prEN ISO 19472-2

Machinery for forestry - Winches - Dimensions, performance and safety - Part 2: Traction aid winches (ISO/DIS 19472-2:2020)

This International Standard defines dimensions and specifies performance and safety requirements for traction assistance/tethering winches used in forestry for assisting supported machines while going uphill and downhill (pulling and braking). It is applicable to fixed and detachable winches and their components, connections and communications, which are used with mobile and self-propelled forestry machinery as defined in ISO 6814 such as harvesters, forwarders, skidders, planting machines, machines for forest ground preparation and machines for extracting residual waste. These machines can be equipped with wheels and/or tracks. It is applicable to autonomous traction assistance winch systems which are installed on a position away from the supported machine too. It is not applicable to traction assistance winches which are not using a controlled rope force while going downhill and winches used for skidding, hoisting operations on cranes, draglines, high lead logging, rope, logging systems or yarding. The safe use of traction assistance systems covered by this standard requires the supported machines to be able to remain at least stationary on any position of the slope they are driving on without using rope support.

Forstmaschinen - Winden - Maße, Leistung und Sicherheit - Teil 2: Traktionshilfs- und Unterstützungswinden (ISO/DIS 19472-2:2020)

Matériels forestiers - Treuils - Dimensions, performances et sécurité - Partie 2: Treuils d’aide à la traction (ISO/DIS 19472-2:2020)

Gozdarski stroji - Vitli - Mere, lastnosti in varnost - 2. del: Vlečni pomožni vitli (ISO/DIS 19472-2:2020)

General Information

• Status: Not Published
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: CEN/TC 144 - Tractors and machinery for agriculture and forestry
• Drafting Committee: CEN/TC 144/WG 8 - Forestry machinery
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 19-Apr-2021
• Completion Date: 19-Apr-2021
• 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: oSIST prEN ISO 19472-2:2020 - Machinery for forestry - Winches - Dimensions, performance and safety - Part 2: Traction aid winches (ISO/DIS 19472-2:2020)

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 19472-2:2020
01-april-2020

Gozdarski stroji - Vitli - Mere, lastnosti in varnost - 2. del: Vlečni pomožni vitli

(ISO/DIS 19472-2:2020)

Machinery for forestry - Winches - Dimensions, performance and safety - Part 2: Traction

aid winches (ISO/DIS 19472-2:2020)

Forstmaschinen - Winden - Maße, Leistung und Sicherheit - Teil 2: Traktionshilfs- und

Unterstützungswinden (ISO/DIS 19472-2:2020)

Matériels forestiers - Treuils - Dimensions, performances et sécurité - Partie 2: Treuils

d’aide à la traction (ISO/DIS 19472-2:2020)
Ta slovenski standard je istoveten z: prEN ISO 19472-2
ICS:
65.060.80 Gozdarska oprema Forestry equipment
oSIST prEN ISO 19472-2:2020 en,fr,de

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

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oSIST prEN ISO 19472-2:2020
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oSIST prEN ISO 19472-2:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 19472-2
ISO/TC 23/SC 15 Secretariat: SFS
Voting begins on: Voting terminates on:
2020-02-03 2020-04-27
Machinery for forestry — Winches — Dimensions,
performance and safety —
Part 2:
Traction aid winches
ICS: 65.060.80
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 19472-2:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
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oSIST prEN ISO 19472-2:2020
ISO/DIS 19472-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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

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Published in Switzerland
ii © ISO 2020 – All rights reserved
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oSIST prEN ISO 19472-2:2020
ISO/DIS 19472-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

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

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

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

4 Safety requirements for traction aid winches ....................................................................................................................... 7

4.1 Design ............................................................................................................................................................................................................ 7

4.1.1 General...................................................................................................................................................................................... 7

4.1.2 Mechanical safety ............................................................................................................................................................ 7

4.2 Rope drive ................................................................................................................................................................................................... 7

4.2.1 Rope ............................................................................................................................................................................................ 9

4.3 Combination of the supported machine with the traction aid winch system................................... 9

4.4 Brake systems .......................................................................................................................................................................................10

4.5 Electrical safety ...................................................................................................................................................................................10

4.6 Operator Controls.............................................................................................................................................................................10

4.7 Machine control system ...............................................................................................................................................................10

4.7.1 General...................................................................................................................................................................................10

4.7.2 Operation mode .............................................................................................................................................................10

4.7.3 Remote control system ............................................................................................................................................11

4.7.4 Safety relevant functions .......................................................................................................................................11

4.8 Operator protection .........................................................................................................................................................................11

4.9 Additional requirements for removable traction aid winches ...................................................................11

4.10 Additional requirements for remote traction aid winches ............................................................................12

4.11 Noise emissions ...................................................................................................................................................................................13

4.12 Vibration ....................................................................................................................................................................................................13

4.13 Fire Risks ...................................................................................................................................................................................................13

4.14 Maintenance ...........................................................................................................................................................................................13

4.15 Access system ........................................................................................................................................................................................13

5 User information ...............................................................................................................................................................................................13

5.1 General ........................................................................................................................................................................................................13

5.2 Special requirements ......................................................................................................................................................................13

5.3 Danger zones .........................................................................................................................................................................................16

6 Marking .......................................................................................................................................................................................................................16

Annex A (normative) Danger zones ....................................................................................................................................................................17

Annex B (normative) Rope arrangement for proper spooling ...............................................................................................19

Annex C (informative) List of significant Hazards ...............................................................................................................................20

Annex D (informative) Aspects of operating traction aid winches ....................................................................................21

Annex E (informative) Example machine safety label (ISO 15817)...................................................................................25

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

Requirements of EU Directive 2006/42/EC aimed to be covered ..................................................................26

Bibliography .............................................................................................................................................................................................................................28

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oSIST prEN ISO 19472-2:2020
ISO/DIS 19472-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 23/SC 15 Forestry machinery (SFS).

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 2020 – All rights reserved
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oSIST prEN ISO 19472-2:2020
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Introduction

Traction aid winches are used with forest machines when operating in sloped terrain and on soils

with limited bearing capacity or poor traction. The winch provides traction assistance to a machine.

The combined tractive effort provided by the machine’s wheels or tracks and the traction aid winch

make it easier to access steep slopes and manage unfavourable soil conditions while maintaining

productivity by avoiding excess uphill driving or driving around a gradient, especially with harvesters,

fellers, forwarders and skidders. Forest floor damages are greatly reduced which leads to a lower

risk of erosion after logging operations. Machine stability is also enhanced and thus general safety of

operation is improved. Traction aid winches offer a possibility for machines to work on slopes which

otherwise would be difficult to negotiate. This makes it simpler to mechanize work in steep terrain

which otherwise would have to be performed manually.

Forestry winches for typical logging such as the ones used for skidding or cable yarding of stems/logs

are designed for a different application than traction aid winches. The control systems, safety features,

and performance measures on forestry winches have been designed for a purpose that is incompatible

with the requirements of traction aid applications. Therefore forestry winches should not be used in

traction aid applications.

Main categories of winches for tractive efforts are shown in Fig I. Further aspects of the design and

operation of traction aid winches can be found in Annex D.
Fig I — Categorization of winches for tractive efforts
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oSIST prEN ISO 19472-2:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 19472-2:2020(E)
Machinery for forestry — Winches — Dimensions,
performance and safety —
Part 2:
Traction aid winches
1 Scope

This International Standard defines dimensions and specifies performance and safety requirements

for traction aid winches used in forestry for assisting supported machines while going uphill and

downhill (pulling and braking). It is applicable to fixed and detachable winches and their components,

connections and communications, which are used with mobile and self-propelled forestry machinery

as defined in ISO 6814 such as harvesters, forwarders, skidders, planting machines, machines for

forest ground preparation and machines for extracting residual waste. It is also applicable to remote

traction aid winch systems which are installed on a position away from the supported machine. It is

not applicable to winches which are not using a controlled rope force while going downhill and winches

used for skidding, hoisting operations on cranes, draglines, high lead logging, rope logging systems

or yarding. This standard is intended to be applied to traction aid systems used on machines, where

without use of these systems the machine would remain stationary on slopes under its independent

control (see Appendix D).

Forestry machines, as defined in ISO 6814 that are used as anchor or supported machines, are not in the

scope of this standard. For guidance refer to EN ISO 11850.
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.

EN 953:2009, Safety of machinery. Guards. General requirements for the design and construction of fixed

and movable guards

ISO 2631-1:1997-05, and AMD 1:2010-07, Mechanical vibration and shock — Evaluation of human exposure

to whole-body vibration — Part 1: General requirements

ISO 3600, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —

Operator's manuals — Content and format

EN ISO 4254-1:2016, Agricultural machinery - Safety - Part 1: General requirements

ISO 4309:2003, Cranes and lifting appliances - Selection of wire ropes - Part 1: General (ISO 16625:2013)

ISO 4309:2012, Cranes — Wire ropes — Care and maintenance, inspection and discard

ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their

components
ISO 6750, Earth moving machinery — Operator’s manual — Content and format

ISO 6814:2009-5, Machinery for forestry - Mobile and self-propelled machinery - Terms, definitions and

classification
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ISO 8084:2003, Machinery for forestry — Operator protective structures — Laboratory tests and

performance requirements

ISO 9612:2009-09, Acoustics — Determination of occupational noise exposure — Engineering method

ISO 10968, Earth-moving machinery — Operator’s controls
EN ISO 11850:2016, Machinery for forestry - General safety requirements

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

reduction (ISO 12100:2010)
EN 12385-1:2009, Steel wire ropes. Safety. Part 1: General requirements

EN 12385-2:2008, Steel wire ropes. Safety. Part 2: Definitions, designation and classification

EN 12385-3:2018, Steel wire ropes — Safety — Part 3: Information for use and maintenance

EN 12385-4:2008, Steel wire ropes. Safety. Part 4: Stranded ropes for general lifting applications

EN 12385-5:2003-03, Steel wire ropes—- Safety — Part 5: Stranded ropes for lifts

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

EN ISO 13411-3:2009, Terminations for steel wire ropes. Safety Part 3: Ferrules and ferrule securing

EN ISO 13411-6:2009, Terminations for steel wire ropes. Safety. Part 6: Asymmetric wedge socket

EN ISO 13411-8:2011, Terminations for steel wire ropes. Safety. Part 8: Swage terminals and swaging

ISO 13732-1, Ergonomics of the thermal environment — Methods for the assessment of human responses to

contact with surfaces — Part 1: Hot surfaces

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

for design (ISO 13849-1:2006)

ISO 13850:2006, (EN 418), Safety of machinery. Emergency stop. Principles for design

ISO 13857:2008, (EN 294), Safety of machinery. Safety distances to prevent hazard zones being reached by

upper and lower limbs

EN 14492-1:2010, Cranes. Power driven winches and hoists. Part 1: Power driven winches

ISO 15077:2008, Tractors and self-propelled machinery for agriculture — Operator controls — Actuating

forces, displacement, location and method of operation

ISO 15817:2012, Earth-moving machinery — Safety requirements for remote operator control systems

ISO 16625:2013, Cranes and hoists — Selection of wire ropes, drums and sheaves

EN 17067:2019, - Forestry machinery - Safety requirements on radio remote controls; German and English

version EN 17067:2019

ISO 19472:2006, Machinery for forestry — Winches — Dimensions, performance and safety

EN IEC 60204-1:2019, Safety of machinery. Electrical equipment of machines. General requirements

EN IEC 60447:2004, Basic and safety principles for man-machine interface, marking and identification -

Actuating principles

EN 61000-6-4, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission standard

for industrial environments (IEC 61000-6-4:2006 + A1: 2010)
2 © ISO 2020 – All rights reserved
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EN IEC 62745:2017, Safety of machinery - General requirements for cableless control systems of machinery

(IEC 44/728/CDV)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
Traction aid

Working method in which a forest machine is using an assisting rope to support the machine’s own

tractive or braking effort by a regulated pulling and/or braking force which is kept constant or

regulated according to the slip or other traction defined parameters of the supported machine while

the supported machine when stopped remains stationary on the slope travelled upon without any

further rope assistance; see Annex D.
3.2
Traction aid winch

A winch normally mounted on the self-propelled forest machine itself or placed separately providing

additional traction and braking force to a forest machine on steep slopes or under unfavourable soil

conditions in a regulated way in accordance with the machine‘s speed or the slip of its drivetrain, which

consists mainly of a rope, a power driven drum or a capstan power transmission and spooling devices

and control devices, attached to the base machine’s frame or installed remotely.
3.3
Rope
Steel wire rope used in traction aid winches complying with EN 12385-5.
3.4
Rope diameter d
Diameter of the steel wire rope used in a traction aid winch
3.5
Service mass

Mass of the supported machine including the operating mass of the supported machine, and if the winch

is mounted onto it, the mass of the winch system including rope and permitted payload.

3.6
Drum core diameter A
Diameter of the rope drum core in millimetres
3.7
Drum rim diameter B
Diameter of the rope drum rim in millimetres
3.8
Drum width C

Distance between the rims of the rope drum, measured in millimetres at the half depth of the flange

minus the width of the rope free space on the drum in millimetres
3.9
Flange depth D

Radial distance from the outer diameter of the rope drum rim to the rope drum core in millimetres

3.10
Safety overhang S

Overhang in millimetres from the outer part of the winch rim or housing, which shall remain free when

storing the entire rope length in order to ensure that the rope remains in the drum

Note 1 to entry: Measures 3.5 to 3.9 shall be used to calculate necessary safety distance on drums such as flanged

pulleys, frames/housings or rope guides.
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3.11
Chain drive

Power transmission system consisting of roller chains, driven and non-driven chain wheels and chain

fastenings
3.12
Rope deflection angle

The angle between the actual running direction of the rope and a line perpendicular to the drum axis

or the groove direction of the drum grooving while they are projected on a plane through the drum axis

and parallel to the incoming direction of the rope
3.13
Power transmission
Two or more connected parts that transmit power
3.14
Maximum speed
Highest possible speed in the intended direction of movement
3.15
Pulling

Working action where the traction aid winch is spooling the rope while transferring a force between

the assisted vehicle and an anchoring point at the body of the winch
3.16
Dynamic Braking (retarder action)

Working action where the traction aid winch is unspooling rope while transferring a force between the

assisted vehicle and an anchoring point or the body of the winch
3.17
Static Braking (holding brake)

Working action where the traction aid winch is set fixed up to a predetermined force which is thus

transferred between the supported machine and the anchoring point in order to hold the supported

machine at a given position while it will allow the traction aid winch to unwind once a given maximum

holding force is exceeded.
3.18
Nominal tensile force

Nominal tensile force/rated pulling force is the minimum breaking force of a rope divided by the

required working coefficient (safe working limit).
3.19
Overload protection

Device which automatically prevents impermissible high loads at the winch during operation

3.20
Rope drive

System of ropes which run on rope drums and via rope pulleys as well as rope fastening parts

3.21
Rope end connector

Device situated at the free end of a winch rope which has direct contact to the rope that enables

connection of the rope to the load, the supported machine, an anchoring point or allows transferring

the rope force onto fastening gear.

Note 1 to entry: The rope end connector is capable of transmitting the rope force between elements (e.g. from the

rope through shackles to an attachment point).
3.22
Rope fastening on the rope drum
All parts with which the rope is fastened on the rope drum
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3.23
Fastening equipment

Parts and devices that form the connection between the anchoring point and the rope or between an

anchoring point and an additional deflection pulley

Note 1 to entry: Note Shackles, loop fastening straps, round slings or rope slings together with shackles are

recognized fastening equipment.
3.24
Fastening gear
Equipment and devices for fastening the load to be pulled to a hauling rope
Note 1 to entry: Note Choker chains, choker ropes are recognized fastening gear
3.25
Deflection pulley

Fastened component of the rope drive, generally installed at a location away from the traction aid winch

system, which allows the rope to deflect angles <= 180 ° from its initial direction

3.26
Guide roller

Fixed component of the rope drive, generally forming part of the traction aid winch system, which

allows the rope to deflect a desired angle from its initial direction
3.27
Pressure roller

Fixed component of the rope drive with the task of ensuring adequate spooling quality

3.28
Installation mode

Operation mode in which the traction aid winch is operated manually for winching and spooling in

order to connect winch, anchoring points and supported machine
3.29
Synchronized mode

Operation mode in which the traction aid winch is operated automatically with either pre-set pulling

and braking forces or other traction relevant parameters and with a speed of the winch which is

regulated according to the forward or reverse speed of the supported machine.
Note 1 to entry: Control is normally effectuated by regulation of the rope force
3.30
Auxiliary mode

Operation mode in which the traction aid winch is operated manually for pulling purposes foreseen by

the manufacturer
3.31
Supported machine

Self-propelled forest machine as defined in ISO 6814 equipped with a fixed or removable traction aid

winch or attached to a remote traction aid winch to which the traction aid winch system transfers a

pulling or a braking force at a rope speed regulated according to the speed of such a forest machine in

order to facilitate its mounting or descending slopes or help to overcome unfavourable soil conditions

3.32
Rope speed

Speed of the rope with reference to the position of the traction aid winch at which the rope is spooled or

unspooled by the traction aid system especially in synchronized mode
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3.33
Working coefficient

The working coefficient shall be determined from the ratio of the minimum breaking force of the rope

and the maximum applied force to the rope (this means active pulling or dynamic braking) with the

maximum applied force resulting from the operation of the force limiter.
3.34
Rated pulling force

Maximum nominal pulling force for which a traction aid winch has been designed by the manufacturer

3.35
Proper spooling

Way of spooling on a winch where the rope windings are situated one next to the other in layers which

cover the whole width of the drum and which does not allow rope from an upper layer to slip down into

a lower layer (see Annex B).
3.36
Attachment point

Connecting point at the supported machine which is designed for attaching the rope of a remote traction

aid winch
3.37
Anchoring point

Fixed point in the area of the upper end of the driving path of a supported machine with sufficient

bearing capacity (e.g. on a tree, on a heavy mobile machine or in the ground) used to attach the rope

of an integrated traction aid winch or the body of a remote traction aid winch to provide sufficient

counter bearing for the arising forces of the rope of the respective traction aid winch

3.38
Sheave

Rotary mounted cylindrical device, usually fitted with grooves around which the winching rope is

wound partially or several times, which is used to deflect the pulling direction of a rope a given angle

3.39
Traction sheave

Sheave connected to a driving shaft around which the winching rope is wound partially or several times

in order to enable the transfer of a pulling or a braking force t
...