oSIST prEN ISO 4254-19:2023

SLOVENSKI STANDARD
oSIST prEN ISO 4254-19:2022
01-junij-2022
Kmetijski stroji - Varnost - 19. del: Stroji za mešanje krme (ISO/DIS 4254-19:2022)
Agricultural machinery - Safety - Part 19: Feed mixing machines (ISO/DIS 4254-19:2022)
Landmaschinen - Sicherheit - Teil 19: Futtermischwagen (ISO/DIS 4254-19:2022)
Matériel agricole - Sécurité - Partie 19: Machines de mélange des aliments (ISO/DIS
4254-19:2022)
Ta slovenski standard je istoveten z: prEN ISO 4254-19
ICS:
65.060.99 Drugi kmetijski stroji in Other agricultural machines
oprema and equipment
oSIST prEN ISO 4254-19:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 4254-19:2022

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oSIST prEN ISO 4254-19:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4254-19
ISO/TC 23/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-04-13 2022-07-06
Agricultural machinery — Safety —
Part 19:
Feed mixing machines
ICS: 65.060.99
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
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 4254-19:2022(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 2022

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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Machines . 2
3.2 Functions . 2
4 Safety requirements and/or protective risk reduction measures .4
4.1 General . 4
4.2 Machine controls . 4
4.2.1 Controls located on the workstation or in the operator’s station . 4
4.2.2 Remote controls . 4
4.2.3 Emergency stop . 4
4.3 Visibility . 5
4.3.1 Visibility of work areas of cutting, loading and cutting/loading devices . 5
4.4 Loading devices . 8
4.4.1 General . 8
4.4.2 Loading door . 9
4.5 Cutting devices . 9
4.5.1 General . 9
4.5.2 Stopping time. 10
4.5.3 Maintenance and repair . 10
4.5.4 Blockages. 11
4.6 Mixing/chopping device . 11
4.6.1 Guarding for a machine equipped with cutting, loading, or cutting/loading
tools . . 11
4.6.2 Guarding for a machine equipped with distribution device .12
4.7 Mixing/chopping chamber .13
4.7.1 Viewing inside chamber.13
4.7.2 Reducing material build-up . 13
4.7.3 Manual addition of material . 14
4.7.4 Maintenance and repair . 14
4.8 Moving floor . 14
4.9 Distribution device . 14
4.9.1 General . 14
4.9.2 Conveyors . 15
4.9.3 Augers . 15
4.9.4 Distributor cylinders . 15
4.9.5 Impellers . 16
4.10 Scale display. 24
4.11 Noise . 25
4.11.1 Noise reduction as a safety requirement . 25
4.11.2 Verification of requirements on noise . 26
4.12 Stability and immobilization . 26
4.12.1 General . 26
4.12.2 Supporting devices .26
4.13 Remote control . 27
4.14 Electro-magnetic compatibility (EMC) . 27
5 Verification of the safety requirements and/or protective risk reduction measures .27
6 Information for use .28
6.1 Operator's manual .28
6.1.1 General .28
6.1.2 Preparing the machine.28
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
6.1.3 Operating the machine .28
6.1.4 Servicing and maintaining the machine . .29
6.1.5 Noise .29
6.2 Marking .29
6.2.1 General .29
6.2.2 Safety signs . 30
Annex A (informative) List of significant hazards .31
Annex B (informative) Examples of machines and components .34
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 44
Bibliography .47
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for
agriculture and forestry, Subcommittee SC 3, Safety and comfort.
A list of all parts in the ISO 4254 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.
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oSIST prEN ISO 4254-19:2022

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oSIST prEN ISO 4254-19:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 4254-19:2022(E)
Agricultural machinery — Safety —
Part 19:
Feed mixing machines
1 Scope
This document, used together with ISO 4254-1, specifies the safety requirements and their verification
for the design and construction of silage block cutters and feed mixing machines (for example
feed mixers, bale processors). Feed mixing machines can be stationary, mounted, semi-mounted,
interchangeable towed or self-propelled machines that have a combination of two or more of the
following functions: loading, mixing, chopping and distributing materials used for animal feed or
bedding. In addition, it specifies the type of information on safe working practices to be provided by the
manufacturer.
This document does not apply to:
— machines which pick up green fodder directly from the field;
— loading cranes not attached to a feed mixing machine;
— Autonomous feed mixing machines (including robotic feed systems dealt with in 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 Annex A, 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 manufactured before the date of publication of this
document.
Examples of machines and components covered by this document are shown in Annex B.
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.
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
ISO 3600:2015, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Operator's manuals — Content and format
ISO 4254-1:2013, Agricultural machinery — Safety — Part 1: General requirements
ISO/TR 11688-1:1995, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13851:2019, Safety of machinery — Two-hand control devices — Principles for design and selection
ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds of
parts of the human body
ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by upper
and lower limbs
ISO 15817:2012, Earth-moving machinery — Safety requirements for remote operator control systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions given in ISO 12100:2010 and the
following 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 https:// www .electropedia .org/
3.1 Machines
3.1.1
feed mixer
machine with an open-top chamber and powered mixing/chopping device(s) for blending of feed stocks
and supplements, and a means for dispensing the blended material
Note 1 to entry: The mixing/chopping devices can consist of, but are not limited to, rotating augers, rotors (for
example paddles, ribbons, bars, knives), or a combination of augers and rotors.
Note 2 to entry: The mixer can be self-propelled, truck-mounted, trailer-mounted, or a stationary configuration.
3.1.2
bale processor
device with an open-top chamber and powered chopping elements intended to chop baled materials
and distribute the processed material
3.1.3
silage block cutter
device with cutting edge(s) that is used to cut a block of material from the remaining material and
transport the material for processing or distribution while maintaining the material density and form
3.2 Functions
3.2.1
mixing
operation to blend two or more different materials to create a mixture
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
3.2.2
chopping
operation to break up or reduce the size of the constituent elements of a mass of material
3.2.3
cutting
operation to sever a portion of material from the remaining material loading device
3.3
loading device
element or set of elements attached to the machine that moves material into the chamber
3.3.1
loading crane
powered crane, attached to the machine, comprising a column, which pivots about a base, and a boom
system which is attached to the top of the column for loading material into the chamber
[SOURCE: EN 12999:2011, definition 3.1.1 modified]
3.3.2
loading door
moveable portion of the chamber that opens to serve a loading function of the machine and closes
during mixing or processing of material
3.3.3
loading conveyor
powered mechanism that continually moves material into the chamber
3.3.4
loading bucket
moveable chamber, attached to the machine that lifts material and dumps it into the chamber
3.4
cutting/loading device
element or set of elements attached to the machine, that alone or in combination, serve the functions of
a cutting device and a loading device.
3.5
mixing/chopping device
element or set of elements that blends or size reduces the material after being loaded into the chamber
3.6
cutting device
element or set of elements attached to the machine that performs the cutting function
3.7
distribution device
powered element or set of elements, attached to the machine, which moves the material from the
chamber to a desired location (for example conveyor, belt, auger, distributor cylinder, impeller, blower)
3.8
unloading door
moveable portion of the chamber that opens to unload material
3.9
moving floor
powered conveyor for moving the material within the chamber or on the loading door
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
3.10
workstation
position on the machine, other than the operator's station, from which control of at least some machine
functions is possible
3.11
operator's station
position of the operator during machine operations including transport
4 Safety requirements and/or protective risk reduction measures
4.1 General
4.1.1 Machinery shall comply with the safety requirements or protective risk reduction measures of
this clause. In addition, the machine shall be designed according to the principles of relevant parts of
ISO 12100 for hazards relevant but not significant, which are not dealt with by this document.
4.1.2 Unless otherwise specified in this document, the machines shall comply with the requirements
of ISO 4254-1 and with ISO 13857:2019, Table 1, Table 3, Table 4 and Table 6 as appropriate.
4.2 Machine controls
4.2.1 Controls located on the workstation or in the operator’s station
4.2.1.1 Controls shall be designed so that the operator can reach them where intended, for example
by means of an adjustable position.
4.2.1.2 It shall not be possible for the operator to reach unguarded moving working elements while
actuating the control.
4.2.1.3 It shall not be possible to reach the controls from inside the mixing/chopping chamber(s).
4.2.1.4 Stop controls shall have priority over all other controls.
4.2.1.5 Workstation controls shall be hold-to-run.
4.2.1.6 It shall be possible to deactivate workstation functions to limit control to the operator’s
station only.
4.2.1.7 Two-hand controls shall comply with ISO 13851.
4.2.2 Remote controls
Remote operator-controlled machinery shall comply with the requirements as specified in ISO 15817.
4.2.3 Emergency stop
An emergency stop control according to ISO 4254-1:2013, 4.19 shall be installed on self-propelled
machines
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
4.3 Visibility
4.3.1 Visibility of work areas of cutting, loading and cutting/loading devices
4.3.1.1 For work area at front of the machine
The operator shall have visibility of the work area at the front of the machine from the operator’s station
and/or the workstation.
The width of the work area is the entire width of any cutting, loading, and cutting/loading devices,
including any entrapment zones.
The height of the work area extends from the highest working position of any cutting, loading, and
cutting/loading devices to a height of 1 m or less from the ground when the machine is in its loading
position
The location of the work area is 200 mm measured from the edge of any cutting, loading, and cutting/
loading devices (see Figure 1). If direct visibility cannot be achieved, devices such as mirrors or closed-
circuit television (CCTV) shall be used to ensure indirect visibility.
Dimensions in millimetres
Key
1 eye position
2 cutting/loading device
3 visibility zone
Figure 1 — Checking of the direct visibility of a self-propelled machine
4.3.1.2 For work area at rear of the machine
The operator shall have visibility of the work area at the rear of the machine from the operator’s station
and/or the workstation.
The width of the work area is the entire width of any cutting, loading, and cutting/loading devices,
including any entrapment zones [see d2 of Figure 2b and 2d].
The height of the work area extends from the highest working position of any cutting, loading, and
cutting/loading devices to a height of 1,5 m or less from the ground when the machine is in its loading
position
NOTE The height of 1,5 m is under further investigation and may be replaced by 1,0 m
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
The location of the work area is 200 mm to the rear of
— the edge of any cutting, loading, and cutting/loading devices; or
— the machine when the loading door is closed.
If direct visibility of the work area cannot be achieved, at least one of the following shall be achieved:
— indirect visibility through the use of devices such as mirrors or closed-circuit television (CCTV)
and a sound and/or light signal emitted during actuation of cutting, loading, and cutting/loading
devices; or
— a device(s) to detect persons in the hazard zone and inform the operator.
4.3.1.3 For work areas at sides of machine
The operator shall have visibility of the work area at the side of the machine from the operator’s station
and/or the workstation.
The width of the work area is 200 mm measured from the sides of any cutting, loading, and cutting/
loading devices of the machine [see d4 in Figures 2b and 2d)].
The height of the work area extends from the highest working position of any cutting, loading, and
cutting/loading devices to a height of 1.5 m or less from the ground when the machine is in its loading
position
The location of the work area is 200 mm to the rear of:
— indirect visibility through the use of devices such as mirrors or closed-circuit television (CCTV)
and a sound and/or light signal emitted during actuation of cutting, loading, and cutting/loading
devices
— a device(s) to detect persons in the hazard zone and inform the operator
4.3.1.4 Operator’s eye position
The position of the operator’s eye is determined as shown in Figure 1 and Figure 3. A lateral displacement
of the eye of the operator is allowed within ± 300 mm from the centre position.
a) Checking of the visibility for trailed machines with loading door - side view
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oSIST prEN ISO 4254-19:2022
ISO/DIS 4254-19:2022(E)
b) Checking of the visibility for trailed machines with loading door – top view
c) Checking of the visibility for trailed machines with cutting/loading tools – side view
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 excl
...