SIST EN 703:2021

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN 703:2004+A1:2009
Kmetijski stroji - Varnost - Stroji za nalaganje, mešanje in/ali rezanje ter raztros
silaže
Agricultural machinery - Safety - Silage loading, mixing and/or chopping and distributing
machines
Landmaschinen - Sicherheit - Maschinen zum Laden, Mischen und/oder Zerkleinern und
Verteilen von Silage
Matériel agricole - Sécurité - Désileuses chargeuses, mélangeuses et/ou hacheuses et
distributrices
Ta slovenski standard je istoveten z: EN 703:2021
ICS:
65.060.99 Drugi kmetijski stroji in Other agricultural machines
oprema and equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 703
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 65.060.99 Supersedes EN 703:2004+A1:2009
English Version
Agricultural machinery - Safety - Silage loading, mixing
and/or chopping and distributing machines
Matériel agricole - Sécurité - Désileuses chargeuses, Landmaschinen - Sicherheit - Maschinen zum Laden,
mélangeuses et/ou hacheuses et distributrices Mischen und/oder Zerkleinern und Verteilen von
Silage
This European Standard was approved by CEN on 12 March 2021.

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 703:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Safety requirements and/or protective/risk reduction measures . 9
4.1 General . 9
4.1.1 Principles . 9
4.1.2 Principles of safety integration . 9
4.1.3 Control systems . 10
4.1.4 Guards and protective devices . 10
4.1.5 Electricity supply, batteries. 10
4.1.6 Extreme temperatures . 10
4.1.7 Fire and explosion . 10
4.1.8 Vibrations . 10
4.1.9 Maintenance . 10
4.1.10 Work positions and operator's station . 10
4.1.11 Uncontrolled movements . 11
4.1.12 Roll-over and tip-over . 11
4.1.13 Means of access . 11
4.1.14 Falling or ejected objects or fluids . 11
4.2 Location of the manual controls . 11
4.2.1 General . 11
4.2.2 Requirements for hold-to-run controls . 11
4.2.3 Additional requirements for manual controls . 12
4.3 Visibility. 12
4.3.1 For work area of the cutting, loading tools and loading door located at front of the
machine . 12
4.3.2 For work area of the cutting, loading tools and loading door located at rear of the
machine . 13
4.4 Loading device . 16
4.4.1 Stopping time of powered cutting and loading tools. 16
4.4.2 Loading door . 16
4.5 Cutting and loading tools . 16
4.5.1 General . 16
4.5.2 Maintenance of cutting tools . 17
4.5.3 Blockages . 17
4.5.4 Protection against inadvertent re-engagement in case of mechanical elements
stopped by blockage . 18
4.6 Mixing and/or chopping device . 18
4.6.1 Protection against contact with moving parts . 18
4.6.2 Checking of the mixing . 19
4.6.3 Top edges of the chamber of the machine . 19
4.6.4 Manual addition of feedstuffs . 20
4.6.5 Maintenance of mixing and/or chopping tools . 20
4.7 Distribution device . 20
4.7.1 General . 20
4.7.2 Case where a conveyor is used . 21
4.7.3 Case where an auger is used . 26
4.7.4 Case where a distributor cylinder is used . 27
4.7.5 Case of free discharge. 29
4.7.6 Case of turbines . 29
4.8 Weighing device display . 32
4.9 Noise . 33
4.9.1 Noise reduction as a safety requirement . 33
4.9.2 Verification of requirements on noise . 34
4.10 Jacking points . 34
4.11 Brakes . 34
4.12 Stability and immobilisation . 34
4.12.1 Stability and immobilisation of the detached machine . 34
4.12.2 Minimum load on the drawbar hitch . 35
4.13 Remote control . 35
4.14 Electro-magnetic compatibility (EMC) . 35
5 Verification of the safety requirements and/or protective/risk reduction measures . 35
5.1 Measurement of the tools' stopping time . 35
6 Information for use . 36
6.1 Instruction handbook . 36
6.2 Marking . 38
6.3 Safety signs . 39
Annex A (informative) Examples of machines and components . 40
Annex B (informative) List of significant hazards . 49
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 53
Bibliography . 57

European foreword
This document (EN 703:2021) 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 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 January 2022, and conflicting national standards shall
be withdrawn at the latest by January 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 703:2004+A1:2009.
This document 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
document.
EN 703:2004+A1:2009 has been technically revised. The following significant changes were introduced:
— update the normative references;
— clarification of the scope (excludes silage buckets);
— improvement of the safety requirements in particular regarding controls, visibility, protection
against cutting tools, blockages, loading door, inspection of mixing, access (addition of feedstuffs),
conveyors, access to turbines;
— addition of new clauses on: jacking points, brakes, stability and immobilisation, remote control,
electro-magnetic compatibility (EMC), completion of instructions, safety signs;
— addition of new subclauses under 4.1 to refer to the relevant clauses of
EN ISO 4254-1:2015 that apply without change or exclusion.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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.
Introduction
This document is a type-C standard as specified in EN ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and hazardous events
are covered are indicated in the scope of this document. These hazards are specific to silage loading,
mixing and/or chopping and distributing machines.
Significant hazards that are common to all of the agricultural machines (self-propelled, mounted, semi-
mounted and trailed) are dealt with in EN ISO 4254-1.
When provisions of this type-C standard are different from those which are stated in type A or B
standards, the provisions of this type-C standard 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.
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.
1 Scope
This document, used together with EN ISO 4254-1:2015, specifies the safety requirements and their
verification for the design and construction of mounted, semi-mounted, trailed or self-propelled
machines that have a combination of two or more of the following functions: loading, mixing, chopping
and distributing silage and/or other feedstuffs or materials used for animal bedding such as straw, to be
used by one operator only. It includes those fitted with a built-in loading crane. In addition, it specifies
the type of information on safe working practices (including residual risks) to be provided by the
manufacturer.
This document applies only to machines that have the following functional combinations:
— mixing and distributing functions;
— mixing, chopping and distributing functions;
— loading, mixing and distributing functions;
— loading, mixing, chopping and distributing functions;
— chopping and distributing functions; or
— loading, chopping and distributing functions.
Silage block cutters, even if they carry out a single function, are covered by this document.
This document does not apply to:
— machines which pick up green fodder directly from the field;
— loading cranes;
— silage buckets;
— round or rectangular unbalers.
NOTE 1 Loading cranes are dealt with in EN 12999:2020.
NOTE 2 Autonomous silage loading, mixing and/or chopping and distributing machines (robotic feed systems)
will be dealt with in a separate standard (EN ISO 3991, under preparation).
This document deals with the significant hazards, hazardous situations and events relevant to machines
for loading, mixing and/or chopping and distributing silage and/or other feedstuffs, when they are used
as intended and under the conditions foreseen by the manufacturer as listed in Clause 4, except for the
hazards arising from:
— failure of the control circuit;
— inadequate seating;
— inadequate lighting;
— travelling of machinery;
— break-up of parts rotating at high speed;
— cutting hazard during service on sharp parts (e.g. blades of the mixing and/or chopping device).
It is not applicable to environmental hazards (except noise).
It does not deal with stability when travelling.
This document is not applicable to machines for loading, mixing and/or chopping and distributing
silage and/or other feedstuffs which are manufactured before the date of publication of this document
by CEN.
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.
EN 15811:2014, Agricultural machinery - Fixed guards and interlocked guards with or without guard
locking for moving transmission parts (ISO/TS 28923:2012 modified)
EN ISO 13851:2019, Safety of machinery - Two-hand control devices - Principles for design and selection
(ISO 13851:2019)
1)
EN ISO 4254-1:2015, Agricultural machinery - Safety - Part 1: General requirements (ISO 4254-1:2013)
EN ISO 11688-1:2009, Acoustics - Recommended practice for the design of low-noise machinery and
equipment - Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk
reduction (ISO 12100:2010)
EN ISO 13855:2010, Safety of machinery - Positioning of safeguards with respect to the approach speeds
of parts of the human body (ISO 13855:2010)
EN ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by
upper and lower limbs (ISO 13857:2019)
ISO 3767-1:2016, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment
— Symbols for operator controls and other displays — Part 1: Common symbols
ISO 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment
— Safety signs and hazard pictorials — General principles
ISO 15817:2012, Earth-moving machinery — Safety requirements for remote operator control systems

1)
An amendment is under preparation.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
Note 1 to entry: Examples of machines and components, illustrating the following definitions are given in
Annex A.
3.1 Machines
3.1.1
silage block cutter
machine mounted on the rear 3-point linkage of a tractor that consists of a main guiding frame,
equipped with a set of horizontal tines, carrying the cutting frame equipped with one or more cutting
knives, intended to cut out a silage block, to take it from the silo and to discharge or distribute it
Note 1 to entry: This machine can be equipped with a distribution device.
3.1.2
silage bucket
bucket intended to be fitted as an attachment on a front loader or a self-propelled variable reach truck
and which carries out at least loading and distributing functions
3.1.3
round or rectangular unbaler
machine for unbaling of round or rectangular bales and distribution at ground level
Note 1 to entry: Illustration is given in Figure A.12.
3.2 Functions
3.2.1
mixing
operation for blending two or more different materials without reducing the size of their components
3.2.2
chopping
operation to reduce the size of the constituent elements of a material or to break up an agglomerated or
an entangled material
3.3 Loading device
3.3.1
cutting and loading tools
set of elements, consisting of the loading arm and of tools for taking the materials such as rotary cutters,
knives, blades, teeth, etc., needed for picking-up (i.e. cutting) the material and for loading the machine
3.3.2
loading crane
powered crane comprising a column, which slews about a base, and a boom system which is attached
onto the top of the column, and which is fitted on the machine and is designed for loading product into
the machine by means of a grab, a hook or any other device
[SOURCE: EN 12999:2011, definition 3.1.1 modified]
3.3.3
loading door
mobile part fitted generally at the rear of the machine, which is used for handling and/or for containing
the material and/or loading the products inside the machine, and which is used as a door for closing the
mixing and/or chopping chamber
3.4
mixing and/or chopping device
set of elements such as one or more rotating auger(s), rotating paddle auger, moving floor, conveyor,
separator, turbine
3.5
distribution device
set of elements (such as conveyor belt, auger, distributor cylinder, turbine) operated to unload the
materials from the machine and to deposit them where required (on the ground, in troughs, on feeding
belts, etc.)
3.6
work station
position of the operator, standing on the ground or on a platform or sitting, to actuate controls or carry
out any other task
3.7
driver's station
position of the operator from where the driving of the machine is controlled
4 Safety requirements and/or protective/risk reduction measures
4.1 General
4.1.1 Principles
Machinery shall comply with the safety requirements and/or protective/risk reduction measures of this
clause. In addition, the machine shall be designed according to the principles of relevant clauses of
EN ISO 12100:2010 for hazards relevant but not significant, which are not dealt with by this document
(e.g. burns).
4.1.2 Principles of safety integration
2)
EN ISO 4254-1:2015, 4.1, 4.2, and Annex E apply.

2)
Amendment A1 to EN ISO 4254-1:2015 is under preparation. It will include a new Annex E, Guidance for risk assessment
and determination of performance levels for safety-related parts of control systems.
4.1.3 Control systems
EN ISO 4254-1:2015, 4.5, 4.6, 4.19, 4.20, 5.1.3, 5.1.8 and 6.1 apply.
For safety and reliability of control systems, EN ISO 4254-1:2015, 4.5, 4.6, 4.12, 4.13, 4.14, 4.18, 4.19
and 4.20 apply.
4.1.4 Guards and protective devices
4.1.4.1 General
EN ISO 4254-1:2015, 4.2, 4.10 apply.
EN ISO 13857:2019, Table 1, Table 3, Table 4 and Table 6 as appropriate.
4.1.4.2 Moving transmission parts
Fixed guards to be opened or removed by the use of a tool and interlocking guards with or without
guard locking for moving parts of the power transmission on shall comply with EN 15811:2014.
Unless otherwise specified in 4.4 to 4.7 of this document, moving parts involved in the process
EN ISO 4254-1:2015, 4.2 and 4.10 apply.
4.1.4.3 Transmission of power between self-propelled machinery (or tractor) and recipient
machinery
EN ISO 4254-1:2015, 6.4 applies.
4.1.4.4 Starting and stopping the engine
EN ISO 4254-1:2015, 5.1.8 applies.
4.1.5 Electricity supply, batteries
EN ISO 4254-1:2015, 4.12 and 5.3 apply.
For isolation of energy sources, see EN ISO 4254-1:2015, 5.3.2 and 6.4.
4.1.6 Extreme temperatures
EN ISO 4254-1:2015, 5.5 applies.
4.1.7 Fire and explosion
EN ISO 4254-1:2015, 4.1, 5.1.6 and 5.4 apply.
4.1.8 Vibrations
EN ISO 4254-1:2015, 4.4 applies.
4.1.9 Maintenance
Unless otherwise specified in 4.5.2 and 4.6.5 of this document, EN ISO 4254-1:2015, 4.8, 4.11, 4.15 and
4.17 apply.
See also Clause 6.1 regarding instructions for maintenance.
4.1.10 Work positions and operator's station
Operator stations shall comply with EN ISO 4254-1:2015, 4.7 and 5.1.
Other than operator stations shall comply with EN ISO 4254-1:2015, 4.8.
When provided, seats shall comply with EN ISO 4254-1:2015, 5.1.2.
4.1.11 Uncontrolled movements
EN ISO 4254-1:2015, 4.9 and 4.5.2 apply.
4.1.12 Roll-over and tip-over
EN ISO 4254-1:2015, 5.7 apply.
4.1.13 Means of access
EN ISO 4254-1:2015, 4.7, 4.8 and 5.1 apply.
4.1.14 Falling or ejected objects or fluids
EN ISO 4254-1:2015, 4.13 applies.
4.2 Location of the manual controls
4.2.1 General
In addition to EN ISO 4254-1:2015, 4.5, the following requirements apply.
It shall not be possible for the operator, when inside the mixing and/or chopping chamber(s), to reach
the manual controls.
The manual controls shall be located such that it is not possible for the operator to reach unguarded
mobile working tools while actuating the control. This requirement is considered met for mounted
machines when the distance between the manual controls and any unguarded mobile working tools in
operation is more than 850 mm.
In the case of two-hand controls, they shall comply with EN ISO 13851:2019 and be positioned such
that it is not possible to reach unguarded mobile working tools during the run-down time, in
compliance with EN ISO 13855:2010.
For mounted, semi-mounted or trailed machines, when controls require actuation from the driver's
station, these controls shall be designed so that the operator can reach them, for example by means of
an adjustable position of the controls or controls that can be situated inside the tractor (including
tractor in built controls).
Verification: shall be by measurement and inspection.
Where there is more than one control position, the control system shall be designed in such a way that
the use of one of them precludes the use of the others, except for stop controls and emergency stops.
Stop controls shall have priority over the start controls.
Mixing and/or chopping and distribution functions shall be controlled from the driver's station only or
these functions shall be activated by a two-hand control on the machine.
4.2.2 Requirements for hold-to-run controls
The control for the activation and the lowering of the cutting and loading tools and of the loading door
shall be of the hold-to-run type.
4.2.3 Additional requirements for manual controls
The manual controls of powered cutting and loading tools (rotary and oscillating cutter or knives) as
well as of the loading door shall be designed or guarded so that the tools and the loading door cannot
move without intentional action (e.g. a manual control requiring two different actions to be operational,
remote control box with protection rail around the manual controls).
Verification: shall be by inspection and functional test.
The location of the manual control(s) of cutting and loading tools or loading door shall be such that
when the operator actuates these from the work station or the driver’s station, there is visibility on the
work area of cutting and loading tools or the loading door in accordance with 4.3.
Verification: shall be by inspection, measurement and function test in accordance with 4.3.
When the machine is travelling, it shall be possible to actuate controls for mixing and/or chopping and
distribution only from the driver’s station.
Verification: shall be by function test.
4.3 Visibility
4.3.1 For work area of the cutting, loading tools and loading door located at front of the machine
The visibility is considered to be adequate when the operator, from his driver’s and work station, can
see the work area of the cutting, loading tools and the loading door over their whole width, including
any lateral entrapment zones. This work area extends from the highest working position to a height of
1 m or less from the ground when the machine is in its loading position and:
— for self-propelled machines, at 200 mm measured from the edge of the cutting and loading tools
(see Figure 1).
When direct visibility is not achieved from the driver's station, machines with cutting and loading tools
at the front of the machine shall be fitted with devices such as mirrors or closed circuit television
(CCTV) which ensure indirect visibility.
Verification: shall be by measurement.
Verification is achieved with the tools in the raised position. The position of the operator’s eye is
determined as shown in Figure 1. A lateral displacement of the eye of the operator is allowed
within ± 300 mm from the medium position.
Dimensions in millimetres
Key
1 eye position
2 cutting and loading tools
Figure 1 — Checking of the direct visibility for self-propelled machines
4.3.2 For work area of the cutting, loading tools and loading door located at rear of the machine
The visibility is considered to be adequate when the operator, from his driver’s station, can see the
work area of the cutting, loading tools and the loading door over their whole width, including any
lateral entrapment zones (see d2 and d4 of Figure 2b and 2d). This work area extends from their
highest position to a minimum height of 1,5 m from the ground when the machine is in its loading
position and at 200 mm:
— measured from the edge of the cutting and loading tools for self-propelled machines;
— measured from the outer edge of the machine for trailed machines (see Figures 2a 2b 2c 2d).
When direct visibility is not achieved from the driver's station, a sound and/or light signal shall be
emitted at actuation of the cutting and loading tools or the loading door. Verification: shall be by
functional test.
When direct visibility is not achieved machines shall be equipped with devices to detect persons or
shall be designed to allow indirect visibility at rearwards and ≥ 200 mm sideways (d4 in Figures 2b and
2d), on each side of the body, except for the areas hidden by the sides of the machine, as described in
Figures 2a 2b 2c 2d, for example through the 2 mirrors of the tractor or driver's cab.
When the machine is equipped with a work station, the work station shall allow compliance with
requirement of direct visibility.
Verification: shall be by measurement on an empty machine in loading position, with the cutting,
loading tools in the raised position or the loading door slightly opened, as described in Figures 2a 2b 2c
2d.
The position of the operator’s eye is determined as shown in Figure 3. A lateral displacement of the eye
of the operator is allowed within ± 300 mm from the medium position.
Dimensions in millimetres
a) Checking of the visibility for trailed machines with loading door
Dimensions in millimetres
b) Checking of the visibility for trailed machines with loading door
Dimensions in millimetres
c) Checking of the visibility for trailed machines with cutting, loading tools
Dimensions in millimetres
d) Checking of the visibility for trailed machines with cutting, loading tools
Key
h highest position to a minimum height of 1,5 m from the ground of the work area of the cutting, loading tools
and the loading door
d1 width of the loading tools
d2 width of the visibility area - interior width of the machine
d3 excluded width of the visibility area (sides of the machine)
d4 width of the visibility area on sideways = 200 mm
Figure 2 — Checking of the visibility for trailed machines
Dimensions in millimetres
Key
1 eye position
2 clevis or hook
3 lower hitch point
4 ground
NOTE The hitch point is either 2 or 3.
Figure 3 — Determination of the eye position from the driver’s station on the tractor
4.4 Loading device
4.4.1 Stopping time of powered cutting and loading tools
The stopping time of powered cutting and loading tools shall be 5 s maximum for self-propelled
machines and 10 s maximum for other machines.
Verification: shall be by measurement, according to 5.1.
4.4.2 Loading door
To ensure the protection of the operator against crushing and shearing hazards related to a failure of
the hydraulic circuit, the machine shall be fitted with a device which limits the maximum downward
speed of the door should failure occur to 40 mm/s measured tangential to the trajectory of the outer
edge of the door.
In order to avoid unexpected opening of the loading door when travelling, mechanical or hydraulic
locking devices complying with EN ISO 4254-1:2015, 4.11 shall be provided.
In order to avoid the hazard of inadvertent lowering of the loading door during maintenance, a device in
accordance with EN ISO 4254-1:2015, 4.11 shall be present on the machine. If the device is a
mechanical support, this shall not be detachable from the machine.
For semi-mounted and trailed machines with a loading door rotating about its lower edge, the vertical
downwards load at the hitch point shall be positive, measured stationary on a horizontal firm surface
with the loading door (see Figure A.9) in its most unfavourable condition for travelling and distribution,
as specified by the manufacturer in the instruction handbook.
Verification: shall be by measurement and functional test.
4.5 Cutting and loading tools
4.5.1 General
All the tools (e.g. blades, cutting components, sharp edges, etc.) which can be hazardous when not in use
shall be guarded in the travelling and distribution positions.
This guarding shall give protection against contact with cutting and loading tools at the sides and
working area at the front over the complete tool path.
In the case of rotating tools, the front guard shall be self-closing and shall extend on the working front at
least 110° from the vertical to the cutting and loading tools axis (see Figure 4), with the machine in
travelling position. When the cutting and loading tools are mounted at the front of the machine, the
guard, if not self-closing type, shall be activated from the driver’s station.
Key
1 front guard
Figure 4 — Protection of rotating tools when not in use
The protection against inadvertent lowering of the cutting and loading tools during repair and
maintenance shall be provided either by a mechanical support or by hydraulic locking devices which
shall comply with the requirements of EN ISO 4254-1:2015, 4.11.
The movable parts located inside the chopping chamber in the travel and distribution position satisfy
this requirement.
Verification: shall be by measurement and functional test.
4.5.2 Maintenance of cutting tools
Cutting tools shall be designed to be moved to the maintenance position(s) either manually or with a
specific tool.
Cutting tools shall be lockable in the maintenance position(s) either manually or with a self-locking
device.
4.5.3 Blockages
The machines shall be designed and built to minimize the probability and frequency of blockages and to
prevent a hazard arising should clearance become necessary.
This general requirement shall be achieved by the following risk reduction measures:
a) as far as practicable, avoid the need to approach the danger zone by providing means to allow
clearing of blockages without interrupting the power to the machine, either from the driver station
or, if the normal operation is controlled from workstation, from the workstation. Such means are
e.g.:
— device to enlarge the section of passage of the material;
— reverse direction of the chopping tools, independently from the cutting tools;
b) if a) is not fully achievable, assist in the clearing of blockages and cleaning after the machine is
stopped, by means of, e.g.:
— freewheel of the cutting tool axle to allow manual rotation without external power;
— hand tools to remove blockages (see 6.1 k)).
Verification: shall be by inspection and functional test.
4.5.4 Protection against inadvertent re-engagement in case of mechanical elements stopped by
blockage
Automatic restarting of hazardous movement following clearance of a blockage by an operator in the
hazard zone shall be prevented. A restart shall require the intentional actuation of a control outside the
hazard zone (e.g. torque limiter reset which require a complete stop of the PTO to be re-engaged).
4.6 Mixing and/or chopping device
4.6.1 Protection against contact with moving parts
4.6.1.1 General
Unless otherwise stated in 4.6, safety distances for protection against contact with moving parts shall
comply with the safety distances of EN ISO 13857:2019, Tables 1, 3, 4 and 6 when cutting and loading
tools are in the position for mixing and/or chopping and/or the loading door is closed.
Verification: shall be by measurement.
When cutting tool guards, loading tools, or the loading door, are in open position (e.g. loading door
open), requirements of 4.6.1.2 apply.
4.6.1.2 Machine with cutting and loading tools or with loading door
4.6.1.2.1 Measures shall be taken to protect the operator against contact, entanglement and drawing-
in hazards generated by the moving mixing and/or chopping device when cutting and loading tools or
loading door are in the loading position (e.g. loading door open).
4.6.1.2.2 The following protective measures shall be provided in the conditions defined in 4.6.1.2.1:
— it shall not be possible to operate the mixing and/or chopping device; or
— the mixing and/or chopping device shall only be operable by a hold-to-run control; or
— during the raising and lowering of the cutting and loading means, compliance with the safety
distances in EN ISO 13857:2019, Tables 1, 3, 4 and 6 shall be met by a protective device
automatically introduced when access is possible (e.g. moveable interlocked wall).
NOTE Requirements for cutting tools, loading tools and loading doors are given separately in 4.5.
A trailed or mounted machine with a loading door that rises to close (the type of machine illustrated in
Figure A.9) shall:
— allow the operator to remove the net wrap or strings from a bale after it has been loaded, without
entering the bale chamber. It shall be possible to carry out this procedure by standing on the
ground without the need to climb on the machine and without the need to activate the chopping
device; and
— movement of the moving floor (if any) shall be controlled by a two-hand control in accordance with
EN ISO 13851:2019 or controlled from the driver’s station.
Corresponding instructions for safe use shall be given in the operator's manual [see 6.1 dd)].
Verification: shall be by measurement, inspection, and functional test.
4.6.2 Checking of the mixing
Where the upper edge of the mixing and/or chopping chamber at its lowest point is at more than 1,60 m
above the ground, one or a combination of the following means shall be provided to allow safe
monitoring of the mixing process:
a) an opening to enable the operator to check the mixing process. For this opening. the safety
distances in EN ISO 13857:2019, Tables 1, 3, 4 and 6 shall be complied with to prevent contact with
moving mechanical parts inside the mixing and/or chopping chamber;
b) observation means to allow direct visibility from the driving position (e.g. observation window or
grid). In case this means is an opening or grid, it shall comply with complying with
EN ISO 13857:2019, Tables 1, 3, 4 and 6;
c) standing platform of a work statio
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