ISO INTERNATIONAL STANDARD 4409 Third edition 2019-07 Hydraulic fluid power Positive displacement pumps, motors and integral transmissions - Methods of testing and presenting basic steady state performance Transmissions hydrauliques Pompes, moteurs et variateurs volumétriques- - Méthodes d'essai et de présentation des donnees de base du fonctionnement en regime permanent Reference number IS0 4409:2019(E) @ IS0 2019 IS0 4409:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland i @ IS0 2019 - All rights reserved