7633 (ISO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAA OPTAHW3ALMA HO CTAHAAPTW3AUMW+ORGANISATION INTERNATIONALE DE NORMALISATION Road vehicles - Elastomeric boots for drum type hydraulic brake wheel cylinders using a petroleum base hydraulic brake fluid (service temperature 120 oC max.) Vehicules routiers - Capuchons en caoutchouc pour cylindres de roue de freins hydrauliques a tambour utilisant un liquide de frein a base pétroliere (temperature maximale d'utilisation 120 oc) First edition - 1985-08-15 UDC 629.113-592.2 : 678.06 Ref. No. ISO 7633-1985 (E) 7633-1985 ( Descriptors : road vehicles, braking systems, hydraulic brakes, drum brakes, hydraulic cylinders, rubber products, tests, performance tests, marking. CopyrightIntenational Organizationfor Standardization Price based on 4 pages Not for Re Foreword national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7633 was prepared by Technical Committee ISO/TC 22, Road vehicles. @ International Organization for Standardization, 1985 . Printed in Switzerland ed without license from IHS Not for Resale ISO 7633-1985 (E) INTERNATIONAL STANDARD Road vehicles - Elastomeric boots for drum type hydraulic brake wheel cylinders using a petroleum base hydraulic brake fluid (service temperature 120 oC max.) Scope 4 General requirements 1 This International Standard specifies performance tests fo 4.1 Workmanship and finish moulded rubber boots used as end closures on drum type wheel brake cylinders used with a petroleum base hydraulic The moulded boots shall be free from blisters, pin-holes, brake fluid; these boots prevent the entrance of dirt and cracks, embedded foreign material, or other physical defects, moisture which could cause corrosion and otherwise impair brake operation. 4.2 Marking 2 Field of application 4.2.1 Each boot shall bear a green-coloured mark specifying that it refers to a category of boots for use with a petroleum This International Standard applies to boots of both plain and base brake fluid. reinforcement insert types, for fitting in wheel cylinders using a petroleum base hydraulic brake fluid in accordance with ISO 7309. It does not include requirements relating to chemical 4.2.2 The green identification mark can be ink or tinted composition, tensile strength or elongation at break of the rub- elastomer. ber compound; it does not cover the strength of the adhesion of rubber to the.reinforcement in the insert type. 4.2.3 The place and type of green mark shall be the subject of an agreement between buyer and seller. The rubber material used in these boots is ctassified as suitable for operation in a temperature range of -- 40 to + 120 °C. 4.2.4 The green mark shall entail neither extra thickness nor alteration of material characteristics; it shall remain during all handling, before bringing the boot into use. 3 References 4.2.5 The identification mark of the manufacturer and other ISO 48, Vulcanized rubbers --- Determination of hardness (Hardness between 30 and 85 IRHD). details as specified on the drawing shall be moulded into each boot where design permits. Each boot in conformity with this International Standard may also have the following mark : IsO 188, Rubber, vulcanized -- Accelerated ageing or heat- "ISO 7633". resistance tests. Is0 1431/1, Vulcanized rubber -- Resistance to ozone cracking 4.3 Packaging -Part 1: Static strain test