C) Reference number ISO 4930:2006(E) ISO ii BSISO4930:2006 Contents Page Foreword iv 1 Scope. 2 Normativereferences. 3 Product requirements... Brake test fluid... 4 5 Apparatus... 2 5.1 Apparatusfortestof resistancetofluidat elevatedtemperature,physical stabilityand precipitation characteristics............ 2 5.2 Apparatus for high-temperature stroking test (see Figure 1). 2 5.3 Apparatus for low-temperature leakage test (see Figure 2)... 6 Test requirements. 3 7 Preparationoftestspecimens 4 8 Resistancetofluid atelevatedtemperature 4 8.1 Test specimens... 8.2 Test procedure. 5 9 Resistancetofluid at elevatedtemperature-Precipitation characteristics. 5 9.1 Test specimens.... 5 9.2 Test procedure. 5 10 Resistance to elevated temperature in dry air... 6 10.1 Test specimens... 6 10.2 Test procedure.... 11 Ambient-temperature strokingtest.. 6 11.1 Test specimens..... 6 11.2 Test procedure.. 12 High-temperature stroking test. 12.1 Test specimens.... 12.2 Test procedure... 13 Low-temperature leakage test.. 13.1 Test specimens .... 8 13.2 Test procedure.. 13.3 Bent test procedure... 14 Cycling humidity storage corrosion test. 14.1 Test specimens.... 14.2 Test procedure... 9 ili BSIS04930:2006 Foreword ISsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Di