ISO INTERNATIONAL STANDARD 4927 Second edition 2005-06-15 RoadvehiclesElastomericbootsfor cylinders for drum type hydraulic brake wheel cylinders using a non-petroleum base hydraulic brake fluid (Service temperature 120 °C max.) Vehiculesroutiers- Capuchonsencaoutchoucpourcylindresderoue pourfreinshydrauliquesatambourutilisantunliquidedefreinabase nonpetroliere (temperature maximale d'utilisation 120C) Reference number ISO 4927:2005(E) @ISO 2005 out license from IHS Not for Resale ISO4927:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Case postale 56·CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland Copyigh Intematilnal organizationfor Standardzation @ ISO 2005 -All rights reserved itted without license from IHS Not for Resale ISO4927:2005(E) Foreword IsO (the International Organization for Standardization)is a worldwide federation of national standards bodies (iSO member bodies). The work of preparing International Standards is normally carried out through ISO non-governmental, in liaison with IsO, also take part in the work. Iso collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 4927 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 2, Braking systems andequipment. This second edition cancels and replaces the first edition (isO 4927:1978), which has been technically revised. ii Not for Resale Noreproductionornetworking permited without icense from IHS Not for Resale INTERNATIONAL STANDARD ISO4927:2005(E) Road vehicles Elastomeric boots for cylinders for drum type hydraulic brake wheel cylinders using a non-petroleum base hydraulic brake fluid (Service temperature 120 °C max.) 1 Scope This International Standard specifies performance tests for moulded rubber boots used at end closures on drum type wheel brake cylinders. These boots prevent the entrance of dirt and moisture which could cause corrosion and otherwise impair wheel brake operation. This International Standard is applicable to boots of both plain and reinforcement insert types, for fitting in wheel cylinders using a fluid in accordance with IsO 4925. It does not include requirements relating to chemical composition, tensile strength or elongation at brake of the rubber compound. It does not cover the strength of adhesion of rubber to the reinforcement in the insert type. The rubber material used in these boots shall be suitable for operation in a temperature range of - 4o C to + 120 °C. 2 Normati