Snow throwers - Safety requirements and test procedures - Part 2: Pedestrian-controlled snow throwers (ISO 8437-2:2019)

This document specifies safety requirements applicable to combustion engine powered pedestrian-controlled snow throwers. It is intended to be used with ISO 8437-1 and ISO 8437-4 to achieve the full requirements and means of verification for pedestrian-controlled snow throwers.
The ISO 8437 series deals with significant hazards, hazardous situations and events relevant to snow throwers used as intended and under the conditions reasonably foreseeable by the manufacturer.
It does not apply to the following:
— electrically powered and battery powered snow throwers;
— hand-held snow throwers;
— airport or highway snow removal machines and equipment;
— machines intended for use in potentially explosive atmospheres.
It does not deal with hazards related to the following:
— battery circuits exceeding 42 V;
— mains connected starting motor;
— magneto grounding circuits;
— working environment;
— electromagnetic compatibility.
The ISO 8437 series is not applicable to machines that were manufactured before the date of its publication.

Schneefräsen - Sicherheitsanforderungen und Prüfverfahren - Teil 2: Handgeführte Schneefräsen (ISO 8437-2:2019)

Dieser Teil der ISO 8437 bestimmt Sicherheitsanforderungen und Prüfungsverfahren für mitgängergesteuerte Schneefräsen mit Verbrennungsmotoren.
Diese Europäische Norm behandelt die für Schneefräsen zutreffenden signifikanten Gefährdungen, Gefährdungssituationen und -ereignisse, bei denen die Maschine bestimmungsgemäß genutzt wird und unter Bedingungen der fehlerhaften Nutzung, die vom Hersteller vernünftigerweise vorhersehbar sind.
Diese Internationale Norm gilt nicht für:
   elektrisch betriebene und batteriebetriebene Schneefräsen
   tragbare Schneefräsen
   Schneeräummaschinen und Geräte für Flughäfen oder Autobahnen
   Maschinen zur Verwendung in explosionsgefährdeten Bereichen
Diese Internationale Norm behandelt keine Gefährdungen in Bezug auf:
   Batteriestromkreise, die 42 V überschreiten;
   Stromnetzen, die mit dem Anwurfmotor verbunden werden
   Erdungsschaltkreise des Magnetzünders;
   Arbeitsumgebungen;
   die elektromagnetische Verträglichkeit
Diese Internationale Norm gilt nur für Maschinen, die nach dem Datum der Veröffentlichung dieser Norm hergestellt wurden.

Chasse-neige - Exigences de sécurité et essais - Partie 2: Chasse-neige à conducteur à pied (ISO 8437-2:2019)

Le présent document spécifie les exigences de sécurité qui s'appliquent aux chasse-neige à moteur à combustion à conducteur à pied. Il est destiné à être utilisé avec l'ISO 8437‑1 et l'ISO 8437‑4 afin de se conformer pleinement aux exigences et mettre en œuvre tous les moyens de vérification pour les chasse-neige à conducteur à pied.
La série ISO 8437 traite des phénomènes dangereux, des situations dangereuses et des événements dangereux significatifs applicables aux chasse-neige lorsqu'ils sont utilisés comme prévu et dans des conditions raisonnablement prévisibles par le fabricant.
Elle ne s'applique pas:
— aux chasse-neige électriques et à batterie;
— aux chasse-neige portatifs;
— aux machines et au matériel de déneigement pour aéroports ou autoroutes;
— aux machines destinées à être utilisées dans des atmosphères explosibles.
Elle ne traite pas des phénomènes dangereux associés:
— aux circuits de batterie dépassant 42 V;
— aux démarreurs raccordés à l'alimentation secteur;
— aux circuits de mise à la masse de la magnéto;
— à l'environnement de travail;
— à la compatibilité électromagnétique.
La série ISO 8437 ne s'applique pas aux machines fabriquées avant sa date de publication.

Snežne freze - Varnostne zahteve in preskusni postopki - 2. del: Ročno upravljane snežne freze (ISO 8437-2:2019)

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
21-Apr-2021
Completion Date
21-Apr-2021

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SLOVENSKI STANDARD
SIST EN ISO 8437-2:2021
01-junij-2021

Snežne freze - Varnostne zahteve in preskusni postopki - 2. del: Ročno upravljane

snežne freze (ISO 8437-2:2019)

Snow throwers - Safety requirements and test procedures - Part 2: Pedestrian controlled

snow throwers (ISO 8437-2:2019)
Schneefräsen - Sicherheitsanforderungen und Prüfverfahren - Teil 2: Handgeführte
Schneefräsen (ISO 8437-2:2019)

Chasse-neige - Exigences de sécurité et essais - Partie 2: Chasse-neige à conducteur à

pied (ISO 8437-2:2019)
Ta slovenski standard je istoveten z: EN ISO 8437-2:2021
ICS:
43.160 Vozila za posebne namene Special purpose vehicles
SIST EN ISO 8437-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 8437-2:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 8437-2:2021
EN ISO 8437-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 43.160
English Version
Snow throwers - Safety requirements and test procedures
- Part 2: Pedestrian-controlled snow throwers (ISO 8437-
2:2019)

Chasse-neige - Exigences de sécurité et essais - Partie Schneefräsen - Sicherheitsanforderungen und

2: Chasse-neige à conducteur à pied (ISO 8437-2:2019) Prüfverfahren - Teil 2: Handgeführte Schneefräsen (ISO

8437-2:2019)
This European Standard was approved by CEN on 9 February 2019.

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, Turkey 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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8437-2:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 8437-2:2021
EN ISO 8437-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 8437-2:2021
EN ISO 8437-2:2021 (E)
European foreword

This document (EN ISO 8437-2:2021) 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 October 2021, and conflicting national standards shall

be withdrawn at the latest by October 2021.

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.

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, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 8437-2:2019 has been approved by CEN as EN ISO 8437-2:2021 without any

modification.
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SIST EN ISO 8437-2:2021
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SIST EN ISO 8437-2:2021
INTERNATIONAL ISO
STANDARD 8437-2
First edition
2019-07
Snow throwers — Safety requirements
and test procedures —
Part 2:
Pedestrian-controlled snow throwers
Chasse-neige — Exigences de sécurité et essais —
Partie 2: Chasse-neige à conducteur à pied
Reference number
ISO 8437-2:2019(E)
ISO 2019
---------------------- Page: 7 ----------------------
SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Requirements for pedestrian-controlled snow thrower safety ........................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Controls ......................................................................................................................................................................................................... 2

4.2.1 General...................................................................................................................................................................................... 2

4.2.2 Engine stopping and starting ................................................................................................................................ 5

4.2.3 Collector and impeller control ............................................................................................................................. 6

4.2.4 Self-propelled pedestrian-controlled snow throwers ..................................................................... 7

4.3 Guards, shields, chutes, deflectors and housings ...................................................................................................... 7

4.3.1 General...................................................................................................................................................................................... 7

4.3.2 Hot surfaces.......................................................................................................................................................................10

4.3.3 Engine exhaust................................................................................................................................................................10

4.3.4 Snow clean-out tool ....................................................................................................................................................10

4.4 Fuel .................................................................................................................................................................................................................11

4.4.1 Fuel tank overfill test ................................................................................................................................................11

4.4.2 Fuel line axial pull test .............................................................................................................................................11

4.5 Electrical equipment: battery powered circuits (not including magneto grounding

circuits) .......................................................................................................................................................................................................11

4.5.1 Insulated cables .............................................................................................................................................................11

4.5.2 Battery installation .....................................................................................................................................................11

4.5.3 Overload protection ...................................................................................................................................................11

4.5.4 Terminals and non-insulated electrical parts ......................................................................................11

4.6 Power drives ..........................................................................................................................................................................................11

4.7 Probe test ..................................................................................................................................................................................................12

4.7.1 Test procedure ................................................................................................................................................................12

4.7.2 Test acceptance ..............................................................................................................................................................12

4.8 Electromagnetic immunity ........................................................................................................................................................13

4.9 Noise .............................................................................................................................................................................................................13

4.10 Vibration ....................................................................................................................................................................................................13

5 Instructions for use ........................................................................................................................................................................................13

5.1 Instruction handbook ....................................................................................................................................................................13

5.2 Markings ....................................................................................................................................................................................................13

5.3 Warnings ...................................................................................................................................................................................................13

Annex A (normative) Instruction handbook .............................................................................................................................................14

Bibliography .............................................................................................................................................................................................................................17

© ISO 2019 – All rights reserved iii
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
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

constitute an endorsement.

For an explanation on 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 the following

URL: 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 13, Powered lawn and garden equipment.

This first edition of ISO 8437-2, together with ISO 8437-1, ISO 8437-3 and ISO 8437-4, cancels and

replaces ISO 8437:1989, which has been technically revised. It also incorporates the Amendment

ISO 8437:1989/Amd.1:1997.
A list of all parts in the ISO 8437 series can be found on the ISO website.

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 2019 – All rights reserved
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
Introduction
The structure of safety standards in the field of machinery is as follows.

a) Type-A standards (basic standards) give basic concepts, principles for design and general aspects

that can be applied to machinery.

b) Type-B standards (generic safety standards) deal with one or more safety aspects or safeguards

that can be used across a wide range of machinery:

1) type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature,

noise);

2) type-B2 standards on safeguards (e.g. two-handed controls, interlocking devices, pressure

sensitive devices, guards).

c) Type-C standards (machinery safety standards) deal with detailed safety requirements for a

particular machine or group of machines.
This document is a type-C standard as stated in ISO 12100.

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 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 provisions of this type-C standard are different from those which are stated in type-A or type-B

standards, the provisions of this type-C standard shall take precedence over the provisions of the other

standards for machines that have been designed and built according to the provisions of this type-C

standard.
© ISO 2019 – All rights reserved v
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SIST EN ISO 8437-2:2021
---------------------- Page: 12 ----------------------
SIST EN ISO 8437-2:2021
INTERNATIONAL STANDARD ISO 8437-2:2019(E)
Snow throwers — Safety requirements and test
procedures —
Part 2:
Pedestrian-controlled snow throwers
1 Scope

This document specifies safety requirements applicable to combustion engine powered pedestrian-

controlled snow throwers. It is intended to be used with ISO 8437-1 and ISO 8437-4 to achieve the full

requirements and means of verification for pedestrian-controlled snow throwers.

The ISO 8437 series deals with significant hazards, hazardous situations and events relevant to snow

throwers used as intended and under the conditions reasonably foreseeable by the manufacturer.

It does not apply to the following:
— electrically powered and battery powered snow throwers;
— hand-held snow throwers;
— airport or highway snow removal machines and equipment;
— machines intended for use in potentially explosive atmospheres.
It does not deal with hazards related to the following:
— battery circuits exceeding 42 V;
— mains connected starting motor;
— magneto grounding circuits;
— working environment;
— electromagnetic compatibility.

The ISO 8437 series is not applicable to machines that were manufactured before the date of its

publication.
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 3411:2007, Earth-moving machinery — Physical dimensions of operators and minimum operator space

envelope

ISO 8437-1:2019, Snow throwers — Safety requirements and test procedures — Part 1: Terminology and

common tests

ISO 8437-4:2019, Snow throwers — Safety requirements and test procedures — Part 4: Information on

national and regional provisions

ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction

© ISO 2019 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions in ISO 12100 and ISO 8437-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Requirements for pedestrian-controlled snow thrower safety
4.1 General

The machines shall comply with the safety requirements and/or protective measures of this clause.

In addition, the machine shall be designed in accordance with the principles of ISO 12100 for hazards

relevant but not significant that are not dealt with by this document (e.g. sharp edges on the outside of

the machine).
4.2 Controls
4.2.1 General

Operator controls shall be located within, and have a range of movement which remains within, the

operator control position given in Figure 1, except for
— engine controls,
— snow discharge chute, and
— snow discharge deflector.
Compliance shall be checked by inspection and measurement.

The controls shall be designed such that they can be operated by an operator with and without arctic

mittens (see Figure 2).
Compliance shall be checked by functional test.

No controls shall be in any hazard zone (see Figure 1). The discharge hazard zone shall be limited by

a line tangent to, or in line with, the inside walls of the discharge chute. The discharge hazard zone

moves as the discharge chute is moved from side to side. The operator position shall not intersect the

discharge hazard zone.
Compliance shall be checked by inspection and functional test.

Controls where the purpose is not obvious to the user shall have the function, direction and/or method

of operation clearly identified by a durable label or mark.

Compliance shall be checked by inspection and labels shall be tested in accordance with

ISO 8437-1:2019, 5.3

Detailed instructions on the operation of all controls shall be provided in an instruction handbook. (see

Annex A).
Compliance shall be checked by inspection.
2 © ISO 2019 – All rights reserved
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
a) Single-stage, top view
© ISO 2019 – All rights reserved 3
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
b) Two stage, top view
Key
A operator control position D collector hazard zone
B operator position E discharge hazard zone
C barrier F discharge limit

Figure 1 — Pedestrian-controlled snow throwers: operator position, operator control position,

and hazard zones
4 © ISO 2019 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
Key
A pressed flat
NOTE 1 All dimensions approximate, without hand in glove.
NOTE 2 Material: buckskin outer shell with knit liner.
Figure 2 — Arctic mitten
4.2.2 Engine stopping and starting
4.2.2.1 Starting device

A switch operated by a removable key, or a similar device, shall be provided to prevent unauthorized

starting of the engine unless a manual starter (such as an integral starter rope) is the only means of

starting the engine. Any engine starting device shall require intentional activation in order to start the

engine. A starter operated by means of a loose rope shall not be allowed.
Compliance shall be checked by inspection and functional test.
4.2.2.2 Stopping device

An engine stopping device shall be provided. The device shall not depend on sustained manual pressure

for its continued operation. An emergency stop device is not required.
Compliance shall be checked by inspection and functional test.
4.2.2.3 Hand-operated

The direction of motion for a handle-mounted engine speed hand-lever control shall be

a) generally forward or upward, or both, to increase speed, and
b) generally rearward or downward, or both, to decrease speed.
Compliance shall be checked by inspection.
© ISO 2019 – All rights reserved 5
---------------------- Page: 17 ----------------------
SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
4.2.2.4 Drive interlock for starting
A means shall be provided to prevent starting of the engine unless
a) the collector and impeller drive are disengaged, and
b) the traction drive is disengaged or in a neutral position.

Such means shall not be required on a traction drive or impeller/collector drive that is equipped

with operator-presence controls for the traction drive and impeller/collector drive. If the only engine

starting device is located behind the barrier that restrains the operator of reaching moving parts (see

Figure 1), the impeller/collector drive need not be disengaged during starting.
Compliance shall be checked by inspection and functional test.
4.2.2.5 Engine speed

For regional and national requirements on engine speed, see ISO 8437-4:2019, Clause 5.

4.2.3 Collector and impeller control
4.2.3.1 Operator-presence control

A means shall be provided to automatically stop the impeller and/or collector when the operator leaves

the operator position. The impeller and/or collector may resume operation upon reactivation of the

operator-presence control.

The operator-presence control shall conform to well-tried principles and applies well-tried components.

A “well-tried component” for a safety-related application is a component which has been either

a) widely used in the past with successful results in similar applications, or

b) made and verified using principles which demonstrate its suitability and reliability for safety-

related applications.

Newly developed components and safety principles may be considered as equivalent to “well-tried” if

they fulfil the conditions of b).
Compliance shall be checked by inspection and functional test.
4.2.3.2 Stopping time

The impeller and/or collector shall stop within 5 s and comply with 4.2.3.4 when the control is

disengaged.

The engine shall be set at the equipment manufacturer’s maximum specified speed. The control shall be

fixed to maintain the maximum speed.

Compliance shall be checked by inspection, measurement and test in accordance with 4.2.3.4.

4.2.3.3 Impeller or traction engagement control

If a traction drive is provided separate from the collector and impeller drive, a means shall also be

provided to permit engagement of the impeller without engagement of the traction drive.

Compliance shall be checked by inspection and functional test.
6 © ISO 2019 – All rights reserved
---------------------- Page: 18 ----------------------
SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
4.2.3.4 Impeller control tests
4.2.3.4.1 Test procedure

Stopping time shall be measured from the initiation of a stop command from the maximum speed

achievable by means of the operator’s engine speed control.

When collector and impeller stopping is achieved by means of a power disconnecting device (e.g. clutch),

the engine shall be run for 15 min uninterrupted, with controls in the disengaged position. The engine

shall be operated at the maximum operating speed obtained by the operator control.

This test is not required if a means is provided to automatically stop the engine when the operator

leaves the operator position.
4.2.3.4.2 Test acceptance
The criteria for failure shall be as follows.

— For all machines, the measured stopping time for the collector and/or impeller exceeds 5 s.

— For machines with a power disconnection device (e.g. clutch), the impeller and/or collector revolve

more than 3 revolutions during the 15 min test period with the control in the disengaged position.

Compliance shall be checked by inspection.
4.2.4 Self-propelled pedestrian-controlled snow throwers
4.2.4.1 Traction drive

A traction drive engagement control shall be provided. If the control is not a squeeze-grip control, it

shall move in the direction of intended travel for engagement. A means shall be provided to permit the

machine to be transported under its own power without impeller engagement.
Compliance shall be checked by inspection and functional test.
4.2.4.2 Reverse traction control

The reverse traction-engagement control shall be an operator-presence (normally off) control.

Compliance shall be checked by inspection and functional test.
4.3 Guards, shields, chutes, deflectors and housings
4.3.1 General

All guards, shields, chutes, deflectors and housings shall be designed to prevent removal from the

machine without tools.

An adjustable snow discharge chute shall be provided to control the direction of discharge. Non-metallic

discharge chutes shall pass the test in ISO 8437-1:2019, 4.2.

Adjustable snow discharge deflectors shall be provided to direct the flow of snow discharge leaving

the discharge chute. Non-metallic discharge deflectors shall pass the test in ISO 8437-1:2019, 4.2. The

deflector may be part of the discharge chute.

The discharge limit shall not encroach into the operator position, as illustrated in Figure 1.

An unperforated collector/impeller housing shall cover the top, rear, and sides of the collector/impeller

as shown in Figure 3. The s
...

SLOVENSKI STANDARD
SIST EN ISO 8437-2:2021
01-junij-2021

Snežne freze - Varnostne zahteve in preskusni postopki - 2. del: Ročno upravljane

snežne freze (ISO 8437-2:2019)

Snow throwers - Safety requirements and test procedures - Part 2: Pedestrian controlled

snow throwers (ISO 8437-2:2019))
Schneefräsen - Sicherheitsanforderungen und Prüfverfahren - Teil 2: Handgeführte
Schneefräsen (ISO 8437-2:2019)

Chasse-neige - Exigences de sécurité et essais - Partie 2: Chasse-neige à conducteur à

pied (ISO 8437-2:2019)
Ta slovenski standard je istoveten z: EN ISO 8437-2:2021
ICS:
43.160 Vozila za posebne namene Special purpose vehicles
SIST EN ISO 8437-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 8437-2:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 8437-2:2021
EN ISO 8437-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 43.160
English Version
Snow throwers - Safety requirements and test procedures
- Part 2: Pedestrian-controlled snow throwers (ISO 8437-
2:2019)

Chasse-neige - Exigences de sécurité et essais - Partie Schneefräsen - Sicherheitsanforderungen und

2: Chasse-neige à conducteur à pied (ISO 8437-2:2019) Prüfverfahren - Teil 2: Handgeführte Schneefräsen (ISO

8437-2:2019)
This European Standard was approved by CEN on 9 February 2019.

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, Turkey 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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8437-2:2021 E

worldwide for CEN national Members.
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SIST EN ISO 8437-2:2021
EN ISO 8437-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 8437-2:2021
EN ISO 8437-2:2021 (E)
European foreword

This document (EN ISO 8437-2:2021) 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 October 2021, and conflicting national standards shall

be withdrawn at the latest by October 2021.

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.

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, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 8437-2:2019 has been approved by CEN as EN ISO 8437-2:2021 without any

modification.
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SIST EN ISO 8437-2:2021
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SIST EN ISO 8437-2:2021
INTERNATIONAL ISO
STANDARD 8437-2
First edition
2019-07
Snow throwers — Safety requirements
and test procedures —
Part 2:
Pedestrian-controlled snow throwers
Chasse-neige — Exigences de sécurité et essais —
Partie 2: Chasse-neige à conducteur à pied
Reference number
ISO 8437-2:2019(E)
ISO 2019
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Requirements for pedestrian-controlled snow thrower safety ........................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Controls ......................................................................................................................................................................................................... 2

4.2.1 General...................................................................................................................................................................................... 2

4.2.2 Engine stopping and starting ................................................................................................................................ 5

4.2.3 Collector and impeller control ............................................................................................................................. 6

4.2.4 Self-propelled pedestrian-controlled snow throwers ..................................................................... 7

4.3 Guards, shields, chutes, deflectors and housings ...................................................................................................... 7

4.3.1 General...................................................................................................................................................................................... 7

4.3.2 Hot surfaces.......................................................................................................................................................................10

4.3.3 Engine exhaust................................................................................................................................................................10

4.3.4 Snow clean-out tool ....................................................................................................................................................10

4.4 Fuel .................................................................................................................................................................................................................11

4.4.1 Fuel tank overfill test ................................................................................................................................................11

4.4.2 Fuel line axial pull test .............................................................................................................................................11

4.5 Electrical equipment: battery powered circuits (not including magneto grounding

circuits) .......................................................................................................................................................................................................11

4.5.1 Insulated cables .............................................................................................................................................................11

4.5.2 Battery installation .....................................................................................................................................................11

4.5.3 Overload protection ...................................................................................................................................................11

4.5.4 Terminals and non-insulated electrical parts ......................................................................................11

4.6 Power drives ..........................................................................................................................................................................................11

4.7 Probe test ..................................................................................................................................................................................................12

4.7.1 Test procedure ................................................................................................................................................................12

4.7.2 Test acceptance ..............................................................................................................................................................12

4.8 Electromagnetic immunity ........................................................................................................................................................13

4.9 Noise .............................................................................................................................................................................................................13

4.10 Vibration ....................................................................................................................................................................................................13

5 Instructions for use ........................................................................................................................................................................................13

5.1 Instruction handbook ....................................................................................................................................................................13

5.2 Markings ....................................................................................................................................................................................................13

5.3 Warnings ...................................................................................................................................................................................................13

Annex A (normative) Instruction handbook .............................................................................................................................................14

Bibliography .............................................................................................................................................................................................................................17

© ISO 2019 – All rights reserved iii
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
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

constitute an endorsement.

For an explanation on 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 the following

URL: 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 13, Powered lawn and garden equipment.

This first edition of ISO 8437-2, together with ISO 8437-1, ISO 8437-3 and ISO 8437-4, cancels and

replaces ISO 8437:1989, which has been technically revised. It also incorporates the Amendment

ISO 8437:1989/Amd.1:1997.
A list of all parts in the ISO 8437 series can be found on the ISO website.

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 2019 – All rights reserved
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
Introduction
The structure of safety standards in the field of machinery is as follows.

a) Type-A standards (basic standards) give basic concepts, principles for design and general aspects

that can be applied to machinery.

b) Type-B standards (generic safety standards) deal with one or more safety aspects or safeguards

that can be used across a wide range of machinery:

1) type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature,

noise);

2) type-B2 standards on safeguards (e.g. two-handed controls, interlocking devices, pressure

sensitive devices, guards).

c) Type-C standards (machinery safety standards) deal with detailed safety requirements for a

particular machine or group of machines.
This document is a type-C standard as stated in ISO 12100.

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 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 provisions of this type-C standard are different from those which are stated in type-A or type-B

standards, the provisions of this type-C standard shall take precedence over the provisions of the other

standards for machines that have been designed and built according to the provisions of this type-C

standard.
© ISO 2019 – All rights reserved v
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SIST EN ISO 8437-2:2021
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SIST EN ISO 8437-2:2021
INTERNATIONAL STANDARD ISO 8437-2:2019(E)
Snow throwers — Safety requirements and test
procedures —
Part 2:
Pedestrian-controlled snow throwers
1 Scope

This document specifies safety requirements applicable to combustion engine powered pedestrian-

controlled snow throwers. It is intended to be used with ISO 8437-1 and ISO 8437-4 to achieve the full

requirements and means of verification for pedestrian-controlled snow throwers.

The ISO 8437 series deals with significant hazards, hazardous situations and events relevant to snow

throwers used as intended and under the conditions reasonably foreseeable by the manufacturer.

It does not apply to the following:
— electrically powered and battery powered snow throwers;
— hand-held snow throwers;
— airport or highway snow removal machines and equipment;
— machines intended for use in potentially explosive atmospheres.
It does not deal with hazards related to the following:
— battery circuits exceeding 42 V;
— mains connected starting motor;
— magneto grounding circuits;
— working environment;
— electromagnetic compatibility.

The ISO 8437 series is not applicable to machines that were manufactured before the date of its

publication.
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 3411:2007, Earth-moving machinery — Physical dimensions of operators and minimum operator space

envelope

ISO 8437-1:2019, Snow throwers — Safety requirements and test procedures — Part 1: Terminology and

common tests

ISO 8437-4:2019, Snow throwers — Safety requirements and test procedures — Part 4: Information on

national and regional provisions

ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction

© ISO 2019 – All rights reserved 1
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions in ISO 12100 and ISO 8437-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Requirements for pedestrian-controlled snow thrower safety
4.1 General

The machines shall comply with the safety requirements and/or protective measures of this clause.

In addition, the machine shall be designed in accordance with the principles of ISO 12100 for hazards

relevant but not significant that are not dealt with by this document (e.g. sharp edges on the outside of

the machine).
4.2 Controls
4.2.1 General

Operator controls shall be located within, and have a range of movement which remains within, the

operator control position given in Figure 1, except for
— engine controls,
— snow discharge chute, and
— snow discharge deflector.
Compliance shall be checked by inspection and measurement.

The controls shall be designed such that they can be operated by an operator with and without arctic

mittens (see Figure 2).
Compliance shall be checked by functional test.

No controls shall be in any hazard zone (see Figure 1). The discharge hazard zone shall be limited by

a line tangent to, or in line with, the inside walls of the discharge chute. The discharge hazard zone

moves as the discharge chute is moved from side to side. The operator position shall not intersect the

discharge hazard zone.
Compliance shall be checked by inspection and functional test.

Controls where the purpose is not obvious to the user shall have the function, direction and/or method

of operation clearly identified by a durable label or mark.

Compliance shall be checked by inspection and labels shall be tested in accordance with

ISO 8437-1:2019, 5.3

Detailed instructions on the operation of all controls shall be provided in an instruction handbook. (see

Annex A).
Compliance shall be checked by inspection.
2 © ISO 2019 – All rights reserved
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
a) Single-stage, top view
© ISO 2019 – All rights reserved 3
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
b) Two stage, top view
Key
A operator control position D collector hazard zone
B operator position E discharge hazard zone
C barrier F discharge limit

Figure 1 — Pedestrian-controlled snow throwers: operator position, operator control position,

and hazard zones
4 © ISO 2019 – All rights reserved
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
Key
A pressed flat
NOTE 1 All dimensions approximate, without hand in glove.
NOTE 2 Material: buckskin outer shell with knit liner.
Figure 2 — Arctic mitten
4.2.2 Engine stopping and starting
4.2.2.1 Starting device

A switch operated by a removable key, or a similar device, shall be provided to prevent unauthorized

starting of the engine unless a manual starter (such as an integral starter rope) is the only means of

starting the engine. Any engine starting device shall require intentional activation in order to start the

engine. A starter operated by means of a loose rope shall not be allowed.
Compliance shall be checked by inspection and functional test.
4.2.2.2 Stopping device

An engine stopping device shall be provided. The device shall not depend on sustained manual pressure

for its continued operation. An emergency stop device is not required.
Compliance shall be checked by inspection and functional test.
4.2.2.3 Hand-operated

The direction of motion for a handle-mounted engine speed hand-lever control shall be

a) generally forward or upward, or both, to increase speed, and
b) generally rearward or downward, or both, to decrease speed.
Compliance shall be checked by inspection.
© ISO 2019 – All rights reserved 5
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
4.2.2.4 Drive interlock for starting
A means shall be provided to prevent starting of the engine unless
a) the collector and impeller drive are disengaged, and
b) the traction drive is disengaged or in a neutral position.

Such means shall not be required on a traction drive or impeller/collector drive that is equipped

with operator-presence controls for the traction drive and impeller/collector drive. If the only engine

starting device is located behind the barrier that restrains the operator of reaching moving parts (see

Figure 1), the impeller/collector drive need not be disengaged during starting.
Compliance shall be checked by inspection and functional test.
4.2.2.5 Engine speed

For regional and national requirements on engine speed, see ISO 8437-4:2019, Clause 5.

4.2.3 Collector and impeller control
4.2.3.1 Operator-presence control

A means shall be provided to automatically stop the impeller and/or collector when the operator leaves

the operator position. The impeller and/or collector may resume operation upon reactivation of the

operator-presence control.

The operator-presence control shall conform to well-tried principles and applies well-tried components.

A “well-tried component” for a safety-related application is a component which has been either

a) widely used in the past with successful results in similar applications, or

b) made and verified using principles which demonstrate its suitability and reliability for safety-

related applications.

Newly developed components and safety principles may be considered as equivalent to “well-tried” if

they fulfil the conditions of b).
Compliance shall be checked by inspection and functional test.
4.2.3.2 Stopping time

The impeller and/or collector shall stop within 5 s and comply with 4.2.3.4 when the control is

disengaged.

The engine shall be set at the equipment manufacturer’s maximum specified speed. The control shall be

fixed to maintain the maximum speed.

Compliance shall be checked by inspection, measurement and test in accordance with 4.2.3.4.

4.2.3.3 Impeller or traction engagement control

If a traction drive is provided separate from the collector and impeller drive, a means shall also be

provided to permit engagement of the impeller without engagement of the traction drive.

Compliance shall be checked by inspection and functional test.
6 © ISO 2019 – All rights reserved
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SIST EN ISO 8437-2:2021
ISO 8437-2:2019(E)
4.2.3.4 Impeller control tests
4.2.3.4.1 Test procedure

Stopping time shall be measured from the initiation of a stop command from the maximum speed

achievable by means of the operator’s engine speed control.

When collector and impeller stopping is achieved by means of a power disconnecting device (e.g. clutch),

the engine shall be run for 15 min uninterrupted, with controls in the disengaged position. The engine

shall be operated at the maximum operating speed obtained by the operator control.

This test is not required if a means is provided to automatically stop the engine when the operator

leaves the operator position.
4.2.3.4.2 Test acceptance
The criteria for failure shall be as follows.

— For all machines, the measured stopping time for the collector and/or impeller exceeds 5 s.

— For machines with a power disconnection device (e.g. clutch), the impeller and/or collector revolve

more than 3 revolutions during the 15 min test period with the control in the disengaged position.

Compliance shall be checked by inspection.
4.2.4 Self-propelled pedestrian-controlled snow throwers
4.2.4.1 Traction drive

A traction drive engagement control shall be provided. If the control is not a squeeze-grip control, it

shall move in the direction of intended travel for engagement. A means shall be provided to permit the

machine to be transported under its own power without impeller engagement.
Compliance shall be checked by inspection and functional test.
4.2.4.2 Reverse traction control

The reverse traction-engagement control shall be an operator-presence (normally off) control.

Compliance shall be checked by inspection and functional test.
4.3 Guards, shields, chutes, deflectors and housings
4.3.1 General

All guards, shields, chutes, deflectors and housings shall be designed to prevent removal from the

machine without tools.

An adjustable snow discharge chute shall be provided to control the direction of discharge. Non-metallic

discharge chutes shall pass the test in ISO 8437-1:2019, 4.2.

Adjustable snow discharge deflectors shall be provided to direct the flow of snow discharge leaving

the discharge chute. Non-metallic discharge deflectors shall pass the test in ISO 8437-1:2019, 4.2. The

deflector may be part of the discharge chute.

The discharge limit shall not encroach into the operator position, as illustrated in Figure 1.

An unperforated collector/impeller housing shall cover the top, rear, and sides of the collector/impeller

as shown in Figure 3. The
...

SLOVENSKI STANDARD
oSIST prEN ISO 8437-2:2016
01-junij-2016

6QHåQHIUH]H9DUQRVWQH]DKWHYHLQSUHVNXVQLSRVWRSNLGHO5RþQRXSUDYOMDQH

VQHåQHIUH]H ,62',6

Snow throwers - Safety requirements and test procedures - Part 2: Pedestrian controlled

snow throwers (ISO/DIS 8437-2:2016)
Schneefräsen - Sicherheitsanforderungen und Prüfverfahren - Teil 2: Handgeführte
Schneefräsen (ISO/DIS 8437-2:2016)

Chasse-neige - Exigences de sécurité et essais - Partie 2: Chasse-neige à conducteur à

pied (ISO/DIS 8437-2:2016)
Ta slovenski standard je istoveten z: prEN ISO 8437-2
ICS:
43.160 Vozila za posebne namene Special purpose vehicles
oSIST prEN ISO 8437-2:2016 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 8437-2:2016
---------------------- Page: 2 ----------------------
oSIST prEN ISO 8437-2:2016
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8437-2
ISO/TC 23/SC 13 Secretariat: ANSI
Voting begins on: Voting terminates on:
2016-04-07 2016-07-06
Snow throwers — Safety requirements and test
procedures —
Part 2:
Pedestrian controlled snow throwers
Chasse-neige — Exigences de sécurité et essais —
Partie 2: Chasse-neige à conducteur à pied
ICS: 43.160
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
To expedite distribution, this document is circulated as received from the
BEING ACCEPTABLE FOR INDUSTRIAL,
committee secretariat. ISO Central Secretariat work of editing and text
TECHNOLOGICAL, COMMERCIAL AND
composition will be undertaken at publication stage.
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 8437-2:2016(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2016
---------------------- Page: 3 ----------------------
oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)
Contents

Foreword................................................................................................................................................................................... 3

Introduction ............................................................................................................................................................................ 3

1 Scope ....................................................................................................................................................................................... 5

2 Normative references...................................................................................................................................................... 5

3 Terms and definitions ..................................................................................................................................................... 6

4 Requirements for pedestrian controlled snow thrower safety ................................................................... 6

Annex A (normative) .........................................................................................................................................................18

A.1 Instruction handbook................................................................................................................................................18

A.2 Markings..........................................................................................................................................................................19

A.3 Warnings .........................................................................................................................................................................20

A.4 Label durability requirements..............................................................................................................................20

Bibliography ..........................................................................................................................................................................21

2 © ISO 2016 – All rights reserved
---------------------- Page: 5 ----------------------
oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)
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. 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. www.iso.org/patents

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO's adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

ISO 8437 was prepared by Technical Committee ISO/TC 23, Tractors and Machinery for Agriculture and

Forestry, Subcommittee SC 13, Lawn and Garden Equipment.

ISO 8437 consists of the following parts under the general title Snow thrower – Safety requirements

and test procedures:
Part 1: Terminology and common tests
Part 2: Pedestrian controlled snow throwers
Part 3: Ride-on snow throwers
Part 4: National and regional provisions
Introduction
The structure of safety standards in the field of machinery is as follows:

a)Type-A standards (basic standards) give basic concepts, principles for design, and general aspects

that can be applied to machinery;
© ISO 2016 – All rights reserved 3
---------------------- Page: 6 ----------------------
oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)

b)Type-B standards (generic safety standards) deal with one or more safety aspects or safeguards that

can be used across a wide range of machinery:

 type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature,

noise);

 type-B2 standards on safeguards (e.g. two-handed controls, interlocking devices, pressure

sensitive devices, guards);

c) Type-C standards (machinery safety standards) deal with detailed safety requirements for a

particular machine or group of machines.
This international standard is a type-C standard as stated in ISO 12100.

When provisions of this type-C standard are different from those which are stated in type-A or type-B

standards, the provisions of this type-C standard shall take precedence over the provisions of the other

standards for machines that have been designed and built according to the provisions of this type-C

standard.
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oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)
Snow throwers – Safety requirements and test procedures – Part
2: Pedestrian controlled snow throwers
1 Scope

This part of ISO 8437 specifies safety requirements and test procedures applicable to combustion

engine powered pedestrian controlled snow throwers.

This standard deals with significant hazards, hazardous situations and events relevant to snow

throwers used as intended and under the conditions foreseen by the manufacturer.
This international standard does not apply to:
 electrically powered and battery powered snow throwers
 hand-held snow throwers
 airport or highway snow removal machines and equipment
 machines intended for use in potentially explosive atmospheres
This international standard does not deal with hazards related to:
 battery circuits exceeding 42 V;
 mains connected starting motor
 magneto grounding circuits;
 working environment;
 electromagnetic compatibility

This international standard is not applicable to machines which are manufactured before the date of its

publication.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO 3767 – 1 1995 Tractors, machinery for agriculture and forestry, powered lawn and

garden equipment -- Symbols for operator controls and other displays --
Part 1: Common symbols

ISO 3767 – 3 1995 Tractors, machinery for agriculture and forestry, powered lawn and

garden equipment -- Symbols for operator controls and other displays –
Part 3: Symbols for powered lawn and garden equipment

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 7000 2014 Graphical symbols for use on equipment – Registered symbols

ISO 8437 – 1 201x Snow throwers – Safety requirements and test procedures - Part 1:

Terminology and common tests
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ISO 8437 – 3 201x Snow throwers – Safety requirements and test procedures – Part 3: Ride-

on snow throwers

ISO 8437 – 4 201x Snow throwers – Safety requirements and test procedures - Part 4:

Information on national and regional provisions
Safety of machinery - Basic concepts, general principles for design -
ISO 12100 2010
Part 1: Basic terminology, methodology

ISO 13857 2008 Safety of machinery -- Safety distances to prevent hazard zones being

reached by upper and lower limbs
3 Terms and definitions

For the purposes of this document, the terms and definitions in ISO 12100 and ISO 8437-1 apply.

4 Requirements for pedestrian controlled snow thrower safety
4.1 General

The safe running of snow throwers depends on both the safety requirements as given in this clause and

the safe working conditions associated with the use of adequate personal protection equipment (PPE)

such as gloves, boots, and eye protection equipment.

The machines shall comply with the safety requirements and/or protective measures of this clause. In

addition, the machine shall be designed according to the principles of ISO 12100 for hazards relevant

but not significant, which are not dealt with by this document (e.g. sharp edges on the outside of the

machine).

Snow throwers shall also be marked according to A.2 and carry warnings according to A.3.

The instruction handbook to be provided with the snow thrower shall comply with A.1.

4.2 Controls
4.2.1 General

Except as indicated in the following list operator controls shall be located within, and have a range of

movement which remains within, the operator control position given in Figure 2:
 engine controls
 snow discharge guide control

The controls shall be designed such that they can be operated by an operator with and without artic

mittens see Figure 1.
No controls shall be in any hazard zone (see Figure 2A and 2B).

Controls, whose purpose is not obvious to the user, shall have the function, direction and/or method of

operation clearly identified by a durable label or mark.

Detailed instructions on the operation of all controls shall be provided in an instruction handbook.

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oSIST prEN ISO 8437-2:2016
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Compliance shall be checked by inspection.
Key
A Pressed Flat
Notes
1 All dimensions approximate, without hand in glove
2 Material – Buckskin outer shell with knit liner
Figure 1 – Arctic mitten
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oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)
Key
A Operator control position
B Operator position
C Barrier
D Collector hazard zone
E Discharge hazard zone
F Discharge limit

Note Discharge hazard zone shall be limited by a line tangent to, or in line with, the inside walls of the discharge chute. The

discharge hazard zone moves as the discharge chute is moved from side to side. Operator position shall not intersect

the discharge hazard zone.

Figure 2b – Operator position, operator control position, and hazard zones –Pedestrian

controlled snow throwers, single stage, top view
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oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)
Key
A Operator control position
B Operator position
C Barrier
D Collector hazard zone
E Discharge hazard zone
F Discharge limit

Note: Discharge hazard zone shall be limited by a line tangent to, or in line with, the inside walls of the discharge chute. The

discharge hazard zone moves as the discharge chute is moved from side to side. Operator position shall not intersect

the discharge hazard zone.
Figure 2b – Operator position, operator control position, and hazard zones –
Pedestrian controlled snow throwers, two stage, top view
4.2.2 Engine stopping and starting
4.2.2.1 Starting device

A switch operated by a removable key, or a similar device, shall be provided to prevent unauthorized

starting of the engine unless a manual starter (such as an integral starter rope) is the only means of

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oSIST prEN ISO 8437-2:2016
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engine starting. Any engine starting device shall require intentional activation in order to start the

engine. Snow throwers shall not be provided with a starter operated by means of a loose rope.

Compliance to be checked by inspection.
4.2.2.2 Stopping device

An engine stopping device shall be provided. The device shall not depend on sustained manual pressure

for its continued operation.
NOTE: An emergency stop device is not required.
Compliance shall be checked by inspection.
4.2.2.3 Hand operated

The direction of motion for a handle-mounted engine speed hand-lever control shall be generally

forward or upward, or both, to increase speed, and generally rearward or downward, or both, to

decrease speed.
Compliance shall be checked by inspection.
4.2.2.4 Drive interlock

A means shall be provided to prevent starting of the engine unless: (a) the impeller and collector drive

are disengaged and (b) the traction drive is disengaged or in neutral. Such means shall not be required

on a traction drive or impeller drive that is equipped with operator-presence controls. If the engine can

be started from behind the barrier that restrains the operator of reaching moving parts (see figure 2)

the impeller drive need not be disengaged.
Compliance shall be checked by inspection.
4.2.3 Impeller and collector control
4.2.3.1 Automatic stop

A means shall be provided that will automatically stop the impeller and collector when the operator

leaves the operator position. The impeller and/or collector may resume operation upon reactivation of

the operator-presence control. It shall require reactivation after stopping and shall comply with the

requirement of 4.2.3.2.
Compliance shall be checked by inspection.
4.2.3.2 Stopping time

The impeller and collector shall stop within 5 seconds, and comply with section 4.2.3.4, when the

control is disengaged.
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oSIST prEN ISO 8437-2:2016
ISO/DIS 8437-2:2016(E)
Compliance shall be checked by inspection
4.2.3.3 Impeller or traction engagement control

If a traction drive, separate from the collector and impeller drive, is provided a means shall be provided

to permit the machine to be transported under its own power without the impeller engaged. A means

shall also be provided to permit engagement of the impeller without engagement of traction drive.

Compliance shall be checked by inspection.
4.2.3.4 Impeller control tests
4.2.3.4.1 Test proce
...

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