SIST EN ISO 8437-3:2021/A1:2026

• Status: Published
• Public Enquiry End Date: 31-Jul-2022
• Publication Date: 10-Jun-2026
• ICS: 43.160 - Special purpose vehicles
• Technical Committee: IMKG - Machinery for agriculture and forestry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-May-2026
• Due Date: 01-Aug-2026
• Completion Date: 11-Jun-2026
• Directive: 2006/42/EC - 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)
  OJ Ref: L 7.9.2026 OJ Date: 07-Sep-2026
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: EN ISO 8437-3:2021/A1:2026 - Snow throwers - Safety requirements and test procedures - Part 3: Ride-on snow throwers - Amendment 1 (ISO 8437-3:2019/Amd 1:2026)

• Amends: SIST EN ISO 8437-3:2021 - Snow throwers - Safety requirements and test procedures - Part 3: Ride-on snow throwers (ISO 8437-3:2019)
• Effective Date: 01-Jul-2026

SIST EN ISO 8437-3:2021/A1:2026 is the SIST publication of the amendment EN ISO 8437-3:2021/A1:2026 for ride-on snow throwers. It updates the safety requirements and test procedures for combustion engine powered ride-on snow throwers. The document is meant for manufacturers, test laboratories, and conformity assessors who need to design, check, or specify these machines.

What does SIST EN ISO 8437-3:2021/A1:2026 specify?

SIST EN ISO 8437-3:2021/A1:2026 amends EN ISO 8437-3:2021. It clarifies the scope for combustion engine powered ride-on snow throwers and updates specific requirements, one figure, and a new clause on seats and foot rests.

Part of the document	What it covers
Scope paragraph 1	Clarified applicability to combustion engine powered ride-on snow throwers
Clause 4 edits	Operator-presence control and collector/impeller housing wording
Figure 4	Replaced figure
Clause 7	Seats and foot rests
Annex ZA	Relationship with Directive 2006/42/EC

The European version also includes Annex ZA, which links the standard to the Machinery Directive for EU conformity work.

What are the key requirements of SIST EN ISO 8437-3:2021/A1:2026?

The amendment focuses on how the machine is controlled, how access to moving parts is limited, and how seating is handled. In practice, it tells designers and testers what details must be checked on the machine itself.

Scope and terminology

• The scope paragraph now states that the document specifies safety requirements applicable to combustion engine powered ride-on snow throwers. That matters because it fixes the machine type covered by the standard.
• Throughout the document, the word “tire” is replaced by “tyre”. That matters for keeping technical documentation, markings, and related texts consistent.

Operator presence and controls

• In 4.2.5.4, when the operator-presence control (OPC) is achieved by a foot pedal, a generally forward or downward motion on the foot-actuated OPC shall engage the clutch. This matters because the control action must be intuitive and predictable.
• The same subclause requires a right-foot OPC to be outboard of the service brake pedal. That matters because pedal placement affects safe operation and helps avoid accidental misuse.

Guarding and visibility

• In 4.3.1, the collector/impeller housing extension at limit A in Figure 3 must prevent line of sight between the exposed circumference of the collector/impeller and the operator position in Figure 1. In practice, this is about using the housing geometry to reduce direct exposure to the moving parts.

Seats and foot rests

• Clause 7 adds requirements related to seat dimensions, foot rest strength, and seat position, and points to ISO 5395-3:2013.4.9 for the applicable details. That means seating and support features are handled through the referenced ride-on machine provisions.

EU legal relationship

• Annex ZA explains how the standard relates to Directive 2006/42/EC. For EU machinery compliance, this annex is the part that connects the technical clauses to the Directive’s essential health and safety requirements.

What terms does SIST EN ISO 8437-3:2021/A1:2026 define?

• Operator-presence control (OPC) - A control linked to the operator being in position; here the amendment focuses on the foot-actuated form.
• Foot-actuated operator-presence control - An OPC operated by the foot, with a specified motion and pedal arrangement.
• Collector/impeller housing - The housing around the snow-collecting and throwing components, used here to limit exposure to moving parts.
• Service brake pedal - The brake pedal used as the reference point for locating the right-foot OPC.
• Ride-on snow throwers - Snow throwers intended to be operated by a seated driver.
• Annex ZA - The annex that maps the standard to Directive 2006/42/EC.

Who uses SIST EN ISO 8437-3:2021/A1:2026?

Manufacturers use it when designing ride-on snow throwers and setting the layout of controls, guards, seating, and foot rests. Test laboratories and certification bodies use it to check whether the machine matches the amended requirements.

Quality managers, buyers, and regulatory teams use it to compare products, supplier claims, and EU conformity documentation. It is especially relevant where a machine is placed on the market under Machinery Directive-related requirements.

What changed in SIST EN ISO 8437-3:2021/A1:2026 from the previous edition?

This amendment modifies EN ISO 8437-3:2021 by making these changes:

• clarifies the scope wording for combustion engine powered ride-on snow throwers
• replaces “tire” with “tyre” throughout the document
• revises 4.2.5.4 on foot-actuated operator-presence control and clutch engagement
• revises 4.3.1 on collector/impeller housing visibility
• replaces Figure 4
• adds Clause 7 on seats and foot rests with a reference to ISO 5395-3:2013.4.9

Which standards are used with SIST EN ISO 8437-3:2021/A1:2026?

The foreword says this document is intended to be used with ISO 8437-1, ISO 8437-2, and ISO 8437-4. ISO 8437-1 provides terminology and common tests, and ISO 8437-4 covers information on national and regional provisions.

Annex ZA also lists these normative references and their contribution:

• ISO 3411 - operator physical dimensions and minimum operator space envelope
• ISO 5395-3 - seating-related requirements used for the new Clause 7 reference
• ISO 8437-1 - terminology and common tests for snow throwers
• ISO 8437-4 - national and regional provisions for snow throwers
• ISO 12100 - general principles for risk assessment and risk reduction

What does the SIST EN ISO 8437-3:2021/A1:2026 document contain?

The document is a focused amendment, not a full restatement of the base standard. It contains the revised scope wording, the updated operator-control and housing text, the replacement figure, and the new Clause 7 on seats and foot rests.

It also contains the European foreword and Annex ZA. Annex ZA includes the correspondence between the standard and Directive 2006/42/EC, plus the table of normative references with their European publications.

SLOVENSKI STANDARD
01-julij-2026
Snežne freze - Varnostne zahteve in preskusni postopki - 3. del: Snežne freze s
sedežem za voznika - Dopolnilo A1 (ISO 8437-3:2019/Amd 1:2026)
Snow throwers - Safety requirements and test procedures - Part 3: Ride-on snow
throwers - Amendment 1 (ISO 8437-3:2019/Amd 1:2026)
Schneefräsen - Sicherheitsanforderungen und Prüfverfahren - Teil 3: Schneefräsen mit
Fahrersitz - Änderung 1 (ISO 8437-3:2019/Amd 1:2026)
Chasse-neige - Exigences de sécurité et essais - Partie 3: Chasse-neige à conducteur
porté - Amendement 1 (ISO 8437-3:2019/Amd 1:2026)
Ta slovenski standard je istoveten z: EN ISO 8437-3:2021/A1:2026
ICS:
43.160 Vozila za posebne namene Special purpose vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 8437-3:2021/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2026
EUROPÄISCHE NORM
ICS 43.160
English Version
Snow throwers - Safety requirements and test procedures
- Part 3: Ride-on snow throwers - Amendment 1 (ISO
8437-3:2019/Amd 1:2026)
Chasse-neige - Exigences de sécurité et essais - Partie Schneefräsen - Sicherheitsanforderungen und
3: Chasse-neige à conducteur porté - Amendement 1 Prüfverfahren - Teil 3: Schneefräsen mit Fahrersitz -
(ISO 8437-3:2019/Amd 1:2026) Änderung 1 (ISO 8437-3:2019/Amd 1:2026)
This amendment A1 modifies the European Standard EN ISO 8437-3:2021; it was approved by CEN on 23 April 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant 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 amendment 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8437-3:2021/A1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive2006/42/EC aimed to be covered . 4

European foreword
This document (EN ISO 8437-3:2021/A1:2026) 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 Amendment to the European Standard EN ISO 8437-3:2021 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by November 2026,
and conflicting national standards shall be withdrawn at the latest by November 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 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 8437-3:2019/Amd 1:2026 has been approved by CEN as EN ISO 8437-3:2021/A1:2026
without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive2006/42/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) of this Remarks/Notes
Requirements of Directive EN
2006/42/EC
1. ESSENTIAL HEALTH AND
SAFETY REQUIREMENTS
1.1.2. Principles of safety
integration
1.1.2(a) 4,5,6
1.1.2(c) 4,5,6, annex A
1.1.2(d) (if relevant) 5, A.2.3
1.1.2(e) (if relevant) 5, A.2.6
1.1.3. Materials and products 4.3, 4.4, 4.5, 5, 6.1, 6.2
1.1.5. Design of machinery to 4.2, 4.4, 4.5, 4.6, 5, 6.
facilitate its handling
1.1.6. Ergonomics 4.2, 5, 6
1.1.7. Operating positions 4.2, 4.3.3, 5
1.1.8. Seating 6
1.2. CONTROL SYSTEMS
1.2.1. Safety and reliability of 4.2, 5, 6
control systems
1.2.2. Control devices 4.2, 5, 6
1.2.3. Starting 4.2.2.1
1.2.4.1. Normal stop 4.2.2.2, 6.1.
The relevant Essential Clause(s)/sub-clause(s) of this Remarks/Notes
Requirements of Directive EN
2006/42/EC
1.2.4.2. Operational stop 4.2.2.2, 6.2.
1.2.4.4. Assembly of machinery 4.2.8, 4.2.3.3
1.2.5. Selection of control or 4.2.3, 4.2.4, 4.2.5, 4.2.6, 4.2.7 and
operating modes 4.2.8
1.2.6. Failure of the power 4.2.2.1, 4.2.2.5, 4.2.8.2
supply
1.3. PROTECTION AGAINST
MECHANICAL HAZARDS
1.3.1. Risk of loss of stability 6.3.
1.3.2. Risk of break-up during 4.3.1
operation
1.3.3. Risks due to falling or 4.3.1
ejected objects
1.3.4. Risks due to surfaces, 4.1, 4.3.1, 4.3.2
edges or angles
1.3.6. Risks related to variations 4.2.2.1, 4.2.2.3, 4.2.2.4, 4.2.2.6
in operating conditions
1.3.7. Risks related to moving 4.2.3, 4.3
parts
1.3.8.1. Moving transmission 4.3, 4.6
parts
1.3.8.2. Moving parts involved in 4.3.
the process
1.3.9. Risks of uncontrolled 4.2.3, 4.3, 5, 6
movements
1.4. REQUIRED
CHARACTERISTICS OF GUARDS
AND PROTECTIVE DEVICES
1.4.1. General requirements 4.3
1.4.2.1. Fixed guards 4.3, 4.6
1.4.2.3. Adjustable guards 4.3
restricting access
1.4.3. Special requirements for 4.2.1, 4.2.3.1 and 4.2.5.4
protective devices
1.5. RISKS DUE TO OTHER
HAZARDS
1.5.1. Electricity supply 4.5.
1.5.2. Static electricity 4.3
The relevant Essential Clause(s)/sub-clause(s) of this Remarks/Notes
Requirements of Directive EN
2006/42/EC
1.5.3. Energy supply other than 4.4
electricity
1.5.5. Extreme temperatures 4.3
1.5.6. Fire 4.4, 4.5
1.5.7. Explosion 4.4, 4.5
1.5.8. Noise 4.9.
1.5.9. Vibrations 4.10.
1.5.10. Radiation 4.8
1.5.11. External radiation 4.8
1.5.13. Emissions of hazardous 4.3.3, 4.4, 5
materials and substances
...