Building construction machinery and equipment -- Mobile crushers

This document establishes the safety requirements for mobile crushers, as defined in ISO 21873‑1, for crushing rocks or for reprocessing construction materials and capable of re-location between worksites. It applies to mobile crushers that are either — self-propelled (mounted on a chassis); — lorry (truck) mounted; — or semi-trailer mounted. It does not apply to — fixed (stationary) crushers; — large mining-type movable crushers. This document deals with significant hazards, hazardous situations and events relevant to mobile crushers when used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer. This document is not applicable to machines which are manufactured before the date of its publication.

Machines et matériels pour la construction des bâtiments -- Concasseurs mobiles

General Information

Status
Published
Publication Date
06-May-2019
Current Stage
6060 - International Standard published
Start Date
09-Apr-2019
Completion Date
07-May-2019
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INTERNATIONAL ISO
STANDARD 21873-2
Second edition
2019-05
Building construction machinery and
equipment — Mobile crushers —
Part 2:
Safety requirements and verification
Machines et matériels pour la construction des bâtiments —
Concasseurs mobiles —
Partie 2: Exigences de sécurité et vérification
Reference number
ISO 21873-2:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 21873-2:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 21873-2:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ..............................................................................................................................................................................................................................vii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

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

4 Safety requirements and/or protective/risk reduction measures .................................................................. 3

4.1 General ........................................................................................................................................................................................................... 3

4.2 Access .............................................................................................................................................................................................................. 3

4.3 Operator's station ................................................................................................................................................................................. 3

4.3.1 General...................................................................................................................................................................................... 3

4.3.2 Moving parts ........................................................................................................................................................................ 3

4.3.3 Engine exhaust................................................................................................................................................................... 3

4.3.4 Sharp edges .......................................................................................................................................................................... 3

4.3.5 Pipes and hoses ................................................................................................................................................................. 3

4.3.6 Construction ........................................................................................................................................................................ 3

4.4 Lighting .......................................................................................................................................................................................................... 4

4.5 Operator's controls and indicators ........................................................................................................................................ 4

4.5.1 General...................................................................................................................................................................................... 4

4.5.2 Emergency stop ................................................................................................................................................................ 4

4.5.3 Starting systems ............................................................................................................................................................... 5

4.5.4 Inadvertent activation ................................................................................................................................................. 5

4.5.5 Uncontrolled motion .................................................................................................................................................... 5

4.5.6 Remote control .................................................................................................................................................................. 5

4.5.7 Control panels, instrument and symbols .................................................................................................... 5

4.6 Steering system ...................................................................................................................................................................................... 6

4.7 Brake systems .......................................................................................................................................................................................... 6

4.7.1 General...................................................................................................................................................................................... 6

4.7.2 Parking brakes ................................................................................................................................................................... 6

4.8 Feed hopper and feed device ...................................................................................................................................................... 6

4.8.1 Guarding requirements .............................................................................................................................................. 6

4.8.2 Safety information for the operator's manual ........................................................................................ 6

4.9 Crushing device (crusher) ............................................................................................................................................................. 7

4.9.1 Feed opening ....................................................................................................................................................................... 7

4.9.2 Jaw-type crushing device (jaw-type crusher)......................................................................................... 7

4.9.3 Horizontal shaft impact (HSI) and vertical shaft impact (VSI) crushing device ....... 8

4.9.4 Cone-type crushing device (cone-type crusher) .................................................................................. 9

4.9.5 Roll-type crushing device ......................................................................................................................................... 9

4.10 By-pass device ......................................................................................................................................................................................10

4.10.1 General...................................................................................................................................................................................10

4.10.2 Inadvertent movement ............................................................................................................................................10

4.10.3 Prevention of falling material ............................................................................................................................10

4.10.4 Hazard of trapping or entanglement ...........................................................................................................10

4.11 Magnetic separator ...........................................................................................................................................................................11

4.11.1 Magnetic hazard ............................................................................................................................................................11

4.11.2 Magnet discharge .........................................................................................................................................................11

4.12 Warning devices ..................................................................................................................................................................................11

4.13 Stability .......................................................................................................................................................................................................11

4.14 Noise emission measurement .................................................................................................................................................11

4.14.1 Noise reduction at source .....................................................................................................................................11

4.14.2 Sound power level .......................................................................................................................................................11

4.14.3 Sound pressure level .................................................................................................................................................12

4.15 Protective measures and devices .........................................................................................................................................12

4.15.1 General...................................................................................................................................................................................12

© ISO 2019 – All rights reserved iii
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ISO 21873-2:2019(E)

4.15.2 Hot parts ..............................................................................................................................................................................12

4.15.3 Moving parts .....................................................................................................................................................................12

4.15.4 Guards ....................................................................................................................................................................................12

4.15.5 Isolation of energy sources ..................................................................................................................................13

4.15.6 Sharp edges and acute angles ............................................................................................................................13

4.15.7 Exhaust gases ...................................................................................................................................................................13

4.16 Lifting and tie-down ........................................................................................................................................................................13

4.16.1 Lifting for transport ...................................................................................................................................................13

4.16.2 Tie-down for transport ........................................................................................................................................... .13

4.16.3 Lifting and tie-down for maintenance ........................................................................................................13

4.17 Electromagnetic compatibility (EMC)..............................................................................................................................13

4.18 Electrical and electronic systems .........................................................................................................................................13

4.18.1 General...................................................................................................................................................................................13

4.18.2 Degrees of protection................................................................................................................................................14

4.18.3 Electrical connections ..............................................................................................................................................14

4.18.4 Over-current protective devices ......................................................................................................................14

4.18.5 Batteries ...............................................................................................................................................................................14

4.18.6 Battery disconnection ..............................................................................................................................................14

4.18.7 Electrical connectors for auxiliary starting aids................................................................................15

4.18.8 Electric sockets for lighting .................................................................................................................................15

4.19 Pressurized systems ........................................................................................................................................................................15

4.19.1 General...................................................................................................................................................................................15

4.19.2 Hydraulic lines ................................................................................................................................................................15

4.19.3 Hydraulic hoses ..............................................................................................................................................................15

4.20 Fuel tanks, hydraulic tanks and pressure vessels ..................................................................................................15

4.20.1 General...................................................................................................................................................................................15

4.20.2 Filler openings ................................................................................................................................................................16

4.20.3 Fuel tanks ............................................................................................................................................................................16

4.20.4 Hydraulic tanks ..............................................................................................................................................................16

4.20.5 Air pressure vessels ...................................................................................................................................................16

4.21 Fire protection ......................................................................................................................................................................................16

4.21.1 Fire resistance .................................................................................................................................................................16

4.21.2 Fire extinguisher ...........................................................................................................................................................16

4.22 Maintenance ...........................................................................................................................................................................................16

4.22.1 General...................................................................................................................................................................................16

4.22.2 Frequent maintenance .............................................................................................................................................16

4.22.3 Support devices .............................................................................................................................................................17

4.22.4 Access to the engine compartment ...............................................................................................................17

5 Verification of safety requirements and/or protective/risk reduction measures .......................17

6 Information for use .........................................................................................................................................................................................17

6.1 Safety labels ............................................................................................................................................................................................17

6.2 Operator's manual ............................................................................................................................................................................17

6.2.1 Content ..................................................................................................................................................................................17

6.2.2 Storage of manual ........................................................................................................................................................19

6.3 Marking ......................................................................................................................................................................................................19

Annex A (informative) List of significant hazards................................................................................................................................20

Annex B (informative) Conveyor guard recommendations .......................................................................................................23

Annex C (informative) Guidelines for safely clearing blocked crushers ......................................................................33

Bibliography .............................................................................................................................................................................................................................36

iv © ISO 2019 – All rights reserved
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ISO 21873-2:2019(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 on 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 the following

URL: www .iso .org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 195, Building construction machinery and

equipment.

This second edition cancels and replaces the first edition (ISO 21873-2:2009), which has been

technically revised.
The main changes compared to the previous edition are as follows:
— general — applying to the entire document:
— "and verification" has been added to the title for consistency;

— additional clause numbering has been added for better readability and consistency;

— "this part of ISO 21873" has been changed to "this document";

— in the Introduction, additional information has been added to conform with ISO Guide 78;

— in Clause 2, normative references have been updated as appropriate;

— in Clause 3, a reference to the ISO and IEC terminological databases has been added;

— in Clause 4:

— 4.2 has been simplified as the former text was already covered in the reference;

— in 4.3.2, examples have been added;

— in 4.4, the text related to visibility has been removed as it was ambiguous and not verifiable;

— in the title of 4.5, the term "Operator's" has been added;
— a new 4.5.6 relating to remote control has been added;
© ISO 2019 – All rights reserved v
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ISO 21873-2:2019(E)

— 4.7 on brake systems has been split into 2 parts: one general and one for parking brakes;

— in 4.9, the term "crusher" has been replaced by "crushing device";
— in 4.8, 4.9, 4.10, and 4.11, titles have been added for better readability;

— in 4.9.5, gyratory crushers have been removed and the clause has been rewritten;

— in 4.14, an alternative method for noise emission measurement has been added;

— in 4.16, lifting and tie-down clarifications have been added on what requirements are for

transport and what requirements are for maintenance;
— in Clause 5, clarifications have been made regarding documentation;

— in Clause 6, the term "machine" has been removed when relating to safety labels;

— in Annex A:
— references have been updated as appropriate;
— column for ISO 12100-2 has been removed;
— in Annex C, a new general warning related to rock breakers has been added;

— in the Bibliography, the references have been updated and a reference to ISO 13732-1 for hot surfaces

has been added.
A list of all parts in the ISO 21873 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.
vi © ISO 2019 – All rights reserved
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ISO 21873-2:2019(E)
Introduction
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 (regulators, accident prevention organisations, 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 the 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 or hazardous events

are covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those which are stated in type-A or -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.

This document deals with mobile crushers which are used for crushing rocks or reprocessing

construction materials.
© ISO 2019 – All rights reserved vii
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INTERNATIONAL STANDARD ISO 21873-2:2019(E)
Building construction machinery and equipment — Mobile
crushers —
Part 2:
Safety requirements and verification
1 Scope

This document establishes the safety requirements for mobile crushers, as defined in ISO 21873-1,

for crushing rocks or for reprocessing construction materials and capable of re-location between

worksites.
It applies to mobile crushers that are either
— self-propelled (mounted on a chassis);
— lorry (truck) mounted;
— or semi-trailer mounted.
It does not apply to
— fixed (stationary) crushers;
— large mining-type movable crushers.

This document deals with significant hazards, hazardous situations and events relevant to mobile

crushers when used as intended and under the conditions of misuse which are reasonably foreseeable

by the manufacturer.

This document is not applicable to machines which are manufactured before the date of its publication.

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 2860, Earth-moving machinery — Minimum access dimensions
ISO 2867, Earth-moving machinery — Access systems
ISO 3457, Earth-moving machinery — Guards — Definitions and requirements

ISO 3744, Acoustics — Determination of sound power levels and sound energy levels of noise sources using

sound pressure — Engineering methods for an essentially free field over a reflecting plane

ISO 3795, Road vehicles, and tractors and machinery for agriculture and forestry — Determination of

burning behaviour of interior materials

ISO 4413, Hydraulic fluid power — General rules and safety requirements for systems and their components

ISO 6011, Earth-moving machinery — Visual display of machine operation

ISO 6405-1, Earth-moving machinery — Symbols for operator controls and other displays — Part 1:

Common symbols
© ISO 2019 – All rights reserved 1
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ISO 21873-2:2019(E)
ISO 6750, Earth-moving machinery — Operator's manual — Content and format
ISO 9244, Earth-moving machinery — Machine safety labels — General principles

ISO 9247, Earth-moving machinery — Electrical wires and cables — Principles of identification and marking

ISO 10264, Earth-moving machinery — Key-locked starting systems

ISO 10265, Earth-moving machinery — Crawler machines — Performance requirements and test

procedures for braking systems
ISO 10533, Earth-moving machinery — Lift-arm support devices
ISO 10968:2004, Earth-moving machinery — Operator’s controls

ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 12508, Earth-moving machinery — Operator station and maintenance areas — Bluntness of edges

ISO 13766-1, Earth-moving and building construction machinery — Electromagnetic compatibility (EMC)

of machines with internal electrical power supply — Part 1: General EMC requirements under typical

electromagnetic environmental conditions

ISO 13766-2, Earth-moving and building construction machinery — Electromagnetic compatibility (EMC) of

machines with internal electrical power supply — Part 2: Additional EMC requirements for functional safety

ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principles

for design
ISO 13850, Safety of machinery — Emergency stop function — Princ
...

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