ISO 12003-2:2021 pdf download – Tractors for agriculture andforestry — Roll-over protective structures on narrow tractors —Part 2: Rear-mounted ROPS
ISO 12003-2:2021 pdf download – Tractors for agriculture andforestry — Roll-over protective structures on narrow tractors —Part 2: Rear-mounted ROPS.
6 Preparation of tractor and ROPS for testing
6.1 The protective structure may be manufactured either by the tractor manufacturer or by an independent firm. In either case, a test Is only valid for the model of tractor on which It Is carried out.
6.2 The protective structure shall be retested for each model of tractor to which it is to be fitted. However, the entity may certify that the strength tests are also valid for tractor models derived from the original model by modifications to the engine, transmission and steering and front suspension. More than one protective structure may be tested for any one model of tractor
6.3 The rear-mounted ROPS shall be manufactured to production specifications and shall be fitted to the appropriate tractor model chassis in accordance with the manufacturer’s declared attachment method to form the assembly.
NOTE A complete tractor is not required for the static strength test; however, the protective structure and part of the tractor to which it is attached represent an operating installation; hereinafter referred to as the assembly.
6.4 This assembly shall be secured to the bedplate so that the members connecting the assembly and the bvdplate do not deflect significantly In relation to the ROPS under loading. The assembly shall not receive any support under loading other than that due to the initial attachment.
6.5 A track width setting for the rear wheels, if present, shall be chosen such that there is no interference with the ROPS during testing.
6.6 The assembly shall be supported and secured or modified so that all the test energy is absorbed by the roll•over protective structure and Its attachment to the tractor rigid components.
6.7 Deflection of the chassis integral components Is permissible during the ROPS test Any members that absorb energy during the ROPS test should be noted in the test report.
6.8 All windows, panels and removable non-structural fittings shall be removed so that they do not contribute to the strength of the ROPS.
In cases where it is possible to lix doors and windows open or remove them during work, they shall be either removed or fixed open for the test, so that they do not add to the strength of the ROPS. It shall be noted, whether, in this position, they would create a hazard for the driver in the event of overturning,
6.9 Any component of the tractor contributing to the strength of the protective structure, such as mudguards, which has been reinforced by the manufacturer, shall be described and its measurements given In the test report.
6.10 Where a tandem” tractor (e.g. articulated tractor) is concerned, the mass of the standard version of that part to which the ROPS is fitted shall he used.
6.11 The ROPS shall be instrumented with the necessary equipment to obtain the required force deflection data.
6.12 Components which may create a hazard in the clearance zone shall also be fitted on the tractor (or the assembly) SC) that they may he shown to fulfil requirements of the acceptance conditions of Clause 11 have been fulfilled.
7 ROPS deflection test procedures
CAUTION — Take adequate protection to protect personnel during tests. Some of the tests specified in this document involve the use of processes which can lead to a hazardous situation.
7.1 General requirements
7.1.1 If. during any test, any part of the tractor restraining equipment breaks or moves, the test shall be restarted.
7.1.2 Nc) repairs or adjustments to the tractor or rear-mounted ROPS may he carried out during the tests.
7.1.3 The tractor gear box shall be in neutral and the brakes otfduring testing.
7.1.4 If the tractor is litted with a suspension system between the tractor body and the wheels, it shall be blocked during testing.
7.1.5 The side chosen for application of the first impact (dynamic test) or the first load (static test) on the rear of the structure shall be the one that will result in the application of the series of impacts or loads under the most unlavourable conditions for the rear-mounted ROPS, The side impact or load and rear impact or load-shall be-applied on both sides of the longitudinal median plane of the rear-mounted ROPS. The front impact or load shall be on the same side of the longitudinal medbn plane of the rear- mounted ROPS as the side impact or load.