ISO 12003-1:2021 Tractors for agriculture and forestry — Roll-over protective structures on narrow tractors —Part 1: Front-mounted ROPS

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INTERNATIONAL STANDARD ISO 12003-1:2021(E)

Tractors for agriculture and forestry — Roll-over protective structures on narrow tractors —

Part 1: Front-mounted ROPS

1 Scope

This document specifies procedures for both the static and dynamic strength testing of roll-over protective structures (ROPS) front-mounted on narrow tractors. It defines the clearance zone and acceptance conditions for rigid or tiltable, front, two-post ROPS, including any associated rear fixtures, and is applicable to tractors so equipped having the following characteristics:

— a ground clearance of not more than 600 mm beneath the lowest points of the front- and rear-axle housings (not considering lower points on the axle differential);

— a fixed or adjustable minimum track width of one of the two axles of less than 1 150 mm;

NOTE It is understood that the axle mounted with the wider tyres is set at a track width of not more than 1 150 mm. Tyre track width is adjustable so that the outer edges of the narrower tyres do not extend beyond the outer edges of the tyres of the other axle. Where the two axles are fitted with rims and tyres of the same size, the fixed or adjustable track width of the two axles is less than 1 150 mm.

— a mass greater than 400 kg but less than 3 500 kg, unballasted, including the ROPS and tyres of the largest size recommended by the manufacturer;

— fitted with roll-over protective structures of the dual-pillar type mounted only in front of the seat index point (SIP) and characterised by a reduced clearance zone attributable to the tractor silhouette.

This document also specifies optional testing procedures for both seat anchorage points and folding efforts of front-mounted ROPS designed to fold.

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 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products

ISO 630-2, Structural steels — Part 2: Technical delivery conditions for structural steels for general purposes

ISO 630-3, Structural steels — Part 3: Technical delivery conditions for fine-grain structural steels

ISO 630-4, Structural steels — Part 4: Technical delivery conditions for high yield strength quenched and tempered structural steel plates and wide flats

ISO 2408, Steel wire ropes — Requirements

ISO 3776-2, Tractors and machinery for agriculture — Seat belts — Part 2: Anchorage strength requirements

ISO 12003-1:2021(E)

ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index point

ISO 12934, Tractors and machinery for agriculture and forestry — Basic types — Vocabulary

ISO 13854:2017, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

ISO 80000-1, Quantities and units — Part 1: General

ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products

1)

ASAE S313, Soil Cone Penetrometer

1)

ASAE EP542, Procedures for Using and Reporting Data Obtained with the Soil Cone Penetrometer

3 Terms a nd definiti ons

For the purposes of this document, the terms and definitions given in ISO 12934 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/o bp

— IEC Electropedia: available at https:// www .electropedia .org/ 3.1

roll-over protective structure

ROPS

framework protecting drivers of agricultural tractors, which minimizes the likelihood of driver injury resulting from accidental overturning during normal field work

Note 1 to entry: The ROPS is characterized by the provision of space for a clearance zone, either inside the envelope of the structure or within a space bounded by a series of straight lines from the outer edges of the structure to any part of the tractor that might come into contact with the ground; it is capable of supporting the tractor in an overturned position.

3.2

front-mounted ROPS

two-post roll-over protective structure (3.1) mounted on the tractor in front of the driver and with a reduced clearance zone

Note 1 to entry: Compare with rear-mounted ROPS described in ISO 12003-2.

3.3

unballasted mass

mass of the tractor in working order with tanks and radiators full, roll-over protective structure (3.1) with cladding and any track equipment or additional front-wheel drive components required for normal use

Note 1 to entry: Not included are the operator, optional ballast weights, additional wheel equipment, special equipment and loads.

[SOURCE: ISO 5700:2013, 3.2]

3.4

maximum permissible mass

m

max

maximum mass of the tractor stated by the manufacturer to be technically permissible and declared on the vehicle’s identification plate and/or in the operator’s handbook

1) American Society of Agricultural Engineers, now known as American Society of Agricultural and Biological Engineers.

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