EN ISO 5674:2025

SLOVENSKI STANDARD
01-januar-2026
Nadomešča:
SIST EN ISO 5674:2009
Traktorji ter kmetijski in gozdarski stroji - Ščitniki za priključne gredi - Preskusi
trdnosti in obrabe ter merila sprejemljivosti (ISO 5674:2024)
Tractors and machinery for agriculture and forestry - Guards for power take-off (PTO)
drive-shafts - Strength and wear tests and acceptance criteria (ISO 5674:2024)
Traktoren und land- und forstwirtschaftliche Maschinen - Schutzeinrichtungen für
Gelenkwellen - Festigkeits- und Verschleißprüfungen und Annahmekriterien (ISO
5674:2024)
Tracteurs et matériels agricoles et forestiers - Protecteurs d'arbres de transmission à
cardans de prise de force (p.d.f) - Essais de résistance mécanique et d'usure et critères
d'acceptation (ISO 5674:2024)
Ta slovenski standard je istoveten z: EN ISO 5674:2025
ICS:
65.060.01 Kmetijski stroji in oprema na Agricultural machines and
splošno equipment in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5674
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2025
EUROPÄISCHE NORM
ICS 65.060.01 Supersedes EN ISO 5674:2009
English Version
Tractors and machinery for agriculture and forestry -
Guards for power take-off (PTO) drive-shafts - Strength
and wear tests and acceptance criteria (ISO 5674:2024)
Tracteurs et matériels agricoles et forestiers - Traktoren und land- und forstwirtschaftliche
Protecteurs d'arbres de transmission à cardans de Maschinen - Schutzeinrichtungen für Gelenkwellen -
prise de force (p.d.f) - Essais de résistance mécanique Festigkeits- und Verschleißprüfungen und
et d'usure et critères d'acceptation (ISO 5674:2024) Annahmekriterien (ISO 5674:2024)
This European Standard was approved by CEN on 20 December 2024.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5674:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 4
European foreword
This document (EN ISO 5674:2025) has been prepared by Technical Committee ISO/TC 23 "Tractors
and machinery for agriculture and forestry" in collaboration with Technical Committee CEN/TC 144
“Tractors and machinery for agriculture and forestry” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2026, and conflicting national standards shall be
withdrawn at the latest by May 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 5674:2009.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 5674:2024 has been approved by CEN as EN ISO 5674:2025 without any modification.

Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered
This European Standard has been prepared under a Commission’s standardization request “M/396
Mandate to CEN and CENELEC for Standardisation in the field of machinery" to provide one voluntary
means of conforming to essential requirements of Directive 2006/42/EC of the European Parliament
and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast).
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Annex I
of Directive 2006/42/EC
The relevant Essential
Clause(s)/sub-clause(s)
Requirements of Directive Remarks/Notes
of this EN
2006/42/EC
1.1.2.a) 4; 5; 6; 7; Annex A, Annex B
1.1.2.c) 4; 5; 6; 7; Annex A, Annex B
1.1.3 5.2.2; 5.2.3; 6.3; 6.5
1.3.2 4; 6; 7; 8; Annex A, Annex B
1.3.3 4; 6; 7; 8; Annex A, Annex B
1.3.6 5.1
1.3.7 4; 6
1.3.8.2 6
1.4.1 4; 5; 6; 7; Annex A, Annex B
1.5.11 4.1; 5.2.1; Annex A; Annex B
1.7.1 8
1.7.4.2 s) 4.1.3; 5.1.1; 6.2.1; 6.4.3; 6.4.4
3.4.7 4; 5; 6; 7; 8; Annex A, Annex B
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
International
Standard
ISO 5674
Third edition
Tractors and machinery for
2024-12
agriculture and forestry — Guards
for power take-off (PTO) drive-
shafts — Strength and wear tests
and acceptance criteria
Tracteurs et matériels agricoles et forestiers — Protecteurs
d'arbres de transmission à cardans de prise de force (p.d.f)
— Essais de résistance mécanique et d'usure et critères
d'acceptation
Reference number
ISO 5674:2024(en) © ISO 2024
ISO 5674:2024(en)
© ISO 2024
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 5674:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General test conditions . 2
4.1 Guard .2
4.2 Other conditions .2
5 Test equipment . 2
5.1 General .2
5.2 Test parameters .3
5.2.1 Measuring accuracy . .3
5.2.2 Potable and salt water .3
5.2.3 Test dust .3
6 Tests . 4
6.1 General .4
6.2 Wear test .4
6.3 Bearing corrosion test .4
6.4 Strength tests .4
6.4.1 Dynamic radial loading test at defined temperature limits .4
6.4.2 Test on guard component covering joints .5
6.4.3 Test on tubes .5
6.4.4 Dynamic swivel test .5
6.4.5 Static axial loading test at ambient temperature .8
6.4.6 Dynamic axial loading test of the bearings at ambient temperature .8
6.5 Tests at sub-zero temperature .8
6.5.1 Impact test at sub-zero temperatures .8
6.5.2 Static axial loading test at sub-zero temperatures .9
6.6 Restraining means test at ambient temperature .10
6.6.1 Conventional means of attachment .10
6.6.2 Other restraining means .10
7 Final acceptance criteria . .11
8 Test report .12
Annex A (normative) Test schedule — Test sequence for cone and tube guards .13
Annex B (normative) UV test for plastic guards . 17
Annex C (informative) Typical test report.18
Annex D (informative) Novel design guard and restraining systems tests .21
Bibliography .25

iii
ISO 5674:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and 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 2, Common tests, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 144, Tractors and machinery for agriculture and forestry,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 5674:2004), which has been technically
revised.
The main changes are as follows:
— the wording of Annex B line 8 has been clarified regarding “spectral irradiance”;
— the Type 4 Power Take-Off from ISO 500-1:2014 has been added.
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 5674:2024(en)
Introduction
This document is a type C standard as stated in ISO 12100:2010.
This document is of relevance, in particular, for the following stakeholder groups representing the market
players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.).
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in the case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
The machinery concerned and the extent to which hazards, hazardous situations or hazardous events are
covered are indicated in the Scope of this document.
When requirements of this type-C standard are different from those which are stated in type-A or type-B
standards, the requirements of this type-C standard take precedence over the requirements of the other
standards for machines that have been designed and built according to the requirements of this type-C
standard.
v
International Standard ISO 5674:2024(en)
Tractors and machinery for agriculture and forestry —
Guards for power take-off (PTO) drive-shafts — Strength and
wear tests and acceptance criteria
1 Scope
This document specifies tests for determining the strength and wear resistance of guards for power take-
off (PTO) drive- shafts on tractors and machinery used in agriculture and forestry, and their acceptance
criteria. It is intended to be used in combination with ISO 5673-1:2005.
It is applicable to the testing of PTO drive- shaft guards and their restraining means. It is not applicable to
the testing of guards designed and constructed to be used as steps.
This document is not applicable to guards for power take-off drive shafts that are manufactured before the
date of publication of this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 500-1:2014, Agricultural tractors — Rear-mounted power take-off types 1, 2, 3 and 4 — Part 1: General
specifications, safety requirements, dimensions for master shield and clearance zone
ISO 4892-1:2016, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps
ISO 4892-2:2013/Amd 1:2021, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc
lamps — Amendment 1: Classification of daylight filters
ISO 5673-1:2005, Agricultural tractors and machinery — Power take-off drive shafts and power-input
connection — Part 1: General manufacturing and safety requirements
ISO 105-A02:1993, Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in colour
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5673-1:2005 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
minimum length
minimum distance that can be measured along the outside of the guard when held at its closed length
Note 1 to entry: For closed length, see ISO 5673-1:2005.

ISO 5674:2024(en)
3.2
maximum length
maximum distance that can be measured along the outside of the guard when held at its extended length
and bent through 90°
Note 1 to entry: For extended length, see ISO 5673-1:2005.
4 General test conditions
4.1 Guard
4.1.1 The guard shall be representative of a production model and be within the tolerances specified for
the guard. The results obtained from the sample can be used to validate guards of shorter or longer lengths,
provided the basic design remains the same. When a guard is designed for use with several drive shaft types,
a representative selection of shaft and guard combinations shall be tested.
4.1.2 If the guard is made of plastic material (or any other material susceptible to degradation by UV
radiation), it shall be validated to be resistant to degradation from UV radiation under an appropriate,
recognized method in accordance with Annex B.
4.1.3 During testing, all operating and maintenance instructions specified for the shaft and guard shall be
complied with, except where specifically mentioned by this document.
4.1.4 The guard shall be tested in conjunction with a PTO drive shaft of between 900 mm and 1 010 mm
closed length for which it is intended. The same guard shall be used throughout all the tests.
4.2 Other conditions
4.2.1 If specified in this document that the PTO drive shaft shall be rotating, its rotational frequency shall
be 1 300 r/min for PTO drive shafts designed to be used for Type 4 PTO and 1 000 r/min for all other PTO
drive shafts.
4.2.2 All tests shall be carried out in accordance with the schedule and in the sequence given in Annex A.
4.2.3 All tests to be carried out at ambient temperature shall be carried out at temperature between 5°C
and 35°C.
5 Test equipment
5.1 General
5.1.1 Wear test equipment shall be capable of holding the PTO drive shaft and rotating it at a frequency
of 1 300 r/min for PTO drive shafts designed to be used for Type 4 PTO and 1 000 r/min for all other PTO
drive shafts.
The shafts and guards shall be mounted as specified for operational use and only fixed by their designated
restraining device. The fixing points shall be in accordance with ISO 500-1:2014 and the equivalent machine
standard unless otherwise specified for that type of shaft. The size and shape of the wear test equipment
shall be such that an even test environment is maintained, e.g. heat and the dust specified in 5.2.3.
5.1.2 Strength test equipment shall allow the application of known loads at controlled temperatures and
at the required frequency of rotation within the tolerances stipulated in Table 1.

ISO 5674:2024(en)
5.2 Test parameters
5.2.1 Measuring accuracy
All measurements shall be within the tolerances given in Table 1 except where otherwise required by this
document.
Table 1 — Measuring accuracy
Measuring accuracy Test tolerance
Rotational speed ±0,5 % +5 %
Temperature ±1,0 °C ±5 %
Time ±0,2 % +5 %
Length ±0,5 % ±2 %
Force ±1,0 % +2 %
5.2.2 Potable and salt water
5.2.2.1 When a test requires the use of water, it shall be potable (i.e. drinking water).
5.2.2.2 When a test requires a saltwater solution, it shall be prepared by dissolving sodium chloride in
water to produce a concentration of 50 g/l ± 5 g/l. It shall not contain copper and nickel, and shall not contain
more than 0,1 % of sodium iodine and not more than 0,4 % of total impurities calculated for dry salt.
5.2.3 Test dust
5.2.3.1 The test dust shall consist of a mixture composed of equal parts, by mass, of organic and mineral dust.
5.2.3.2 The organic dust shall be ground lucerne with a maximum percentage of 12 % water and with a
maximum particle size of 2 mm. An environment of 0,5 kg/m shall be maintained.
5.2.3.3 The mineral dust shall be a simple phosphated fertilizer, and shall contain as principal elements
silicophosphates of calcium having the following characteristics:
— minimum content: 9 % of P O total (±3 %);
2 5
— other: at least 75 % of the P O total declared, soluble in a 2 % concentration of citric acid.
2 5
See Table 2.
Table 2 — Mineral dust specifications
Mesh opening of sieve Minimum fineness of grinding, after sifting
mm %
>0,063 —
>0,125 —
>0,16 75
> 0,63 96
ISO 5674:2024(en)
6 Tests
6.1 General
After each test, the condition of the guard shall be recorded, with particular reference to any fractures,
permanent deformation or detachment of components which can contribute to the deterioration of the guard.
For the test sequence, see Annex A.
The PTO drive shaft guard shall be deemed to have passed the test if
— the guard has no holes or deformation which leave the shaft unprotected,
— the guard has no breakage, crack or part separation, and
— the guard freely rotates separately from the PTO drive shaft when the PTO drive shaft is rotated.
Tests for a novel guard design are provided in Annex D.
6.2 Wear test
6.2.1 For the whole test, the shaft shall be rotating and, while rotating, shall be extended to its extended
length (see ISO 5673-1:2005), held for 1 min, then returned and held at its closed length (see ISO 5673-1:2005)
for 4 min. This shall be repeated for the duration of the test period. See Annex A for the test sequence.
Guards shall only be fixed using the normal fixing and restraining system.
Before the start and at the end of each of the wear test cycles, the torque required for the immobilization of
any part of the guard shall be measured, having first run the guard for 1 min. The torque measured shall not
exceed 2,5 N∙m per bearing race up to a maximum of 10 N∙m per complete drive shaft.
6.2.2 At the start and at the en
...