ISO 20474-1:2017

INTERNATIONAL ISO
STANDARD 20474-1
Second edition
2017-07
Earth-moving machinery — Safety —
Part 1:
General requirements
Engins de terrassement — Sécurité —
Partie 1: Sécurité
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 4
4 Safety requirements and protective measures . 6
4.1 General . 6
4.2 Access systems . 7
4.2.1 General requirements . 7
4.2.2 Access to articulated machines . 7
4.3 Operator’s station . 7
4.3.1 General requirements . 7
4.3.2 Operator’s station equipped with a cab . 8
4.3.3 Operator-protective structures . 9
4.3.4 Falling-object protective structures (FOPS) .10
4.3.5 Elevating operator’s station .10
4.3.6 Replacement of operator protective structure .10
4.4 Seats .10
4.4.1 Operator’s seat .10
4.4.2 Additional seat .10
4.5 Operator’s controls and indicators .11
4.5.1 General.11
4.5.2 Starting and stopping system .11
4.5.3 Inadvertent activation .11
4.5.4 Pedals .11
4.5.5 Emergency attachment lowering .11
4.5.6 Uncontrolled motion .12
4.5.7 Remote control .12
4.5.8 Visual displays/control panels, indicators and symbols .12
4.5.9 Ride-on machine controls accessible from ground level.12
4.5.10 Non-riding machine controls .12
4.6 Steering systems .12
4.6.1 General.12
4.6.2 Wheeled machines .12
4.6.3 Crawler machines.13
4.7 Brake systems .13
4.8 Visibility .13
4.8.1 Operator’s field of view .13
4.8.2 Lighting, signalling and marking lights, and reflex-reflector devices .13
4.9 Warning devices and safety signs .13
4.10 Tyres and rims .14
4.11 Stability .14
4.12 Object handling .14
4.12.1 Lifting devices for object handling .14
4.12.2 Lowering control device .14
4.13 Noise .14
4.13.1 Requirements for noise reduction .14
4.13.2 Noise emission measurement .14
4.14 Protective measures and devices .15
4.14.1 Contaminated area .15
4.14.2 Hot parts .15
4.14.3 Moving parts .15
4.14.4 Guards .15
4.14.5 Articulated frame lock . .15
4.14.6 Sharp edges and acute angles .15
4.14.7 Fenders .15
4.15 Retrieval, transportation, lifting and towing .16
4.15.1 Common use .16
4.15.2 Retrieval .16
4.15.3 Tying-down.16
4.15.4 Lifting . .16
4.15.5 Off-road towing .16
4.15.6 Transportation .16
4.16 Electrical and electronic systems .16
4.16.1 General.16
4.16.2 Degree of protection .17
4.16.3 Electrical connections .17
4.16.4 Over-current protective devices .17
4.16.5 Batteries .17
4.16.6 Battery disconnection .17
4.16.7 Electrical connectors for auxiliary starting aids.17
4.16.8 Electric sockets for lighting .17
4.17 Pressurized systems .18
4.17.1 General requirements .18
4.17.2 Hydraulic lines .18
4.17.3 Hydraulic hose assemblies .18
4.17.4 Air pressure vessels .
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