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BS ISO 12003-1:2021

BS ISO 12003-1:2021

$215.11

Tractors for agriculture and forestry. Roll-over protective structures on narrow tractors – Front-mounted ROPS

Published By Publication Date Number of Pages
BSI 2021 72
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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:

  1. 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);

  2. 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.

  3. 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;

  4. 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.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
9 Introduction
11 1 Scope
2 Normative references
12 3 Terms and definitions
16 4 Symbols
17 5 Test apparatus and equipment
5.1 Apparatus for both dynamic and static testing
5.1.1 Clearance zone framework
5.1.2 Apparatus for crushing tests
18 5.1.3 Rear hard fixture test rig
19 5.2 Apparatus for dynamic testing
5.2.1 Device to strike a blow against the front-mounted ROPS
20 5.2.2 Pendulum supports
5.2.3 Means of lashing the tractor to the ground
21 5.2.4 Wheel beam
5.2.5 Wheel prop
23 5.2.6 Props and lashings for articulated tractors
5.2.7 Tyre pressures and deflection
5.2.8 Device to measure elastic deflection
24 5.3 Apparatus for static testing
25 6 Preparation of tractor and ROPS for testing
26 7 ROPS deflection preliminary tests
7.1 General requirements
7.2 Lateral stability test
27 7.3 Non-continuous rolling test
7.3.1 General
7.3.2 Demonstration of non-continuous rolling behaviour by means of the overturning test
28 7.3.3 Demonstration of non-continuous rolling behaviour by calculation
8 ROPS deflection test procedures
8.1 General requirements
8.2 Test methods
8.3 Test sequence
29 8.4 Rear fixture test procedure
8.5 Dynamic (impact) test procedures for front-mounted ROPS
8.5.1 Rear impact test procedure
30 8.5.2 Front impact test procedure
31 8.5.3 Side impact test procedure
32 8.5.4 Additional impact tests
8.6 Static test procedures for front-mounted ROPS
8.6.1 Test preparation
33 8.6.2 General requirements for horizontal loading test procedures
8.6.3 Rear loading
8.6.4 Front loading
34 8.6.5 Side loading
8.7 Vertical crushing test procedure
8.8 Additional vertical crushing tests
8.9 Observations during testing
8.9.1 Fractures and cracks
8.9.2 Clearance zone
35 8.9.3 Recording permanent deflection
9 Determination of seat index point (SIP), seat location and adjustment for test
9.1 General
9.2 Seat location and adjustment for tests
10 Clearance zone
10.1 General
10.2 Clearance zone for tractors with a non-reversible seat
37 10.3 Clearance zone for tractors with a reversible driving position
38 10.4 Optional seats
11 Tolerances
39 12 Acceptance conditions
12.1 General
12.2 Clearance zone
12.3 Seat anchorage performance
12.4 Folding ROPS performance
12.5 After impact loads
40 12.6 After static horizontal loads
12.7 Additional conditions
43 12.8 Cold weather embrittlement
13 Seatbelt anchorage test procedures
14 Folding ROPS
44 15 Labelling
16 Extension to other models
16.1 Administrative extension
16.2 Technical extension
16.2.1 General
45 16.2.2 Extension of the structural test results to other models of tractors
16.2.3 Extension of the structural test results to modified models of the protective structure
16.2.4 Type extension limits
46 16.2.5 Increase of the declared reference mass
17 Test report
47 Annex A (normative) Requirements for providing resistance to brittle fracture of front-mounted ROPS at a reduced operation temperature
49 Annex B (informative) Folding ROPS test procedures
57 Annex C (normative) Test report for front-mounted ROPS
67 Annex D (normative) Non-continuous rolling test procedure — Calculation method
71 Bibliography

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BS ISO 12003-1:2021
$215.11