ISO INTERNATIONAL STANDARD 789-8 First edition 1991-11-01 Agricultural tractors - Test procedures - Part 8: Engine air cieaner Tracteursagricoles-Methodesd'essal- Partie 8: Filtre a air du moteur Referencenumber ISO 789-8 1991(E) ISO 789-8:1991(E) Foreword Iso (the International Organization for Standardization)is a worldwide federation ofnational standards bodies (Iso memberbodies)Thework 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)onallmattersofelectrotechnicalstandardization. Draft International Standards adopted by thetechnical committees are circulated to the member bodies for voting Publication as an Inter- national Standard requires approval by at least 75%of the member bodies casting a vote. International StandardIso789-8waspreparedbyTechnical Committee Iso/T 23,Tractors and machinery for agriculture and forestry,Sub- CommitteeSc2,Commontests iso 789 consists ofthe following parts,under the general title Agricul- turaltractors--Testprocedures: Part1:Powertests forpowertake-off - Part 2:Rear three-point linkage lifting capacity 一 Part 3:Turningand clearance diameters Part4:Measurementof exhaust smoke Part5:PartialpowerPTO-Non-mechanicallytransmittedpower Part 6:Centre of gravity Part7:Axlepowerdetermination - Part 8:Engine air cleaner - Part9:Powertestsfordrawbar Part10:Measurement of hydraulicpower Tractor/implement - interface C ISO .1991 All rights reserved.No part of this publicationmaybe reproduced or utilized in anyform permission in writing from the publisher. International Organization for Standardization Case Postale 56.CH-1211Geneve20·Switzerland Printed in Switzerland ii ISO789-8:1991(E) Part11:Steeringcapability-Wheeledtractors AnnexAforms an integral part of thispart of iso789 ii