Bsi bs en 00708 1997 (2001)

www bzfxw com BRITISH STANDARD BS EN 708 1997 Incorporating Amendment No 1 Agricultural machinery — Soil working machines with powered tools — Safety The European Standard EN 708 1996, with the incorp[.]

BRITISH STANDARD BS EN

708:1997

Incorporating Amendment No 1

Agricultural

machinery —

Soil working machines

with powered tools —

Safety

The European Standard EN 708:1996, with the incorporation of amendment

A1:2000, has the status of a British Standard

ICS 65.060.20

This British Standard, having

been prepared under the

direction of the Engineering

Sector Board, was published

under the authority of the

Standards Board and comes

into effect on

15 January 1997

© BSI 01-2001

The following BSI references

relate to the work on this

standard:

Committee reference AGE/32

Draft for comment 92/74749 DC

ISBN 0 580 27007 6

The preparation of this British Standard was entrusted to Technical Committee AGE/32, Agricultural implements and trailers, upon which the following bodies were represented:

Agricultural and Allied Workers National Trade Group Agricultural Engineers’ Association

British Fluid Power Association Department of Transport Health and Safety Executive Ministry of Agriculture, Fisheries and Food National Farmers’ Union

Silsoe College, Cranfield Institute of Technology Silsoe Research Institute

Amendments issued since publication

Amd No Date Comments

10980 January

2001 Indicated by sidelines

BS EN 708:1997

Contents

Page

This British Standard has been prepared by Technical Committee AGE/32 and is

the English language version of EN 708:1996 Agricultural machinery — Soil working machines with powered tools — Safety, including amendment A1:2000, published by the European Committee for Standardization (CEN)

The United Kingdom as a member of CEN is obliged to publish EN 708:1996 as a British Standard However attention is drawn to the fact that during the development of this European Standard the United Kingdom has consistently voted against its approval as an EN The UK believes that the standard is deficient in certain safety requirements compared with the state of the art for these machines in the UK and that in consequence the standard fails to meet some of the essential requirements of the EC Machinery Safety Directive, 89/392 and amendments, which it claims to meet

Although CEN approved EN 708:1996 for publication in its present form there is

no reference to it in the Official Journal of the European Communities It should therefore be noted that until the standard is listed in the Official Journal, compliance with it will not give automatic presumption of compliance either with the relevant essential requirements of the EC Machinery Directive or the UK Supply of Machinery (Safety) Regulations 1992 as amended in 1994

As part of BSI’s duty of care we draw attention to users of BS EN 708:1997 of our concern that the standard contains inadequate requirements for protection of personnel against unintentional contact with the powered tools specifically with

regard to clause 4.2.2 and the absence of a strength requirement for barriers and

lateral guards BSI will assume no liability whatsoever for any failure on the part

of any user of this standard to consider these aspects

Cross-references

The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue

A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 15 and a back cover

The BSI copyright notice displayed in this document indicates when the document was last issued

Sidelining in this document indicates the most recent changes by amendment

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 708

February 1996

+ A1

March 2000 ICS 65.060.20

Descriptors: Agricultural machinery, tilling equipment, safety of machines, safety requirements, accident prevention,

safety devices, locking devices, hazards, marking

English version

Agricultural machinery — Soil working machines with

powered tools — Safety

(includes amendment A1:2000)

Matériel agricole — Machines de travail du sol à

outils animés — Sécurité

(inclut l’amendement A1:2000)

Landmaschinen — Bodenbearbeitungsgeräte mit kraftbetriebenen Werkzeugen — Sicherheit (enthält Änderung A1:2000)

This European Standard was approved by CEN on 1996-01-15 Amendment A1

was approved by CEN on 2000-01-23.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 Central Secretariat 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

Central Secretariat has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium,

Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and

United Kingdom

CEN

European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

© 1996 Copyright reserved to CEN members

Ref No EN 708:1996 + A1:2000 E

Foreword

This European Standard was prepared by the

Technical Committee CEN/TC 144, Tractors and

machinery for agriculture and forestry, of which the

secretariat is held by AFNOR

This European Standard has been prepared under a

mandate given to CEN by the European

Commission and the European Free Trade

Association, and supports essential requirements of

EC Directive(s)

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

August 1996, and conflicting national standards

shall be withdrawn at the latest by August 1996

According to the CEN/CENELEC Internal

Regulations, the national standards organizations

of the following countries are bound to implement

this European Standard: Austria, Belgium,

Denmark, Finland, France, Germany, Greece,

Iceland, Ireland, Italy, Luxembourg, Netherlands,

Norway, Portugal, Spain, Sweden, Switzerland and

the United Kingdom

Foreword to amendment A1

This amendment EN 708:1996/A1:2000 to

EN 708:1996 has been prepared by 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 708:1996 shall be given the status of a national

standard, either by publication of an identical text

or by endorsement, at the latest by September 2000,

and conflicting national standards shall be

withdrawn at the latest by September 2000

This amendment to the European Standard

EN 708:1996 has been prepared under a mandate

given to CEN by the European Commission and the

European Free Trade Association, and supports

essential requirements of EU Directive(s)

For relationship with EU Directive(s), see

informative Annex ZA, which is an integral part of

this standard

According to the CEN/CENELEC Internal

Regulations, the national standards organizations

of the following countries are bound to implement

this European Standard: Austria, Belgium, Czech

Republic, Denmark, Finland, France, Germany,

Greece, Iceland, Ireland, Italy, Luxembourg,

Netherlands, Norway, Portugal, Spain, Sweden,

Switzerland and the United Kingdom

Contents

Page

4 Safety requirements and/or measures 4

4.2 Protection against hazards related to

4.3 Protection for handling and transport 6 4.4 Adjustment of the working depth 7

5 Verification of safety requirements

Annex A (normative) List of hazards 10 Annex B (informative) Examples of some

soil working machines with powered tools 14 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives 15

Figure 2 — Barrier at the front, the rear

Figure 4 — Rear protection-hinged guard 6 Figure 5 — Area where the manual controls for the adjustment of the working depth shall not

Figure B.2 — Rotary cultivator 14 Table A.1 — List of hazards 10 Table A.2 — List of hazards due to mobility 13

EN 708:1996

Introduction

The extent to which hazards are covered is indicated in the scope of this standard These hazards are

specific to soil working machines with powered tools

The hazards that are common to all agricultural machines (self-propelled, mounted, semi-mounted and

trailed) will be dealt with in a standard currently in preparation (EN 1553)

1 Scope

This standard specifies safety requirements and their verification for the design and construction of soil

working machines, mounted or trailed, with tools powered by the engine of the tractor or by an auxiliary motor It is applicable regardless of the type of movement of the tools

This standard is not applicable to:

— spading machines;

— pedestrian controlled soil working machines;

— machines where the tools are driven by movement of the machine over the ground;

— machines fitted with a retractable device, making them capable of working between two successive plants in the same row

It describes methods for elimination or reduction of risks which need specific requirements for soil working machines with powered tools It does not deal with general hazards, particularly general hazards related

to the mobility These aspects will be dealt with in a standard currently in preparation (EN 1553)

In addition, it specifies the type of information on safe working practices to be provided by the

manufacturer

The list of significant hazards dealt with in this standard is given in Annex A Annex A also indicates the hazards which have not been dealt with

NOTE The measures for safeguarding the PTO shaft are dealt with in the “Common requirements” standard being prepared by

CEN/TC 144.

Environmental aspects have not been considered in this standard

This standard applies primarily to machines which are manufactured after the date of issue of the

standard

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply

to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies

EN 292-1:1991, Safety of machinery — Basic concepts, general principles for design —

Part 1: Basic terminology, methodology

EN 292-2:1991, Safety of machinery — Basic concepts, general principles for design —

Part 2: Technical principles and specifications (and amendment A1:1995)

EN 294:1992, Safety of machinery — Safety distances to prevent danger zones being reached by the upper limbs

EN 1553:1999, Agricultural machinery — Agricultural self-propelled, mounted, semi-mounted and trailed machines — Common safety requirements

3 Definitions

For the purposes of this standard, the following definition applies:

soil working machine with powered tools

machine with powered tools designed for modifying soil structure or profile and/or for incorporating plants, crop residues or animal manure during tillage

NOTE Non-restrictive examples of such machines are given in Annex B.

4 Safety requirements and/or measures

4.1 General

Machines shall comply as appropriate with EN 292 for hazards which are not dealt with and especially with

Annex A of EN 292-2:1991/A1:1995 when EN 292 does not give precise requirements

Unless otherwise specified in this standard, the machine shall comply with the requirements of

EN 1553:1999 and with Tables 1, 3, 4 and 6 of EN 294:1992

4.2 Protection against hazards related to moving parts

4.2.1 Protection against hazards related to moving power transmission parts

To ensure protection against hazards related to accessible moving power transmission parts, the machine

shall be fitted with fixed guards (according to 3.22.1 of EN 292-1:1991).

When frequent access is foreseen, the machine shall be fitted with guards needing a tool for their opening

These guards shall remain attached to the machine when opened (for example by means of hinges) and

automatically lock in closed position without the use of a tool

If this type of guard is not used, the machine shall be fitted with:

— interlocking movable guards (according to 3.22.4 of EN 292-1:1991); or

— movable guards fitted with a device which prevents their opening so long as the parts are moving

4.2.2 Protection against unintentional contact with the tools

4.2.2.1 Machines shall be designed or guarded in such a way that any unintentional contact with the

powered tools at the front, at the rear, at the sides and on the top is avoided

— At the front, at the sides and at the rear of the accessible zone, a barrier shall be placed at a maximum

height of 400 mm from the lower tools path and at a minimum horizontal distance a of 200 mm from the

tools path (see Figure 1 and Figure 2)

On the top, the area between the barriers shall be completely guarded:

— the area which covers the tools at least up to the outer points of their path shall be guarded by an

imperforate guard;

— the area between the barriers and the edge of the top guard shall be guarded in such a way that it shall

not be possible to pass a 61 mm spherical test gauge through this area The guarding may be

achieved by a guard or any part of the machine or a combination of both

The test gauge shall be of mild steel and shall be applied by hand The machine and its guards shall be set

in the most unfavourable positions

The top guard, the barriers and the parts of the machine ensuring the guarding shall withstand a vertical

downwards load of 1 200 N The barriers shall additionally withstand the following horizontal loads:

— 600 N for machines with a horizontal axis intended to be used with a tractor whose maximum power

as given in the instruction handbook is less than or equal to 37 kW;

— 1 000 N for the other machines

These requirements shall be checked by the test procedure and the test acceptance defined in Annex B of

prEN 1553:1999

0 1

EN 708:1996

NOTE This 200 mm distance is the result of a compromise between the distances that were required in the CEN countries up until now It was noted that these distances have not been scientifically validated.

At present time this 200 mm distance leads to an improvement of the safety level in many CEN countries and consequently of the

general safety level in Europe.

This value will be reviewed by the next revision of the standard on the basis of the result of relevant studies to be carried out.

On the sides, when in the working position a guard covers the parts of the tools above the ground, then the

distance a may be less than 200 mm (see Figure 3).

At the rear when the guard is hinged, its lower edge shall, whatever its position, be at a minimum distance

d in accordance with Figure 4

Key

1 Accessible zone

2 Front

3 Rear

4 Lower hitch points

5 Forward direction (rear mounted machine)

6 Forward direction (front mounted machine)

Figure 1 — Accessible zones

Key

1 Path of the tools

2 Barrier

Dimensions in millimetres

Figure 2 — Barrier at the front, the rear and the sides

4.2.2.2 The guard at the rear may be retractable or removable, in order to permit the fitting of tools in

accordance with the instructions of the manufacturer This protection at the rear may also be assured by

other parts (e.g the frame) or by associated or combined equipment (e.g seed drills, rollers, harrows),

providing they are not power driven

4.2.2.3 When a soil working machine with powered tools can be used without associated or combined

equipment normally serving as a guard, in accordance with the instructions of the manufacturer, the

machine shall be designed in such a way that the alternative guard (supplied by the manufacturer) can be

fitted

4.3 Protection for handling and transport

The machines with folding elements shall be supplied with a mechanical locking device in the transport

position The change from the working position to the transport position and vice versa shall occur without

crushing and pinching hazard The movement of the folding elements shall be powered if the manual force

needed for the manoeuvre exceeds 250 N

The folding elements that can be manually moved shall be fitted with two handles located at a distance of

at least 300 mm from the nearest articulation These handles may be integral parts of the elements,

provided they are suitably designed and clearly identified

Key

1 Path of the tools

2 Guard

Figure 3 — Lateral guard

Dimensions in millimetres

Figure 4 — Rear protection-hinged guard