kSIST FprEN 474-5:2017

Earth-moving machinery - Safety - Part 5: Requirements for hydraulic excavators

This document, together with part 1, deals with all significant hazards for earth-moving machinery - hydraulic excavators when they are used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer associated with the whole life time of the machine (see Clause 4).
The requirements of this part are complementary to the common requirements formulated in
prEN 474-1. This document does not repeat the requirements from prEN 474-1, but adds or replaces the requirements for application for earth moving machinery - hydraulic excavators.
This part also deals with derivated machinery and derivated use, e.g. lifting operation application, shovel application, log application, grapple application, magnetic plate application.
This European Standard is not applicable to hydraulic excavators manufactured before the date of publication of this European Standard by CEN.

Erdbaumaschinen - Sicherheit - Teil 5: Anforderungen für Hydraulikbagger

Dieses Dokument behandelt zusammen mit Teil 1 alle signifikanten Gefährdungen für Erdbaumaschinen — Hydraulikbagger, wenn sie bestimmungsgemäß verwendet werden sowie unter den vernünftigerweise vom Hersteller vorhersehbaren Fehlanwendungen für die gesamte Lebensdauer der Maschine (siehe Abschnitt 4).
Die Anforderungen dieses Teils gelten ergänzend zu den allgemeinen Anforderungen der prEN 474-1. Dieses Dokument wiederholt nicht die Anforderungen der prEN 474-1, sondern ergänzt oder ersetzt diese für den Einsatz von Erdbaumaschinen — Hydraulikbaggern.
Dieser Teil beschäftigt sich außerdem mit artverwandten Maschinen und artverwandten Verwendungen, z. B. dem Hebebetrieb, dem Einsatz mit Ladeschaufel, Baumklammer, Greifer und Magnetplatte.
Diese Europäische Norm ist nicht anzuwenden für Hydraulikbagger, die vor der Veröffentlichung dieser Europäischen Norm durch CEN hergestellt wurden.

Engins de terrassement - Sécurité - Partie 5 : Prescriptions applicables aux pelles hydrauliques

Le présent document traite, avec la partie 1, de tous les phénomènes dangereux significatifs liés aux engins de terrassement et aux pelles hydrauliques, lorsqu'ils sont utilisés normalement et dans de mauvaises conditions raisonnablement prévisibles par le fabricant, associés à toute la durée de vie des machines (voir Article 4).
Les prescriptions figurant dans la présente partie sont complémentaires des prescriptions communes présentées dans la norme prEN 474-1. La présente partie ne répète pas les prescriptions de la prEN 474-1 mais en ajoute ou en remplace certaines pour les engins de terrassement et les pelles hydrauliques.
La présente partie traite également des engins dérivés et des applications dérivées, par exemple des utilisations en opération de levage, en pelle, en grume, avec pince et avec plateau magnétique.
La présente Norme européenne ne s’applique pas aux pelles hydrauliques fabriquées avant la publication de la présente Norme européenne par le CEN.

Stroji za zemeljska dela - Varnost - 5. del: Zahteve za hidravlične bagre

General Information

• Status: Not Published
• Public Enquiry End Date: 21-Jun-2017
• ICS: 53.100 - Earth-moving machinery
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 24-Nov-2021
• Due Date: 12-Jan-2022
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: FprEN 474-5 - Earth-moving machinery - Safety - Part 5: Requirements for hydraulic excavators

RELATIONS

• Revised: SIST EN 474-5:2007+A3:2014 - Earth-moving machinery - Safety - Part 5: Requirements for hydraulic excavators
• Effective Date: 11-Feb-2015

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 474-5:2017
01-junij-2017
6WURML]D]HPHOMVNDGHOD9DUQRVWGHO=DKWHYH]DKLGUDYOLþQHEDJUH
Earth-moving machinery - Safety - Part 5: Requirements for hydraulic excavators

Engins de terrassement - Sécurité - Partie 5 : Prescriptions applicables aux pelles

hydrauliques
Ta slovenski standard je istoveten z: prEN 474-5
ICS:
53.100 Stroji za zemeljska dela Earth-moving machinery
oSIST prEN 474-5:2017 en,fr,de

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

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oSIST prEN 474-5:2017
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oSIST prEN 474-5:2017
DRAFT
EUROPEAN STANDARD
prEN 474-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2017
ICS Will supersede EN 474-5:2006+A3:2013
English Version
Earth-moving machinery - Safety - Part 5: Requirements
for hydraulic excavators
Engins de terrassement - Sécurité - Partie 5 :
Prescriptions applicables aux pelles hydrauliques

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 151.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 474-5:2017 E

worldwide for CEN national Members.
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oSIST prEN 474-5:2017
prEN 474-5:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

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

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

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

4 List of additional significant hazards ....................................................................................................... 7

5 Safety requirements and/or measures ................................................................................................... 7

5.1 General ................................................................................................................................................................ 7

5.2 Operator's station ........................................................................................................................................... 7

5.2.1 Minimum space envelope ............................................................................................................................. 7

5.2.2 Operator's protection .................................................................................................................................... 7

5.2.3 Operator's seat ................................................................................................................................................. 8

5.3 Defrosting system ........................................................................................................................................... 8

5.4 Operator's controls and indicators ........................................................................................................... 8

5.5 Steering system ................................................................................................................................................ 9

5.6 Swing brakes ..................................................................................................................................................... 9

5.7 Stability and safety devices ......................................................................................................................... 9

5.7.1 General ................................................................................................................................................................ 9

5.7.2 Bucket and shovel application ................................................................................................................... 9

5.7.3 Log application ................................................................................................................................................. 9

5.7.4 Lifting operation application ................................................................................................................... 10

5.8 Specific requirements for parking brake ............................................................................................ 11

5.9 Additional/modified requirements for walking excavators ........................................................ 11

5.9.1 Operator's station - Visibility ................................................................................................................... 11

5.9.2 Wheel brake system .................................................................................................................................... 11

5.9.3 Operator's protection ................................................................................................................................. 11

5.9.4 Stability ............................................................................................................................................................ 11

5.9.5 Recovery, towing away for recovery purposes (TARP), tying-down, lifting and

transporting ................................................................................................................................................... 13

6 Verification ..................................................................................................................................................... 13

7 Information for use ..................................................................................................................................... 14

Annex A (informative) List of additional significant hazards – Hydraulic excavators ....................... 16

Annex B (informative) Rated lift capacity charts for lifting operation .................................................... 18

B.1 General ............................................................................................................................................................. 18

B.2 Identification ................................................................................................................................................. 18

B.3 Illustration ...................................................................................................................................................... 18

B.4 Working conditions ..................................................................................................................................... 18

Annex C (normative) Requirements for excavator swing brakes ............................................................. 22

C.1 General ............................................................................................................................................................. 22

C.2 Terms and definitions ................................................................................................................................ 22

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prEN 474-5:2017 (E)

C.3 Minimum performance requirements .................................................................................................. 23

C.3.1 Swing drive system ...................................................................................................................................... 23

C.4 Conditions for testing .................................................................................................................................. 24

C.4.1 Testing the swing service brake .............................................................................................................. 24

C.4.2 Testing the swing parking brake ............................................................................................................ 26

C.4.3 Testing the swing lock................................................................................................................................. 26

C.5 Test report ...................................................................................................................................................... 26

Annex D (informative) Illustrations ...................................................................................................................... 27

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC machinery, and amending

Directive 95/16/EC (recast) [2006 L157] aimed to be covered .................................................. 31

Bibliography ................................................................................................................................................................. 32

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oSIST prEN 474-5:2017
prEN 474-5:2017 (E)
European foreword

This document (prEN 474-5:2017) has been prepared by Technical Committee CEN/TC 151

“Construction equipment and building material machines - Safety”, the secretariat of which is held by

DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 474-5:2006+A1:2013.

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.
For bibliographic references, see prEN 474-1:2017.
prEN 474 ”Earth-moving machinery — Safety” comprises the following parts:
— Part 1: General requirements
— Part 2: Requirements for tractor-dozers
— Part 3: Requirements for loaders
— Part 4: Requirements for backhoe-loaders
— Part 5: Requirements for hydraulic excavators
— Part 6: Requirements for dumpers
— Part 7: Requirements for scrapers
— Part 8: Requirements for graders
— Part 9: Requirements for pipelayers
— Part 10: Requirements for trenchers
— Part 11: Requirements for earth and landfill compactors
— Part 12: Requirements for cable excavators
— Part 13: Requirements for rollers

This European Standard is intended for use in combination with part 1 of the series.

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oSIST prEN 474-5:2017
prEN 474-5:2017 (E)
Introduction
This part of prEN 474 is a type C standard as stated in EN ISO 12100:2010.

The machinery concerned and the extent to which hazards, hazardous situations and events are covered

are indicated in the scope of this European Standard.

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.
1 Scope

This document, together with part 1, deals with all significant hazards for earth-moving machinery –

hydraulic excavators when they are used as intended and under the conditions of misuse which are

reasonably foreseeable by the manufacturer associated with the whole life time of the machine (see

Clause 4).

The requirements of this part are complementary to the common requirements formulated in

prEN 474-1. This document does not repeat the requirements from prEN 474-1, but adds or replaces the

requirements for application for earth moving machinery – hydraulic excavators.

This part also deals with derivated machinery and derivated use, e.g. lifting operation application, shovel

application, log application, grapple application, magnetic plate application.

This European Standard is not applicable to hydraulic excavators manufactured before the date of

publication of this European Standard by CEN.
2 Normative references

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

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

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

prEN 474-1:2017, Earth-moving machinery — Safety — Part 1: General requirements

EN 12643:2014, Earth-moving machinery — Rubber-tyred machines — Steering requirements (ISO

5010:1992 modified)

EN 13531:2001+A1:2008, Earth-moving machinery — Tip-over protection structure (TOPS) for compact

excavators — Laboratory tests and performance requirements (ISO 12117:1997 modified)

EN ISO 3471:2008, Earth-moving machinery — Roll-over protective structures — Laboratory tests and

performance requirements (ISO 3471:2008)

EN ISO 5353:1998, Earth-moving machinery and tractors and machinery for agriculture and forestry - Seat

index point (ISO 5353:1995)

EN ISO 6165:2012, Earth-moving machinery — Basic types — Identification and terms and definitions (ISO

6165:2012)

EN ISO 7096:2008, Earth-moving machinery — Laboratory evaluation of operator seat vibration (ISO

7096:2000)
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EN ISO 12100:2010, Safety of machinery— General principles for design — Risk assessment and risk

reduction (ISO 12100:2010)

ISO 5006:2009, Earth-moving machinery — Operator's field of view — Test method and performance

criteria

ISO 6016:2008, Earth-moving machinery — Methods of measuring the masses of whole machines, their

equipment and components

ISO 7451:2007, Earth-moving machinery — Volumetric ratings for hoe-type and grab-type buckets of

hydraulic excavators and backhoe loaders

ISO 7546:1983, Earth-moving machinery — Loader and front loading excavator buckets — Volumetric

ratings

ISO 10262:1998, Earth-moving machinery — Hydraulic excavators — Laboratory tests and performance

requirements for operator protective guards
ISO 10567:2007, Earth-moving machinery — Hydraulic excavators — Lift capacity
3 Terms and definitions

For the purposes of this document, the terms and definitions given in prEN 474-1:2017,

EN ISO 12100:2010 and the following apply.

Note 1 to entry: Terminology for hydraulic excavators are specified in ISO 7135:2009 and illustrated in Annex D

of this European Standard.

Note 2 to entry: Definitions used in EN and ISO standards referred to in this European Standard are also valid for

this document.
3.1
hydraulic excavator

self-propelled machine on crawler, wheels or legs, having an upper structure normally capable of 360°

swing with mounted equipment, primarily designed for excavating with bucket, without moving the

undercarriage during the work cycle

Note 1 to entry: An excavator work cycle normally comprises excavating, elevating, swinging and discharging

material (see EN ISO 6165:2012). Hydraulic excavators can also be used for material handling/transportation.

3.1.1
minimal swing radius excavator (MSRX)

excavator for operation in confined space having an upper structure with a short swing radius

(equipment and attachment swing within 120 % of the width of the undercarriage)
3.1.2
compact excavator

excavator and minimal swing radius excavator with an operating mass (see ISO 6016:2008) of less than

or equal to 6 000 kg
3.2
walking excavator

excavator with three or more supporting legs which may be articulated, telescopic or both and which can

be fitted with wheels
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prEN 474-5:2017 (E)
4 List of additional significant hazards
See Annex A.

NOTE Annex A (normative) contains all the significant hazards, hazardous situations and events, as far as they

are dealt with in this European Standard, identified by risk assessment as significant for this type of machinery and

which require action to eliminate or reduce the risk
5 Safety requirements and/or measures
5.1 General

Hydraulic excavators shall comply with the requirements of prEN 474-1:2017, as far as not modified or

replaced by the requirements of this part.
5.2 Operator's station
5.2.1 Minimum space envelope

On excavators with retractable front window, the cab height above SIP (see EN ISO 5353) shall not be

less than 920 mm measured with the window retracted into the cab.
5.2.2 Operator's protection
5.2.2.1 Roll over and tip over protective structures (ROPS and TOPS)

prEN 474-1:2017, 5.3.3 does not apply for hydraulic excavators except for walking excavators, see 5.7.3.

prEN 474-1:2017, Annex B, B.7.1 does not apply for hydraulic excavators with moveable cabs.

Compact excavators with an operating mass greater than 1 t and less than or equal to 6 t according to

ISO 6016:2008 shall be equipped with a tip-over protective structure (TOPS).
TOPS shall meet the requirements of EN 13531:2001+A1:2008.

Machines with no cab riser or with fixed cab riser up to 500 mm and with an operating mass greater than

6 t and less than or equal to than 50 t according to ISO 6016:2008 shall be equipped with ROPS.

ROPS shall meet the requirements of ISO 12117-2:2008 and its Cor 1:2010.

Machines with fixed cab riser above 500 mm or with movable operator’s station and with an operating

mass greater than 6 t and less than or equal to 50 t according to ISO 6016:2008 shall, where the risk of

rolling over exists, based on the intended use of the machine as specified by the manufacturer in the

operator’s manual, be equipped with a roll over protective structure (ROPS). ROPS shall meet the

requirements of ISO 12117-2:2008 and its Cor 1:2010. Where ROPS is not required a tip-over protective

structure (TOPS) shall be fitted. For evaluation of the performance of the TOPS, ISO 12117-2 shall be used

in respect of lateral loading only and with the following lateral load energy:
1,25
Lateral load energy Us (J) = 6 500 x (M/10 000) .

For machines with a movable operator’s station as defined in prEN 474-1:2017, Annex B, the ROPS and

TOPS tests shall be performed with the operator station in the machine travel position. The operator

station mounted to the moving linkage components shall be attached to the upper swing frame. The boom

and any boom lift cylinders shall be attached to the upper swing frame as applicable based on potential

contact with them during the test. The test load(s) shall be applied to the operator’s station structure as

specified in ISO 12117-2.

NOTE The test includes the whole lifting configuration (e.g.cab riser frame and mounted cab). The test load is

not directly applied at the cab riser frame.
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TOPS shall be labelled in accordance with ISO 12117-2:2008, Clause 9, except that the standard referred

to shall be prEN 474-5:2017.
5.2.2.2 Operator’s protective guard
prEN 474-1:2017, 5.3.4 shall be replaced by the following:

For excavators with an operating mass less than or equal to 1 500 kg Operator’s Protective Guard

requirements do not apply.
If an Operator’s Protective Guard needs to be fitted, the following applies:

— excavators with an operating mass greater than 1 500 kg according to ISO 6016:2008 shall be fitted

with Operator’s Protective Guard meeting the requirements of ISO 10262:1998, Level I;

— excavators if used in demolition application shall be fitted with Operator’s Protective Guard meeting

the requirements of ISO 10262:1998, Level II;

— excavators with an operating mass greater than 6 000 kg according to ISO 6016:2008 shall be fitted

with Operator’s Protective Guard meeting the requirements of ISO 10262:1998, Level II.

5.2.3 Operator's seat
5.2.3.1 Seat adjustment for compact excavators
prEN 474-1:2017, 5.4.1.3 shall apply with the following modification:

prEN 474-1:2017, 5.4.1.3, 2nd paragraph applies to excavators with an operating mass (see

ISO 6016:2008) of less than 3 000 kg.
5.2.3.2 Vibration
prEN 474-1:2017, 5.4.1.4, shall apply with the following modifications:

For excavators greater than 6 000 kg the seat shall comply with spectral class EM 6 of EN ISO 7096:2008.

NOTE Even there is no requirement on seat suspension for seats used in excavators (see EN ISO 7096:2008,

1.4), this clause makes reference to EN ISO 7096:2008.
5.3 Defrosting system
FprEN 474-1:2017, 5.3.2.1.3 shall be replaced by the following:

A system shall be provided to defrost the front windscreen for example by means of a heating system or

a particular defrosting device.

The defrosting system for the front windscreen shall meet the requirements specified in

ISO 10263-5:2009.

A system shall be provided to defrost the rear window, when visibility (see ISO 5006) through the rear

window is needed, for example by means of a heating system or a particular defrosting device.

The defrosting system for the rear window shall meet the requirements specified in ISO 10263-5:2009.

5.4 Operator's controls and indicators
prEN 474-1:2017, 5.5.1 d) shall be replaced by the following:

The movements of the controls for driving and steering do not need to correspond to the intended

direction of movement if the upper structure is not in the normal driving direction.

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prEN 474-5:2017 (E)
5.5 Steering system
prEN 474-1:2017, 5.6.1 shall be replaced by the following:

The movements of the controls for steering do not need to correspond to the intended direction of

movement if the upper structure is not in the normal driving direction.
prEN 474-1:2017, 5.6.2 shall apply with the following addition:

For machines with a travel speed equal to or lower than 20 km/h shall comply with EN 12643:2014,

except for the requirements for emergency steering.
5.6 Swing brakes
Swing brakes shall comply with the requirements as defined in Annex C.
5.7 Stability and safety devices
5.7.1 General
prEN 474-1:2017, 5.11 shall apply with the additions given in 5.7.1 to 5.7.4.

All rated capacities as defined hereafter are based on test and/or calculations of machines being level and

on firm supporting surface.

The mass of the intended load, its density and the location of its centre of gravity as well as the mass of

the attachment and the attachment bracket, if fitted, shall be included in the determination of the rated

lift capacity and the size/capacity of the attachment.

To provide a sufficient stability, the rated lift capacity in intended operations shall be determined in

accordance with 5.7.2 to 5.7.4.
5.7.2 Bucket and shovel application

The rated lift capacity for an excavator used in bucket or shovel application shall be determined either

by:

— rated tipping load according to ISO 10567:2007, 3.8, in the most unfavourable position, or

— hydraulic lift capacity according to ISO 10567:2007, 3.11
whichever is less.

The volumetric rating of the bucket or shovel shall be determined according to ISO 7451:2007 or

ISO 7546:1983.

The mass and the volumetric rating of the bucket and the density of the material have to be taken into

account when a bucket is selected for a specific application.
5.7.3 Log application

The rated lift capacity in stationary log application shall be determined either by:

— rated tipping load according to ISO 10567:2007, 3.8, with a log in the most unfavourable position, or

— hydraulic lift capacity according to ISO 10567:2007, 3.11
whichever is less.

The rated lift capacity in moving (driving with load, oscillating axle locked) log application shall be

determined either by:
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— rated tipping load as 60 % of the tipping load according to ISO 10567:2007, 3.7, with a log in the most

unfavourable position, or
— hydraulic lift capacity according to ISO 10567:2007, 3.11
whichever is less.
5.7.4 Lifting operation application
5.7.4.1 General

prEN 474-1:2017, 5.12 shall apply to all machines which can be fitted with a lifting device even if the

initial intended use does not involve a lifting operation and where:

a) the maximum rated lift capacity according to prEN 474-1:2017, 3.6 is greater than or equal to

1 000 kg, at a minimum lift point radius as defined in ISO 10567:2007, 3.5
b) an overturning moment greater than or equal to 40 000 Nm,
and

c) where the operating mass, according to ISO 6016:2008 is lower or equal to 50 000 kg.

prEN 474-1:2017, 5.12 shall also apply to machines where the operating mass is greater than 50 000 kg

according to ISO 6016:2008 and intended for use in lifting operations.
5.7.4.2 Rated lift capacity in lifting operation

The rated lift capacity in lifting operation shall be determined according to ISO 10567:2007, 3.13.

5.7.4.3 Lowering control device

prEN 474-1:2017, 5.12.3 shall apply to excavators according to prEN 474-5:2017, 5.7.4.1.

5.7.4.4 Overload warning device

prEN 474-1:2016, 5.12.4 shall apply to excavators according to prEN 474-5:2017, 5.7.4.1.

5.7.4.5 Load capacity indicator
prEN 474-1:2017, 5.12.5 does not apply.
5.7.4.6 Rated capacity limiting device
prEN 474-1:2017, 5.12.6 does not apply.
5.7.4.7 Rated lift capacity chart in lifting operation

prEN 474-1:2017, 5.12.7 shall apply to excavators according to prEN 474-5:2017, 5.7.4.1 of with the

following addition:

A chart of the rated lift capacity in lifting operation in relation to the reach and turntable position,

established by the manufacturer, shall be provided. Annex B gives an example for such a chart.

The chart(s) shall be available at the operator's station for each lifting configuration specified in the

operator’s manual.
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5.7.4.8 Other applications

The rated lift capacity of derivated machinery shall be determined by the manufacturer according to the

load specification given in 5.7.4.1, whereby the comparable hazard has to be considered for the special

application.
5.8 Specific requirements for parking brake
prEN 474-1:2017, 5.7 shall appy with the following modification:

For crawler excavators less than or equal to 3 000 kg, the working tool (e.g. bucket) or a special

attachment (e.g. dozer blade) can alternatively be used to immobilise the machine. The procedure to

secure the crawler excavator shall be described in the operator’s manual.
5.9 Additional/modified requirements for walking excavators
5.9.1 Operator's station - Visibility
prEN 474-1:2017, 5.8.1 shall apply with the following additions:
The requirements of ISO 5006:2006, Table 1 for crawler excavators apply.

The ground contacting part of each leg shall in all possible positions be visible from the operator's station

to ensure that the operator can place the legs on firm ground.
5.9.2 Wheel brake system

prEN 474-1:2016, 5.7 does not apply to walking excavators with not more than two wheels.

5.9.3 Operator's protection
5.9.3.1 Roll-over protective structures (ROPS)

Walking excavators shall be fitted with rollover protective structures (ROPS) that meet the requirements

of EN ISO 3471:2008 for backhoe-loaders of equivalent mass.
5.9.3.2 Legs, hydraulic circuit

All leg cylinders shall be fitted with lock valves to prevent the machine from becoming unstable in case

of a hydraulic system failure.
5.9.4 Stability
The stability is determined by the following test conditions:
a) levelled and firm supporting test surface;

b) stabilizer and wheels (at max. spread position) extended as specified by the manufacturer;

c) levelled position of the lower side of the under carriage; approximately 350 mm above the test

surface;
...