ISO 5675:2021
(Main)Agricultural tractors and machinery - General purpose quick-action hydraulic couplers
Agricultural tractors and machinery - General purpose quick-action hydraulic couplers
This document specifies the essential interface dimensions and the operating requirements for hydraulic couplers employed to transmit hydraulic power from agricultural tractors to agricultural machinery. It is applicable to couplers used in hydraulic lines other than those used for braking circuits. NOTE All hydraulic couplers are intended to be connected and disconnected frequently to allow the transfer of machinery from one tractor to another without the use of tools or special devices.
Tracteurs et matériels agricoles — Coupleurs hydrauliques à usage général
Le présent document spécifie les dimensions de raccordement principales, ainsi que les exigences de fonctionnement, pour les coupleurs hydrauliques utilisés pour transmettre la puissance hydraulique des tracteurs agricoles aux machines agricoles. Il s'applique aux coupleurs utilisés sur les canalisations hydrauliques, à l'exception des coupleurs utilisés dans les circuits de freinage. NOTE Tous les coupleurs hydrauliques sont conçus pour être connectés et déconnectés fréquemment pour permettre le transfert des machines d'un tracteur à un autre, sans utiliser aucun outil ou dispositif spécifique.
General Information
- Status
- Published
- Publication Date
- 24-Jun-2021
- Technical Committee
- ISO/TC 23/SC 4 - Tractors
- Drafting Committee
- ISO/TC 23/SC 4/WG 14 - Revision of ISO 17567
- Current Stage
- 6060 - International Standard published
- Start Date
- 25-Jun-2021
- Due Date
- 06-Feb-2022
- Completion Date
- 25-Jun-2021
Relations
- Effective Date
- 23-Apr-2020
Overview
ISO 5675:2021 specifies the essential interface dimensions and operating requirements for general purpose quick-action hydraulic couplers used in agricultural tractors and machinery. These hydraulic couplers are designed to safely and efficiently transmit hydraulic power from tractors to attached agricultural implements and machinery, excluding braking circuits. The standard emphasizes couplers that enable frequent connection and disconnection without tools or special devices, facilitating easy transfer of equipment between tractors.
Developed by ISO Technical Committee ISO/TC 23, this fourth edition updates previous versions by aligning coupler mounting zones with industry practices and expanding specifications for rear-mounted couplers. The standard is critical for manufacturers and users of agricultural hydraulic couplings, ensuring interoperability, safety, and performance across diverse tractor and machinery combinations.
Key Topics
- Interface Dimensions: Defines coupler male part dimensions according to ISO 7241:2014 Series A sizes (12.5 mm and 20 mm nominal). A specific 15° angle is required to maintain compatibility with dust protection devices.
- Operating Requirements:
- Couplers must meet pressure drop limits (max 0.35 MPa at specified flow rates).
- Fluid loss limits are set for disconnection under pressures of 0.1 MPa and 17.5 MPa.
- Force required to open valves in male couplers must not exceed defined thresholds (45 N for size 12.5 and 70 N for size 20).
- Couplers must not close valves prematurely at low flow rates, ensuring continuous oil flow during operation.
- Mounting Locations: Specifies precise locations for rear, front, and side couplers on tractors to standardize installation and ease of use. Female couplers are mandated for front and rear mounting; side couplers may use either female or male.
- Compatibility Assurance: Any male coupler conforming to the dimensional requirements will connect properly with any female coupler built to this standard, ensuring interchangeability.
Applications
ISO 5675:2021 is widely applicable in modern agricultural operations where quick and reliable hydraulic power transfer is essential, including:
- Attaching and detaching hydraulic implements such as plows, seeders, sprayers, and balers to tractors.
- Facilitating modular equipment management by allowing operators to switch machinery without specialized tools.
- Supporting tractor and machinery manufacturers in designing hydraulic systems with nationally and internationally recognized coupling specifications.
- Enhancing safety in hydraulic connections by minimizing fluid loss and controlling pressure drops during operation.
- Standardizing coupler interfaces to simplify inventory and maintenance of parts in agricultural supply chains.
This standard is vital for agricultural equipment manufacturers, tractor designers, farmers, and maintenance professionals seeking to improve efficiency, safety, and operational flexibility in hydraulic coupling systems.
Related Standards
- ISO 7241:2014 - Hydraulic fluid power - Dimensions and requirements of quick-action couplings, serves as a fundamental reference for coupling dimensions and performance.
- ISO 18869:2017 - Hydraulic fluid power - Test methods for couplings actuated with or without tools, provides testing protocols for pressure drop and fluid loss measurements.
- ISO 4397 - Fluid power connectors and associated components - Nominal hose sizes relevant to coupling dimensions.
- ISO 5676 - Hydraulic coupling for braking circuits in agricultural machinery, complementary to ISO 5675 for braking-specific hydraulic lines.
- ISO 6489-3 - Agricultural vehicles - Mechanical connections between towed and towing vehicles, informs tractor drawbar positioning for mounting couplers.
Compliance with ISO 5675 helps ensure harmonized design, manufacturing, and safety standards in agricultural hydraulic coupling systems, improving interoperability on a global scale.
By adhering to ISO 5675:2021, stakeholders in the agriculture machinery sector can optimize hydraulic power transmission through standardized, reliable, and easy-to-use quick-action couplers, driving operational efficiency and equipment versatility.
ISO 5675:2021 - Agricultural tractors and machinery — General purpose quick-action hydraulic couplers Released:6/25/2021
ISO 5675:2021 - Tracteurs et matériels agricoles — Coupleurs hydrauliques à usage général Released:6/25/2021
Frequently Asked Questions
ISO 5675:2021 is a standard published by the International Organization for Standardization (ISO). Its full title is "Agricultural tractors and machinery - General purpose quick-action hydraulic couplers". This standard covers: This document specifies the essential interface dimensions and the operating requirements for hydraulic couplers employed to transmit hydraulic power from agricultural tractors to agricultural machinery. It is applicable to couplers used in hydraulic lines other than those used for braking circuits. NOTE All hydraulic couplers are intended to be connected and disconnected frequently to allow the transfer of machinery from one tractor to another without the use of tools or special devices.
This document specifies the essential interface dimensions and the operating requirements for hydraulic couplers employed to transmit hydraulic power from agricultural tractors to agricultural machinery. It is applicable to couplers used in hydraulic lines other than those used for braking circuits. NOTE All hydraulic couplers are intended to be connected and disconnected frequently to allow the transfer of machinery from one tractor to another without the use of tools or special devices.
ISO 5675:2021 is classified under the following ICS (International Classification for Standards) categories: 65.060.10 - Agricultural tractors and trailed vehicles. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 5675:2021 has the following relationships with other standards: It is inter standard links to ISO 5675:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 5675:2021 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 5675
Fourth edition
2021-06
Agricultural tractors and
machinery — General purpose quick-
action hydraulic couplers
Tracteurs et matériels agricoles — Coupleurs hydrauliques à usage
général
Reference number
©
ISO 2021
© ISO 2021
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
4.1 General . 1
4.2 Dimensional requirements . 1
4.3 Operating requirements. 2
5 Location on tractor . 3
Bibliography . 5
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work 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, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
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expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture
and forestry, Subcommittee SC 4, Tractors.
This fourth edition cancels and replaces the third edition (ISO 5675:2008), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the normative references have been updated;
— the coupler mounting zone for side couplers has been increased to match industry practice;
— a zone for rear couplers has been added when more than three sets of couplers are used on the rear.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
INTERNATIONAL STANDARD ISO 5675:2021(E)
Agricultural tractors and machinery — General purpose
quick-action hydraulic couplers
1 Scope
This document specifies the essential interface dimensions and the operating requirements for
hydraul
...
NORME ISO
INTERNATIONALE 5675
Quatrième édition
2021-06
Tracteurs et matériels agricoles —
Coupleurs hydrauliques à usage
général
Agricultural tractors and machinery — General purpose quick-action
hydraulic couplers
Numéro de référence
©
ISO 2021
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2021
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii © ISO 2021 – Tous droits réservés
Sommaire Page
Avant-propos .iv
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Exigences . 1
4.1 Généralités . 1
4.2 Exigences dimensionnelles . 2
4.3 Exigences de fonctionnement . 2
5 Position sur le tracteur . 3
Bibliographie . 5
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www
.iso .org/ directives).
L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www .iso .org/ brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l'intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www .iso .org/ avant -propos.
Le présent document a été élaboré par le comité technique ISO/TC 23, Tracteurs et matériels agricoles et
forestiers, sous-comité SC 4, Tracteurs.
Cette quatrième édition annule et remplace la troisième édition (ISO 5675:2008), qui a fait l’objet d’une
révision technique.
Par rapport à l’édition précédente, les principales modifications sont les suivantes:
— les références normatives ont été mises à jour;
— la zone de montage des coupleurs pour les coupleurs montés latéralement a été augmentée afin de
correspondre aux pratiques de l’industrie;
— une zone a été ajoutée pour les coupleurs montés à l’arrière lorsque plus de trois ensembles de
coupleurs sont utilisés à l’arrière.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www .iso .org/ members .html.
iv © ISO 2021 – Tous droits réservés
NORME INTERNATIONALE ISO 5675:2021(F)
Tracteurs et matériels agricoles — Coupleurs hydrauliques
à usage général
1 Domaine d'application
Le présent document spécifie les dimensions de raccordement principales, ainsi que les exigences de
fonctionnement, pour les coupleurs hydrauliques utilisés pour transmettre la puissance hydraulique
des tracteurs agricoles aux machines agricoles. Il s'applique aux coupleurs utilisés sur les canalisations
hydrauliques, à l'exception des coupleurs utilisés dans les circuits de f
...














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