2057 (ISO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAR OPTAHW3AMR O CTAHAAPTW3AWW ORGANISATION INTE RNATIONALE DE NORMALISATION Agricultural tractors - Remote control hydraulic cylinders for trailed implements Tracteurs agricoles - Verins de commande hydraulique des instruments trainés Second edition - 1981-11-15 UDC 631.372 : 621.226 Ref. No. 1SO 2057-1981 (E) ISO 2057-1981 (E) Descriptors : agricultural machinery, tractors, central equipment, hydraulic cylinders, specifications, dimensions. Price based on 5 pages Copyright International Organization for Standardization permitted without license from IHS Not for Resale Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISo member bodies). The work of developing Inter- national Standards is carried out through iso technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmenta! and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 2057 was drawn up by Technical Committee ISO/TC 23, Agricultural tractors and machinery, and circulated to the member bodies in September 1973. Australia Portugal Germany, F.R. Austria Hungary Romania Belgium India South Africa, Rep. of Bulgaria Iran Spain Ireland Sweden Canada Chile Italy Switzerland Denmark Japan Thailand Egypt, Arab Rep. of Netherlands Turkey United Kingdom Finland New Zealand France Poland USA No member body expressed disapproval of the document. This second edition cancels and replaces the first edition (i.e. ISo 2057-1975). It differs from the latter only by the deletion of the values in inches and some editorial changes. @ Internationaf Organization for Standardization, 1981 Printed in Switzerland Not for Resale itted without license from IHS ISO 2057-1981 (E) INTERNATIONAL STANDARD Agricultural tractors - Remote control hydraulic cylinders for trailed implements 3 Definitions Scope and field of application This International Standard gives the specifications and dimen 3.1 moving end : The yoke of the piston rod. sions for the assembly and clearances common to hydraulically operated cylinders and to trailing-type farm implements. 3.2 anchor end : The closed end of the cylinder. The specifications given permit 3.3 attaching pins : Removable pins in the yokes for the interchangeability of hydraulic operation between attaching the cylinder to the implement. tractors equipped with a cylinder and trailing-type im- plements designed for this purpose, the tractor possessing enough power at its draw-bar to operate the implement; Classification and rating 4 the transference of the hydraulic cylinder from one im Minimum thrust capacity (extending stroke of the moving end) plement to another. shall be based on the calculated piston area and on a pressure of 80 % of the relief valve setting. This International Standard applies to three categories of agricultural tractors, as follows : Implements requiring a cylinder thrust of more than 80 kN shall be provided with 400 mm stroke cylinders. Category Maximum power at the draw-bar Table 1 - General characteristics 1 Up to 35 kW 23 30 to 75 kW Over 70 kW Minimum Spherical Length thrust per radius to of stroke kilowatt at front Category the draw-bar attaching pin* 2 References mm N mm 200 + 5 924 1 500 Iso 500, Agricultural tractors - Power take-off and draw-bar - 1 Specification. 200 + 5 924 2 100 2 ISo 730/1, Agricultural wheeled tractors Three-point 0 + 002 924 2 500 linkage -- Part 1 : Categories 1, 2 and 3. 3 400 + 924 2 500 Iso 789/1, Agricultural tractors -- Test procedure - Part 1 : Power tests. See figu