ISO INTERNATIONAL 8720 STANDARD First edition 1991-07-15 Passenger cars - Specifications for mechanical jacks Voitures particulieres - Speécifications des crics mecaniques Reference number ISO 8720 : 1991 (E) IHS Not for Resale ISO8720:1991(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 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and 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. Draft International Standards adopted by the technical committees are circulated to approval by at least 75 % of the member bodies casting a vote. International Standard ISO 8720 was prepared by Technical Committee ISO/TC 22, Roadvehicles,Sub-CommitteeSC14,Exteriorfittings. @ISO 1991 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 : Switzerland Printed in Switzerland ii .... Copyright international Organization for Standardization without license from IHS Not for Resale ISO 8720 : 1991 (E) INTERNATIONAL STANDARD Passenger cars -- Specifications for mechanical jacks Scope Operational requirements This International Standard specifies requirements to ensure Dimensions 5.1 the safety in use of original equipment mechanical jacks sup- plied with passenger cars (as defined in IS0 3833), in changing To establish the dimensional suitability of the jack for use on wheels and putting on chains. the vehicle with which it is supplied, the following requirements shall be met. 2 Normative references With the vehicle at the maximum manufacturer's total mass The following standards contain provisions which, through [ISO-M07 (see ISO 1176)], it shall be immobilized in accord- ance with the manufacturer's instructions, and standing on a reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated level concrete surface or equivalent; it shall then be possible to locate the jack correctly at each jacking point with a flat tyre to were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged give the least favourable conditions, and to lift the vehicle off to investigate the possibility of applying the most recent editions the ground to give sufficient clearance between the ground and of the standards indicated below. Members of IEC and ISO main- tain registers of currently valid International Standards. vehicle manufacturer. The spare wheel tyre shall be inflated to the maximum specified pressure. Iso 1176 : 1990, Road vehicles - Masses - Vocabulary and codes. 5.2 Operational effort ISo 3833 : 1977, Road vehicles - Types -- Terms and defi- It shall be possible to perform the jacking operations described nitions. in 5.1 by applying a force that shall not exceed the following values: 3 General requirements 360 N for jacks operated by up and down lever action; 120 N for all other types of jack operation. 3.1 Written instructions for the safe use of the jack shall be provided in the vehicle manufacturer's instruction manual. 5.3 ' Accidental operation The jack shall fit the jacking points specified by the 3.2 At any point over its full travel while raising or lowering the vehicle manufacturer and shall be capable of being operated vehicle, the jack mechanism shall not operate independently wit