ISO INTERNATIONAL STANDARD 789-7 First edition 1991-11-15 Agriculturaltractors-Testprocedures Part 7: Axlepowerdetermination Tracteursagricoles-Methodesd'essai Partie7:Determinationde lapuissanceauxrouesmotrices IoJuII LIDNANT HUUEsst by UNo Referencenumber ISO789-7:1991(E) ISO789-7:1991(E) Foreword IsO(the International Organization for Standardization)is a worldwide federationofnational standardsbodies (ISOmemberbodies).Thework ofpreparing InternationalStandards isnormallycarriedoutthroughisO technical committees.Each member body interested in a subject for whichatechnical committee has been establishedhas the rightto be represented on that committee.International organizations,govern- mental and non-governmental,inliaisonwithiso,alsotakepart inthe work.Iso collaborates closelywith theInternational Electrotechnical Commission(IEC)onall matters ofelectrotechnical standardization. Draft International Standards adopted by the technical commitlees are circulated to the member bodies for voting.Publication as an Inter- nationalStandardrequiresapprovalbyatleast75%ofthemember bodies casting a vote. InternationalStandardso789-7waspreparedbyTechnicalCommittee ISO/Tc23,Tractorsandmachineryforagricultureandforestry.Sub- CommitteeSC2,Commontests. Iso789 consists of the following parts,underthe general titleAgricul- turaltractors-Testprocedures: 1A1 1AA Part1:Powertestsforpowertake-off Part 2:Rear three-point linkage lifting capacity 101 Part3:Turningandclearancediameters - - Part4:Measurementofexhaustsmoke ZUI/ (UUCullelt Cur Part5:PartialpowerPTO-Non-mechanicallytransmittedpower - -Part6:Centreofgravity - Part7:Axlepowerdetermination inn Part8:Engineaircleaner - on I 1in Part9: Powertestsfordrawbar LIDNANT Part10: Measurement ofhydraulicpower- Tractorlimplement interface OSI 1991 permission in writing from the publisher. International Organization for Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland i ISO 789-7:1991(E) ---Part11:Steeringcapability-Wheeledtractors Annex Aforms an integral part of this part of iso 789.Annexes B, C, D andEareforinformationonly. nA1lId IAlIM nAA1IpIPn6 1nI1 innnnl an AACAIN kn ili