oSIST prEN ISO 4254-6:2026

SLOVENSKI STANDARD
01-junij-2026
Kmetijski stroji - Varnost - 6. del: Škropilnice in naprave za razdeljevanje tekočih
gnojil (ISO/DIS 4254-6:2026)
Agricultural machinery - Safety - Part 6: Sprayers and liquid fertilizer distributors
(ISO/DIS 4254-6:2026)
Landmaschinen - Sicherheit - Teil 6: Pflanzenschutzgeräte (ISO/DIS 4254-6:2026)
Matériel agricole - Sécurité - Partie 6: Pulvérisateurs et distributeurs d'engrais liquides
(ISO/DIS 4254-6:2026)
Ta slovenski standard je istoveten z: prEN ISO 4254-6
ICS:
65.060.25 Oprema za skladiščenje, Equipment for storage,
pripravo in razdeljevanje preparation and distribution
gnojiv of fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 4254-6
ISO/TC 23/SC 6
Agricultural machinery — Safety —
Secretariat: AFNOR
Part 6:
Voting begins on:
Sprayers and liquid fertilizer 2026-04-30
distributors
Voting terminates on:
2026-07-23
Matériel agricole — Sécurité —
Partie 6: Pulvérisateurs et distributeurs d'engrais liquides
ICS: 65.060.25
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 4254-6:2026(en)
DRAFT
ISO/DIS 4254-6:2026(en)
International
Standard
ISO/DIS 4254-6
ISO/TC 23/SC 6
Agricultural machinery — Safety —
Secretariat: AFNOR
Part 6:
Voting begins on:
Sprayers and liquid fertilizer
distributors
Voting terminates on:
Matériel agricole — Sécurité —
Partie 6: Pulvérisateurs et distributeurs d'engrais liquides
ICS: 65.060.25
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
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Published in Switzerland Reference number
ISO/DIS 4254-6:2026(en)
ii
ISO/DIS 4254-6:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Safety requirements and/or protective measures . 2
4.1 General .2
4.2 Stability for mounted and trailed .2
4.3 Spray boom deployment from, and return to, the transport position .2
4.4 Adjustment of spray boom height . .4
4.4.1 Manual height adjustment .4
4.4.2 Powered height adjustment .4
4.5 Spray tank .5
4.5.1 Prevention of whole-body access to the tank .5
4.5.2 Limitation of contact with chemicals.5
4.5.3 Prevention of spillage and overflow .6
4.5.4 Protection from contact with spray mixture when draining . .6
4.6 Pressure indicator (manometer) .7
4.7 Protection against overpressure .7
4.8 Fan for air-assistance.7
4.9 Spray liquid carrying hoses .7
4.10 Spraying stop control .8
4.11 Clean water tank .8
4.12 Storage of personal protective equipment .8
4.13 Hitching and clearance zone .8
4.14 Servicing and maintenance .9
4.15 Cleaning of sprayers equipped with recovery panels.10
4.16 Contact between a recovery panel and an obstacle .10
4.17 Noise reduction at the design stage .10
5 Verification of the safety requirements and/or protective measures .10
6 Information for use .10
6.1 Operator's manual .10
6.2 Marking .11
6.2.1 General .11
6.2.2 Sprayers . 12
6.2.3 Product pump. 12
Annex A (informative) List of significant hazards .13
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC aimed to be covered .20
Bibliography .26

iii
ISO/DIS 4254-6:2026(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of
(a) patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 6, Equipment for crop protection, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 144, Tractors and machinery for
agriculture and forestry, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 4254-6:202x), which has been technically
revised and contains the following changes:
— some excluded hazards have been deleted from the scope as they are covered by ISO 4254-1 or this
revised edition;
— the general (stability) requirements have been deleted as they are covered by ISO 4254-1;
— the protection of the operator against hazardous substances in case of front mounted booms has been
removed as this risk is relevant to all types of sprayers but appropriate requirements (in form of an
international reference standard) are not yet available;
— in 4.5.2, the requirements for chemical inductions bowls have been amended to cover foldable devices
— in 4.7, requirements for protecting the operator in case of leakages have been added; — a new
subclause (4.12) to deal with the storage of personal protective equipment has been added;
— a new subclause (4.12) to deal with the storage of personal protective equipment has been added;
— Clause 6 has been aligned with ISO 4254-1.
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.

iv
ISO/DIS 4254-6:2026(en)
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 safety aspect or one type of safeguards that
can be used across a wide range of machinery:
— type-B1 standards on particular safety aspects (for example, safety distances, surface temperature,
noise),
— type-B2 standards on safeguards (for example, two-hand 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 (for example, regulators, accident prevention organizations, market surveillance)
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 (for example, trade unions, organizations for people with special needs);
— service providers, for example, 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 and events are covered
are indicated in the scope of this document. These hazards are specific to sprayers and liquid fertilizer
distributors.
When requirements of this type-C standard are different from those which are stated in type-A or type-B
standards, the requirements of this type-C standard take precedence over the requirements of the other
standards for machines that have been designed and built according to the requirements of this type-C
standard.
Significant hazards that are common to all the agricultural machines (self-propelled, mounted, semi mounted
and trailed) are dealt with in ISO 4254-1.

v
DRAFT International Standard ISO/DIS 4254-6:2026(en)
Agricultural machinery — Safety —
Part 6:
Sprayers and liquid fertilizer distributors
1 Scope
This document, to be used together with ISO 4254-1, specifies the safety requirements and their verification
for the design and construction of mounted, semi-mounted, trailed and self-propelled agricultural sprayers
for use with plant protection products (PPP) and liquid fertilizer application, as placed on the market by the
manufacturer and designed for a single operator only. In addition, it specifies the type of information on safe
working practices (including residual risks) to be provided by the manufacturer.
When requirements of this document are different from those which are stated in ISO 4254-1, the
requirements of this document take precedence over the requirements of ISO 4254-1 for machines that have
been designed and built according to the provisions of this document.
This document, taken together with ISO 4254-1, deals with significant hazards, hazardous situations and
events relevant to sprayers and liquid fertilizer distributors when they are used as intended and under the
conditions foreseeable by the manufacturer (see Annex A), excepting the hazards arising from:
— protection of the driver against spray when spraying (see Foreword);
— automatically actuated height adjustment systems;
— the environment, other than noise;
— moving parts for power transmission except strength requirements for guards and barriers.
This document is not applicable to sprayers and liquid fertilizer distributors which are manufactured before
the date of publication of this document
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 4254-1:2013, Agricultural machinery — Safety — Part 1: General requirements
ISO 5681:2020, Equipment for crop protection — Vocabulary
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and
lower limbs
ISO 16119-2, Agricultural and forestry machinery — Environmental requirements for sprayers — Part 2:
Horizontal boom sprayers
ISO 21278-1:2008, Equipment for crop protection — Induction hoppers — Part 1: Test methods
ISO 21278-2:2008, Equipment for crop protection — Induction hoppers — Part 2: General requirements and
performance limits
ISO/DIS 4254-6:2026(en)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4254-1, ISO 5681, ISO 12100 and
the following apply.
ISO and IEC maintain terminology 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
dry coupler
A liquid hose coupling where the volume in the interface between male and female couplings is such that it
minimizes the liquid left between them when the joint is separated.
4 Safety requirements and/or protective measures
4.1 General
4.1.1 Machinery 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 that are
relevant, but not significant, which are not dealt with by this document.
The compliance with the safety requirements and/or measures shall be verified in accordance with Clause 5.
4.1.2 Unless otherwise specified in this document, the machine shall comply with the requirements of
ISO 4254-1.
4.1.3 The machine shall allow for handling and operating, including filling and maintenance, by an
operator wearing adequate personal protective equipment in accordance with 6.1 g).
4.2 Stability for mounted and trailed
For mounted and trailed machines equipped with a system to quickly empty the tank, clause 6.2.1.1 of
ISO 4254-1:2013 and ISO 4254- 1:2013/Amd1:2021 does not apply.
Mounted and trailed machines equipped with a system to quickly empty the tank shall be designed to be
stable when parked on firm ground, with an inclination up to 8,5° in any direction. This requirement shall be
met with any tanks or hoppers empty, with and without optional fitted equipment or containers for which
the machine has been designed.
Mounted and trailed machines not equipped with a system to quickly empty the tank, clause 6.2.1.1 of
ISO 4254-1:2013 and ISO 4254- 1:2013/Amd1:2021 applies.
Machines equipped with transport rollers for manual handling when dismounted shall be designed to
minimize the risk of tipping over (see Clause 5) or unintended rolling down an incline.
4.3 Spray boom deployment from, and return to, the transport position
4.3.1 No part of the spray boom shall exceed a height of 4 m above the ground during the spray boom
deployment from, and return to, the transport position except as provided in 4.3.1.1 and 4.3.1.2.
4.3.1.1 The spray boom may exceed a height of 4 m within the Operator Controlled Zone (see figure 1)
during the deployment from, and return to, the transport position. The boundaries of the Operator

ISO/DIS 4254-6:2026(en)
Controlled Zone are defined by two planes (BB) parallel to the median longitudinal vertical plane (AA) of the
sprayer which passes through 7 m from the outermost point each side of the sprayer, excluding any:
— mirrors
— direction indicators,
— front, lateral or rear position (side) lamps and parking lamps,
— folding components, for example lift up foot rests, flexible mudflaps, etc., when in the boom is folded in
the transport position.
Key
1 operator controlled zone
2 application zone
Figure 1 — Operator Controlled and Application Zones
4.3.1.2 Where the spray boom exceeds a height of 4m during its deployment from, or return to, the
transport position within the Operator Controlled Zone it shall require:
— an audible or visual warning of the risk that the booms may exceed 4 m;
— visibility of the booms from the operator’s station;
— the machine to be travelling ≤ 4 km/h;
— a safety sign warning of the possibility of contact with overhead power lines shall be provided. See also
6.2.2;
ISO/DIS 4254-6:2026(en)
— the boom design and control logic limits the height to clear boom cradle restraints and is kept as minimum
as possible.
4.3.2 During the deployment from, or return to, the transport position the spray boom shall not exceed
4 m in the Application Zone surrounding the Operator Controlled Zone except as provided in 4.3.2.1 and in
addition to the requirements of 4.3.1.2
4.3.2.1 Where it is necessary to exceed 4 m in the Application Zone (for example, when applying PPP to tall,
late-stage maturity crops such as: maize, forage sorghum, sugar cane, sunflowers, etc.), an acknowledgement
that the booms will exceed 4 m by means of an intentional confirmation via a secondary separate and
distinct action by the operator shall be required.
4.3.3 In the case of powered folding/unfolding operation, manual controls shall be of the hold-to-run type.
Compliance shall be checked by inspection and measurement with the sprayer parked on a level horizontal
surface.
See also 6.1 e) and 6.1 f)
4.4 Adjustment of spray boom height
4.4.1 Manual height adjustment
The manual force necessary to adjust the height of the boom shall not exceed 250 N. The height adjustment
device shall be:
— self-arresting and able to deal with a nominal load equal to at least 1,3 times the weight of the boom and,
— operable from the ground or from a platform as specified in ISO 4254-1:2013, 4.7.2.
4.4.2 Powered height adjustment
In the case of powered height adjustment systems, it shall be possible to assume manual control from the
driver's position and the control shall be of a hold to run type.
The electronic and logic system of the control circuit shall be designed in accordance to ISO 4254-1:2013,
Amd.1:2021.
To ensure the protection of the operator against crushing and shearing hazards related to a hydraulic failure
of the control circuit of the height adjustment of the boom during maintenance work, the machine shall be
configured such that it does not allow lowering of the boom below a minimum height of 180 mm between
the boom and the ground or fitted with either:
a) a device that shall prevent any lowering of the boom beneath 180 mm without an intentional and
separate action of a device in the case where the height needs to be set to less than 180 mm between the
boom and the ground, or
b) a device which limits the maximum downward speed of the boom to 10 mm⋅s−1 (measured at the
centreline of the machine) resulting from of a hydraulic component failure.
All components which are part of the hydraulic circuit (including hydraulic hoses, fittings, etc.) not directly
fitted to the cylinder, the lines connecting the control valve(s) to the cylinder(s) shall be designed to
withstand a pressure of at least four times the rated maximum hydraulic pressure.

ISO/DIS 4254-6:2026(en)
4.5 Spray tank
4.5.1 Prevention of whole-body access to the tank
To limit the risk of access into the tank, any tank opening greater than 400 mm in diameter — or, if it is
rectangular, of more than 400 mm × 300 mm — shall be provided with a grating which can only be removed
by the use of tools. The openings in the grating shall not exceed the above-mentioned dimensions. See also
6.1 g) and h) and 6.2.2.
4.5.2 Limitation of contact with chemicals
4.5.2.1 The sprayer shall be equipped with a means for introducing chemical products that controls or
minimizes the risk of operator exposure and/or inhalation during filling and chemical container cleaning
operations. The sprayer shall be equipped with one or more of the following:
— Chemical induction hopper complying with ISO 21278-1:2008, 21278-2:2008 which are folded/unfolded
manually shall be provided with a handle and locking mechanism for folding/unfolding that can be
actuated without presenting a risk to the operator during operation. The handle can be an integral part
of the chemical induction hopper provided it is suitably designed and clearly identified. Power-assisted
chemical induction hopper shall be able to be operated from a position that prevents the operator
contacting the folding induction hopper while operating the folding control. The folding control shall be
a hold-to-run control. The unintended unfolding of the chemical induction hopper during transport shall
be prevented by a suitable means. An external induction hopper complying with ISO 21278-2:2008 to
be attached via a dry coupling. The chemical container rinsing device shall be operated by a hold-to-run
control. The rinsing device shall operate after a container is correctly positioned on the rinsing device
in a way that prevents the discharge of liquid onto the operator. The rinsed liquid shall be directed to
release into the induction system so that no liquid shall be ejected outside of the induction system.
— Closed transfer systems (CTS) complying with ISO 21191:2021. The CTS shall port their contents directly
into the product tank or fill water stream.
— A dry coupler shall be used to connect with an external water or chemical source. If a dry coupler is not
available, a valve immediately next to the coupler interface shall be used to connect with an external
source.
— A cleaning device for chemical containers installed in the tank filling hole. The cleaning device shall fulfil
the same requirements for operation and cleaning performance as defined in ISO 21278-1:2008, 6.8 and
ISO 21278-2:2008, 4.7.
4.5.2.2 The filling hole of the spray tank shall be so positioned that the height from the ground or platform
is not more than 1 300 mm, with the horizontal reach between the rim of the hole and the outer edge of
any part of the sprayer which could hinder the operator being not more than 300 mm at the operator filling
position (see Figure 1).
The filling hole diameter shall comply with ISO 9357:1990.
The tank lid must be designed to facilitate opening and closing. The force to be applied by the operator to
open or close the lid should not exceed 200 N as the average value when moving from the start position to
the stop position. The peak(s) shall not exceed 400 N.
4.5.2.3 A sprayer equipped with a tank agitation system shall have agitation start and stop controls from
the driving position and from the outside.

ISO/DIS 4254-6:2026(en)
Dimensions in millimetres
Key
1 operator filling position
Figure 2 — Maximum reach for manually filling chemicals
4.5.3 Prevention of spillage and overflow
The actual overall volume of the spray liquid tank shall exceed the nominal volume according to ISO 16119-2.
The lid shall be:
— attached to the machine, for example, by means of a chain;
— fitted with a holding device ensuring a closed position either by means of a positive mechanical action or
lids fixed by screwing;
— fitted so as to prevent leakage of the spray mixture, for example, by means of a seal.
The level of liquid shall be indicated to the operator during filling and emptying. The nominal volume of the
tank shall be marked.
A pressure-compensation device shall be fitted on tanks that are not designed to be put under pressure, in
order to keep them at atmospheric pressure when emptying and filling [see also 6.1 b)].
4.5.4 Protection from contact with spray mixture when draining
The operator shall be prevented from coming into contact with the spray mixture when emptying the tank.
This requirement is met if:
— the draining outlet can be opened without a tool (for example by means of a tap), and
— the flow is directed away from the operator.
An emptying device shall allow the complete emptying of the residue in the tank when the sprayer is in a
horizontal position.
It shall be possible to collect the liquid at the outlet without contaminating the operator or equipment parts.
The tank outlet shall be guarded against accidental opening (see ISO 16119-2:2013, 5.1.1.3.2).
See also 6.1 g) and 6.1 l).
ISO/DIS 4254-6:2026(en)
4.6 Pressure indicator (manometer)
The sprayer shall have a spray liquid pressure indicator. The design of the pressure indicator shall be such
that in case of a leakage there is no unreasonable hazard for the operator. This requirement is deemed to be
fulfilled if either:
— spray liquid carrying hoses are not located in the operator cabin, or
— additional protection shall be provided, for example, by imperforate covers completely covering the
hoses and their connecting devices so that exposure of leakage to the operator shall be avoided.
The working pressure(s) shall be clearly readable from the driver's position. Turning of the head and the
upper body is acceptable. For analogue pressure gauges, the minimum diameter of pressure gauge dial plate
shall be:
— 63 mm where the gauge is positioned within the hand reach of the operator or between the tractor and
the transverse vertical plane formed by the hitch points of the three-point linkage;
— 100 mm in all other cases.
The gauge case shall be isolated from the spray mixture. Pressure exceeding the maximum working
pressure shall be indicated — for example, on the analogue pressure gauge by a red marking and on a digital
instrument by an (audible or optical) indication initiated when the pressure reaches the maximum working
pressure.
See also 6.1 n).
4.7 Protection against overpressure
The sprayer shall be provided with a safety device that prevents the pressure from exceeding the maximum
working pressure of the circuit by more than 20 %. The adjustment of this safety device shall be protected
against unauthorized or accidental modification. Its actuation shall not cause any spillage or leakage of
liquid from the circuit.
4.8 Fan for air-assistance
If a sprayer is equipped with a fan for air-assistance, the following requirements apply.
— The fan shall be placed or protected so that when the sprayer is operating it shall not be able to draw in
or discharge foreign matter which could injure the operator.
— Access to the fan shall be prevented by fixed guards, which may be a combination of imperforate and
mesh guards whose apertures are in accordance with the requirements of ISO 13857:2019, Tables 1, 3, 4
and 6.
— When the fan drive is not controlled independently from the pump drive, it shall be possible to disengage
the fan drive from the pump drive from the ground or from a platform.
See also 6.1 i).
For mounted and trailed sprayers for bush and tree crops, the requirement of ISO 4254-1:2013, 6.1.2, does
not apply.
4.9 Spray liquid carrying hoses
To avoid hazards to the operator in case of leakage,
— hoses shall not be located in the operator cabin, or
— hoses and their connecting devices shall be protected (for example, by imperforate screens).
All pressurized hoses shall be directly and durably marked with the maximum working pressure.

ISO/DIS 4254-6:2026(en)
The maximum working pressure of hoses and the maximum working pressure of connecting devices shall
be at least equal to the maximum working pressure of the circuit (see 4.7) [see also 6.1 n) and 6.2.2].
4.10 Spraying stop control
Each machine shall be equipped at the operator's position with a spraying stop control device to safely stop
the flow (for example, by means of two valves placed in series). When the spraying stop control has been
activated, there shall be no dripping (see also Clause 5).
4.11 Clean water tank
Sprayers shall be equipped with a clean water tank for the operator's use (for example, in case a person has
been in contact with chemicals) having a minimum capacity of 15 l. This tank shall be totally isolated from
the other parts of the machine and shall be fitted with a tap which can be easily opened without the use of a
tool and without being continuously pressed.
See also 6.2.2.
4.12 Storage of personal protective equipment
For the storage of personal protective equipment, a means shall be provided on the machine that allows for
the separation of used and unused personal protective equipment.
4.13 Hitching and clearance zone
For mounted machines, a sufficient clearance between the sprayer and the tractor shall be ensured for
the connection of the driving elements (for example, power transmission), if provided, and/or the control
elements (for example, electric/hydraulic remote control) from the tractor. This shall be achieved by either:
— the clearance zones as shown in Figure 3 on at least one side, so that it is possible to connect the driving
and/or control elements after having coupled the sprayer, or
— the design of the driving and/or control elements so that their connection is possible before coupling the
sprayer in a clearance zone comparable to that shown in Figure 3.
This requirement does not apply to mounted sprayers for bush and tree crops with a nominal volume less
than 400 l.
See also 6.1 (d)
ISO/DIS 4254-6:2026(en)
Dimensions in millimetres
Figure 3 — Clearance zone
4.14 Servicing and maintenance
It shall be possible to carry out servicing and maintenance operations on pumps, filters and pressure
indicators without causing leakage from the tank when it is filled to its nominal volume. This can be achieved
by, for example, appropriate positioning of components, isolation by means of a tap, or the use of valves.
To facilitate machine maintenance and servicing operations, including lubrication, access to and visibility of
machine elements involved, including assembly and disassembly procedures, shall be simplified by means to
minimize exposure to contaminated components.
The position of the filters shall allow minimum spillage onto the user when removing inserts. Controlled
draining of contaminated liquid out of the filter casing shall be allowed, for example drain valve.
See also 6.1.
ISO/DIS 4254-6:2026(en)
4.15 Cleaning of sprayers equipped with recovery panels
In order to minimize the risk of contamination of the operator, recovery panels shall be designed:
— to simplify their maintenance by limiting the number of components to be dismounted (for example,
grids, foams, filters);
— to facilitate cleaning and limit splashes (for example, automatic washing systems).
4.16 Contact between a recovery panel and an obstacle
In the case of contact with an obstacle, in normal conditions of use, this system shall be able to allow the
recovery panel return automatically to its initial position.
4.17 Noise reduction at the design stage
Appropriately designed gearwheels, drives, fan blades (if fitted) and pumps may be seen as measures for
noise reduction at the design stage. For noise measurement, see also Clause 5.
5 Verification of the safety requirements and/or protective measures
Verification of the requirements given in Clause 4 shall be made by means of inspection, calculation, or
testing as appropriate.
The means of verification for the requirements given in ISO 4254-1 are specified in ISO 4254-1. For the
requirements given in this document, the means of verification are either self-evident or verification is made
via the additional means given in Table 1.
Table 1 — Additional means of verification of safety requirements and/or protective measures
given in this document
6 Information for use
6.1 Operator's manual
An operator's manual shall be provided by the manufacturer with each machine.
Content and presentation shall be in accordance with ISO 3600:2022.
Comprehensive instructions and information on all aspects of maintenance and the safe use of the machine,
as well as the need for training, if necessary, shall be provided in the operator’s manual. The information and
items given in ISO 4254-1:2013, Clause 8 and ISO 4254-1:2013/AMD 1:2021 apply.
In particular, the following information shall be included (residual risks):
a) the restarting procedures for the machine after winter/cold season;
b) methods for adjusting the pressure;
c) details of adjustments to be made to the sprayer when various nozzles are used;
d) for mounted sprayers for bush and tree crops not fulfilling the dimensions specified in 4.13, instructions
to mount the sprayer only on tractors fitted with quick coupling three-point linkages according to
ISO 11001-3:2009
ISO/DIS 4254-6:2026(en)
e) the folding-and unfolding and transport procedures for the boom with emphasis on attention to
performing these procedures in an area clear of the potential risk of contact with overhead power lines
(4.3);
f) information regarding the risk of unintentional contact with overhead power lines possible during
spraying operations (for example, due to uneven ground or use of boom levelling devices), and the
requirement for the operator to complete an analysis of the field for deciding on the best working
method — in particular anticipating for in field boom folding-and unfolding during application — before
any spraying operation commences in the area to be sprayed by the machine (4.3);
g) The maximum height of sprayers shall be provided in the operator’s manual. For mounted sprayers the
maximum height shall be indicated in relation to the highest position of the centre of the lower hitch
point of the tractor. Configurations with different tires should be considered when determining the
maximum height.
h) the procedures to be followed for dealing with blocked nozzles and other breakdowns in the field;
i) precautions to be taken against contact with and/or inhalation of hazardous chemicals (4.1.3, 4.5, 4.7,
4.9, 4.11, 4.12, 4.14), at each of the following stages of use:
— filling of the tank and adding of products;
— spraying;
— adjustments;
— draining and cleaning of the tank;
— maintaining and servicing;
reference to available engineering controls and protective measures including any on the PPP label shall be
made as appropriate;
j) the hazards from entering the tank with the whole body;
k) the need to ensure that no other person is standing near the machine, including near the fan (4.8);
l) the procedures to be followed for parking the machine;
m) instructions for stable parking when used on sloping ground, during the folding or where relevant in
case of the risk of pitching of liquids in the tank;
n) the precautions (particularly for limiting the propagation of contamination) to be taken for the cleaning
of the machine;
o) instructions for winter/cold season storage of the sprayer;
p) maximum working pressure of the circuit (see also 4.6, 4.7, 4.9);
q) in addition, the following points shall be emphasized (additional information for the user):
— the requirement that any maintenance intervention, shall only be undertaken after the parts of the
sprayer involved have been cleaned of contamination;
— instructions and specifications of the pump needed for safe replacement;
— need for inspection of spray liquid hoses a
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