ISO 4253:1993
(Main)Agricultural tractors - Operator's seating accommodation - Dimensions
Agricultural tractors - Operator's seating accommodation - Dimensions
Lays down dimensions for the operator's seat and the location of specific controls relative to the seat index point within the seating accommodation on agricultural tractors with a track width greater than 1150 mm. The controls included are the steering-wheel, clutch pedal, brake pedal(s), and throttle pedal. Standardized dimensions and locations will assist the future design of operator's seating accommodation on agricultural tractors.
Tracteurs agricoles — Poste de conduite pour conducteur assis — Dimensions
Kmetijski traktorji - Vozniški sedež - Prilagodljivost - Mere
General Information
- Status
- Published
- Publication Date
- 08-Sep-1993
- Technical Committee
- ISO/TC 23/SC 4 - Tractors
- Drafting Committee
- ISO/TC 23/SC 4 - Tractors
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 05-Aug-2022
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 15-Apr-2008
Overview - ISO 4253:1993 (Agricultural tractors - Operator's seating accommodation - Dimensions)
ISO 4253:1993 specifies dimensional and positional requirements for the operator’s seating accommodation on agricultural tractors with a track width greater than 1 150 mm. The standard defines the Seat Index Point (SIP) as the reference, and gives rules for locating key controls - steering wheel, clutch pedal, brake pedal(s) and throttle/accelerator pedal - relative to the SIP. These standardized dimensions support ergonomic, safe and consistent cab and seat design for tractor manufacturers and equipment designers.
Key topics and technical requirements
- Scope: Applies to seated operator accommodations on agricultural tractors with track width > 1 150 mm.
- Seat Index Point (SIP): All dimensions and control locations are referenced to the SIP (ISO 5353 referenced).
- Seat geometry:
- Inclination of the seat cushion: between 3° and 12° measured per ISO 5353 loading device.
- Preferred adjustable ranges for seat position (longitudinal and vertical) are specified to accommodate different operator postures.
- Control locations:
- Pedal order (left to right): clutch (left), brake(s) (right), accelerator (if present) (right).
- The distance of the accelerator forward of the SIP must not exceed 90% of a key dimension (l1) defined in the standard.
- Measurement points:
- Pedal measurement point: intersection of the longitudinal and transverse median lines of the pedal contact surface.
- Steering-wheel measurement point: intersection of the steering-column axis with the plane of the wheel rim.
- Steering wheel:
- Lateral offset of the steering axis may be up to +50 mm from the SIP longitudinal axis.
- Steering-wheel angle choice depends on operator posture and wheel diameter; allowed angle range 0° to 40°.
- Usability: Seat adjustments (longitudinal and vertical) must be achievable without tools and be independent of each other.
Applications - who uses ISO 4253
- Tractor OEMs and cab designers for consistent, ergonomic layout of seats and controls
- Agricultural equipment ergonomists and human factors engineers
- Safety and compliance teams assessing operator reach and posture
- Component suppliers (seats, pedal boxes, steering systems) for dimensional compatibility
- Test laboratories and regulators evaluating operator accommodations
Related standards
- ISO 5353:1978 - Point of the operator seat (SIP) (referenced)
- ISO 3789 parts (referenced) - Operator control locations and operation for tractors and agricultural machinery
ISO 4253 helps ensure ergonomic, safe and interoperable tractor operator stations by standardizing how the seat and primary controls are dimensioned and positioned relative to the SIP. Keywords: ISO 4253, agricultural tractors, operator seating, seat index point, SIP, ergonomics, tractor controls, steering wheel, pedals, dimensions.
ISO 4253:1993 - Agricultural tractors -- Operator's seating accommodation -- Dimensions
ISO 4253:1993 - Tracteurs agricoles -- Poste de conduite pour conducteur assis -- Dimensions
Frequently Asked Questions
ISO 4253:1993 is a standard published by the International Organization for Standardization (ISO). Its full title is "Agricultural tractors - Operator's seating accommodation - Dimensions". This standard covers: Lays down dimensions for the operator's seat and the location of specific controls relative to the seat index point within the seating accommodation on agricultural tractors with a track width greater than 1150 mm. The controls included are the steering-wheel, clutch pedal, brake pedal(s), and throttle pedal. Standardized dimensions and locations will assist the future design of operator's seating accommodation on agricultural tractors.
Lays down dimensions for the operator's seat and the location of specific controls relative to the seat index point within the seating accommodation on agricultural tractors with a track width greater than 1150 mm. The controls included are the steering-wheel, clutch pedal, brake pedal(s), and throttle pedal. Standardized dimensions and locations will assist the future design of operator's seating accommodation on agricultural tractors.
ISO 4253:1993 is classified under the following ICS (International Classification for Standards) categories: 65.060.10 - Agricultural tractors and trailed vehicles. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 4253:1993 has the following relationships with other standards: It is inter standard links to ISO 4253:1977. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 4253:1993 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kmetijski traktorji - Vozniški sedež - Prilagodljivost - MereTracteurs agricoles -- Poste de conduite pour conducteur assis -- DimensionsAgricultural tractors -- Operator's seating accommodation -- Dimensions65.060.10Kmetijski traktorji in prikoliceAgricultural tractors and trailed vehiclesICS:Ta slovenski standard je istoveten z:ISO 4253:1993SIST ISO 4253:1995en01-april-1995SIST ISO 4253:1995SLOVENSKI
STANDARD
INTERNATIONAL STANDARD ISO 4253 Second edition 1993-09-15 Agricultural tractors - Operator% seating accommodation - Dimensions Tracteurs agricoles - Poste de conduite pour conducteur assis - Dimensions Reference number ISO 4253:1993(E) SIST ISO 4253:1995
INTERNATIONAL STANDARD ISO 4253:1993(E) Agricultural tractors - Operator’s seating accommodation - Dimensions 1 Scope This International Standard lays down dimensions for the Operators seat and the location of specific con- trols relative to the Seat Index Point (SIP) within the seating accommodation on agricultural tractors with a track width greater than 1 150 mm. The controls included are the steering-wheel, clutch Pedal, brake Pedal(s), and throttle Pedal. Standardized dimensions and locations will assist the future design of Operators seating accommodation on agricultural tractors. 2 Normative reference The following Standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the edition indicated was valid. All Standards are subject to revision, and Parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent edition of the Standard indicated below. Mem- bers of IEC and ISO maintain registers of currently valid International Standards. ISO 5353: 1978, Earth-moving machinery, and tractors and machinety for agriculture and forestry - Seat index poin t. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 length of seat in front of SIP: Horizontal dis- tance parallel to the longitudinal plane of the vehicle, measured from the front edge of the seat cushion (offset 150 mm on either side of the longitudinal centreline) to the vertical transverse plane containing the seat index Point. 3.2 width of seat cushion: Width measured along the transverse plane through the seat index Point. 3.3 Pedal(s): Any or all of the clutch, brake and throttle Pedals. 4 Adjustment of Pedals and steering-wheel The Pedals shall be adjusted in accordance wi
...
INTERNATIONAL
ISO
STANDARD
Second edition
1993-09-15
Agricultural tractors - Operator% seating
accommodation - Dimensions
Tracteurs agricoles - Poste de conduite pour conducteur assis -
Dimensions
Reference number
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. Esch 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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 4253 was prepared by Technical Committee
lSO/TC 23, Trattors and machinery for agriculture and forestry, Sub-
Committee SC 3, Safety and comfort of the Operator.
This second edition cancels and replaces the first edition
(ISO 4253:1977), of which it constitutes a full revision and extension.
0 ISO 1993
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
INTERNATIONAL STANDARD ISO 4253:1993(E)
Agricultural tractors - Operator’s seating
accommodation - Dimensions
centreline) to the vertical transverse plane containing
1 Scope
the seat index Point.
This International Standard lays down dimensions for
3.2 width of seat cushion: Width measured along
the Operators seat and the location of specific con-
the transverse plane through the seat index Point.
trols relative to the Seat Index Point (SIP) within the
seating accommodation on agricultural tractors with
3.3 Pedal(s): Any or all of the clutch, brake and
a track width greater than 1 150 mm. The controls
throttle Pedals.
included are the steering-wheel, clutch Pedal, brake
Pedal(s), and throttle Pedal.
Standardized dimensions and locations will assist the
4 Adjustment of Pedals and
future design of Operators seating accommodation
steering-wheel
on agricultural tractors.
The Pedals shall be adjusted in accordance with the
manufacturer’s instructions. Measurements of the
Pedal Position shall be made before any forte is ap-
2 Normative reference
plied to move the Pedals.
The following Standard contains provisions which,
The measurement Point of a Pedal is where the
through reference in this text, constitute provisions
longitudinal and transverse centrelines of the Pedal
of this International Standard. At the time of publi-
tread surface intersect.
cation, the edition indicated was valid. All Standards
are subject to revision, and Parties to agreements The measurement Point for the steering-wheel is the
based on this International Standard are encouraged Point where the centreline through the steering-wheel
to investigate the possibility of applying the most re- axis intersects with the upper plane of the steering-
cent edition of the Standard indicated below. Mem- wheel rim.
bers of IEC and ISO maintain registers of currently
valid International Standards.
5 Lateral arrangement of Pedals
ISO 5353: 1978, Earth-moving machinery, and tractors
and machinety for agriculture and forestry - Seat
The Pedals shall be placed in the following Order from
index poin t.
the left-hand side to the right-hand side: clutch (oper-
ated by the left foot), brake(s) (operated by the right
foot) and, if installed, the foot throttle (operated by the
rig ht foot).
3 Definitions
NOTE 1 This arrangement is in accordance with the rec-
ommendations in ISO 3789-1:
...
NORME Iso
INTERNATIONALE
Deuxième édition
1993-09-I 5
Tracteurs agricoles - Poste de conduite
pour conducteur assis - Dimensions
Agricultural tractors - Opera tor ‘s sea ting accommodation - Dimensions
Numéro de référence
Avant-propos
L’ISO (Organisation internationale de normalisation) est une federation
mondiale d’organismes nationaux de normalisation (comités membres de
I’ISO). L’élaboration des Normes internationales est en général confiee aux
comités techniques de I’ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comité technique crée a cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec 1’60 participent également aux travaux. L’ISO colla-
bore étroitement avec la Commission électrotechnique internationale (CEI)
en ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l’approbation de 75 % au moins des co-
mités membres votants.
La Norme internationale ISO 4253 a été élaborée par le comité technique
lSO/TC 23, Tracteurs et matériels agricoles et forestiers, sous-comité SC
3, Sécurité et confort de l’opérateur.
Cette deuxiéme édition annule et remplace la première édition
(ISO 4253:1977), dont elle constitue une révision compléte et une exten-
sion.
0 60 1993
Droits de reproduction réservés. Aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou m écanique,
y compris la photocopie et les microfilms, sa ns l’accord écrit de l’éditeur.
Organisation internationale de normalisation
Case Postale 56 l CH-l 211 Genève 20 l Suisse
Imprimé en Suisse
II
NORME INTERNATIONALE ISO 4253:1993(F)
- Poste de conduite pour
Tracteurs agricoles
- Dimensions
conducteur assis
de 150 mm de chaque côté de l’axe longitudinal) au
1 Domaine d’application
plan transversal contenant le point repére du siège.
La présente Norme internationale définit les dimen-
3.2 largeur du coussin du siège: Largeur mesurée
sions du siège du conducteur et l’emplacement des
dans le plan transversal passant par le point repère
commandes spécifiques par rapport au point repère
du siège.
du siège (SIP) a l’intérieur du poste de conduite pour
conducteur assis des tracteurs agricoles ayant une
3.3 pédale(s): Pédales d’embrayage, de frein et/ou
largeur de voie supérieure à 1 150 mm. Ces com-
d’accélérateur.
mandes sont le volant de direction, la pédale d’em-
brayage, la (les) pédale(s) de frein et la pédale
d’accélérateur.
4 Réglage des pédales et du volant de
Les emplacements et dimensions normalisés ser-
direction
viront de guide pour les futurs projets de conception
des postes de conduite pour conducteurs assis des
Les pédales doivent être réglées conformément aux
tracteurs agricoles.
instructions du fabricant. Les mesurages de la po-
sition d’une pédale doivent être effectués avant d’ap-
pliquer une force quelconque destinée a mettre la
2 Référence normative
pédale en mouvement.
La norme suivante contient des dispositions qui, par
Le point de mesure d’une pédale se trouve a l’inter-
suite de la référence qui en est faite, constituent des
section des lignes médianes longitudinale et trans-
dispositions valables pour la présente Norme interna-
versale de la surface de contact de la pédale.
tionale. Au moment de la publication, l’édition indi-
Le point de mesure du volant de direction est le point
quée était en vigueur. Toute norme est sujette a
d’intersection de l’axe de l’arbre du volant de direction
révision et les parties prenantes des accords fondés
sur la présente Norme internationale sont invitees a avec le plan supérieur de la jante du volant.
rechercher la possibilité d’appliquer l’édition la plus
récente de la norme indiquée ci-après. Les membres
de la CEI et de I’ISO possèdent le registre des Nor-
5 Disposition latérale des pédales
mes internationales en vigueur à un moment donné.
Les pédales doivent être placées dans l’ordre suivant,
ISO 5353:1978, Engins de terrassement et tracteurs
de gauche à droite: embrayage (actionné avec le pied
et matériels agricoles et forestiers - Point repére du
gauche), frein(s) [actionné(s) avec le pied droit] et,
siège.
accélérateur (s’il existe) (actionné avec le pied droit).
NOTE 1 Cette disposition est conforme aux recomman-
dations de 1’60 3789-l : 1982, Tracteurs, matériels agricoles
3 Définitions
et forestiers, matériel à moteur pour jardins et pelouses -
Emplacement et
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