ISO-5676-1983.pdf

International Standard 5676 lNTERNAT,DNAL DRGANlZATlDN FOR STANDARDIZATION*MEMYHAPOfiHAR DPrAHM3AUWR I-ID CTAHPTM3AL(WWORGANlSATlON INTERNATIONALE DE NORMALISATIDN Tractors and machinery for agriculture and forestry - Hydraulic coupling - Braking circuit Tracteurs et matkiels agricoles et forestiers - Coupleurs hydrauliques - Circuit de freinage First edition - 1963-06-01 iii UDC 629.1.013.5 : 631.3-59 Ref. No. IS0 5676-1963 (E) Descriptors : agricultural equipment, forest equipment, tractors, braking systems, hydraulic equipment, hydraulic couplings, dimensions, k interchangeability, tests, pressure tests. : - Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 20:14:48 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of developing International Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organizations, governmental 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 IS0 Council. International Standard IS0 6676 was developed by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, and was circulated to the member bodies in April 1982. It has been approved by the member bodies of the following countries : Australia Austria Belgium China Czechoslovakia Denmark Egypt, Arab Rep. Finland France of Germany, F. R. India Iran Italy Korea, Rep. of Mexico New Zealand Norway Portugal Romania South Africa, Rep. of Spain Sweden Switzerland Turkey United Kingdom USA The member bodies of the following countries expressed disapproval of the document on technical grounds : Canada USSR 0 International Organization for Standardization, 1999 0 Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 20:14:48 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 5676-1963 (E) Tractors and machinery for agriculture and forestry - Hydraulic coupling - Braking circuit 1 Scope 3 References This International Standard specifies the conditions for inter- changeability, and the operating characteristics and lays down the technical specifications for tests, for the hydraulic coup- lings on braking systems for towed agriculture and forestry machinery. IS0 2082, Metallic coatings - Electroplated coatings of cad- mium on iron or steel. IS0 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity and calculation of dynamic viscosity. 2 Field of application This International Standard applies solely to hydraulic brake couplings. The braking system is of a regulatable type, operated by an in- crease in pressure within a service pressure range of between 10 and 15 MPa 1100 and 150 bar). These devices are used to connect or disconnect the braking circuit each time trailed agricultural or forestry machinery is hitched or unhitched. 0,7 max. Optional groove Closed -/ Open 73d.l IS0 5575, Agricultural tractors and machinery - Hydraulic couplers for general use - Specifications. 4 Definitions See IS0 5575. 5 Dimensional characteristics The coupling shall conform with the figure. Dimensions in millimetres 6,2 max.-, , L9,3 min. T I- End face Rounded Closed Open Travel 6 min. Fixed part : Movable part : Male part fixed on the Female part fixed to the tractor trailed vehicle NOTE - The sole aim of the configuration of the coupling is to illustrate and give the reference dimensions. It is not intended to convey design requirements. Figure - Dimensions of the hydraulic coupler Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 20:14:48 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO6676-1963 (E) 6 Operating characteristics and technical specifications 6.1 Operating characteristics 6.1.1 Pressures 6.2.3 Testing of the male and female parts with hydraulic fluid The following tests shall be carried out using a hydraulic fluid of high fluidity with viscosity of - not less than 10 mm2/s (IO cSt1) at %I,4 OC, - not greater than 500 mm2/s (500 cSt) at -40 OC (see IS0 3104). The normal service pressure shall be 15 MPa (150 bar) max- imum. When the tractor is operated without a trailer, the unconnected male part shall be able to withstand the maximum permissible service pressure of 15 MPa (150 bar). 6.2.3.1 Hydraulic test pressure Apply a pressure of 22,5 MPa (225 bar) for 5 min : - to the male part, Connection and disconnection of the coupling device should normally only be carried out without pressure in the circuit. Under these conditions, the disconnecting force applied to the locking ring shall be less than 45 N. For connection, a force of less than 150 N shall be applied to the body of the female part. - to the female part alone, - to the connected male and female parts. No leakage, permanent distortion or disconnection shall be observed. 6.2.3.2 Loss of oil and intake of air on coupling 6.1.2 Temperature The operating temperatures shall be between -30 OC and 100 OC with possible peaks at 140 YZ and shall last not more than 1 h. Connect the male part and female part to the testing bench by flexible tubing and subject them to a pressure of 0,Ol MPa (0,l bar). After coupling and uncoupling 100 times in the horizontal posi- tion at a temperature of 20 + 5 OC, it shall be verified that : 6.2 Technical specifications - total oil loss has not exceeded 5 ml. 6.2.1 Seals 6.2.3.3 Loss of pressure The seals shall be compatible with the oils used in agriculture and under the operating conditions specified in 6.1. For an output of 20 Vmin under a pressure of 15 MPa (150 bar) at a temperature of 20 Z!I 5 OC, the loss of pressure shall not exceed 0,2 MPa (2 bar). 6.2.2 Protection 7 Fixing of the male half of the coupling The external parts shall be protected by cadmium coating 8 to The male part of the coupling shall be mounted on the tractor 12 pm thick or by any other material giving similar protection. facing backwards. 1) 1 cSt (centistokes) = 1 mm2/s 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 20:14:48 MDTNo reproduction or networking permitted without license from IHS -,-,-