ISO INTERNATIONAL STANDARD 20474-7 Second edition 2017-07 Earth-moving machinery Safety - Part 7: Requirements for scrapers Engins de terrassement- Sécurité- Partie 7: Exigences applicables aux décapeuses Reference number ISO 20474-7:2017(E) International Organization for Standardization @ IS0 2017 ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS underI IS020474-7:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017,Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41227490947 [email protected] www.iso.org ensee-ZHEJIANG INST.OF STANDARDIzARoISQa7 - All rights reserved Not for Resale, 2017/9/11 05:43:00 etworking permitted without license from IHS IS0 20474-7:2017(E) Contents Page Foreword ..iv Introduction. 1 Scope.. 2 Normative references 3 Terms and definitions 4 Safety requirements and protective measures .2 4.1 General .2 4.2 Operator's seat 4.3 Retarder. 2 4.4 Articulated frame lock .2 4.5 Towing device 2 4.6 Noise. .2 4.6.1 Sound power level .2 4.6.2 Emission sound pressure level at operator's station .2 4.7 Access to engine compartment 3 5 Information for use 3 Annex A (informative) Illustrations. ..4 Bibliography .6 iii see=ZHEJIANG INST OF STANDARDIZATION C15956617 vided by IHS under lic d without license from IHS Not for Resale, 2017/9/11 05:43:00