1、BRITISH STANDARD BS 5731:1991 ISO 8935:1990 Specification for Mountings and apertures for external equipment controls on agricultural and forestry tractorsBS5731:1991 This British Standard, having been prepared under the directionof the Agricultural Machinery and Implements Standards Policy Committe
2、e, waspublished under the authorityof the Standards Boardand comes into effect on 31May 1991 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference AGE/6 Draft for comment 88/74239 DC ISBN 0 580 19532 5 Committees responsible for this British Standard The p
3、reparation of this British Standard was entrusted by the Agricultural Machinery and Implements Standards Policy Committee (AGE/-) to Technical Committee AGE/6, upon which the following bodies were represented: AFRC Institute of Engineering Research Agricultural and Allied Workers National Trade Grou
4、p Agricultural Engineers Association British Agricultural and Garden Machinery Association Ltd. County Surveyors Society Department of Trade and Industry (Vehicle Division) Forestry Commission Health and Safety Executive Home Timber Merchants Association of Scotland Local Authority Organizations Min
5、istry of Agriculture, Fisheries and Food National Farmers Union Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No. Date CommentsBS5731:1991 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative re
6、ferences 1 3 Mounting points 1 4 Control clearance 1 5 Apertures 1 Figure 1 Mounting holes and fixture 2 Figure 2 Bracket: alternative fixture 3 Figure 3 Adaptor strip: alternative fixture 4 Figure 4 Location and dimensions of triangular aperture for rear opening window viewed from cab exterior 5 Fi
7、gure 5 Rectangular aperture for use in non-glass surfaces 6 Publication(s) referred to Inside back coverBS5731:1991 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Agricultural Machinery and Implements Standards Policy Committee. It is identical wi
8、th ISO8935:1990 “Tractors for agriculture and forestry Mountings and apertures for external equipment controls” prepared by Technical Committee ISO/TC23, Tractors and machinery for agriculture and forestry, of the International Organization for Standardization (ISO). It is a revision of BS5731:1979
9、intended to harmonize requirements for mountings and apertures for external equipment controls with those of the current International Standard. It supersedes BS5731-1:1979 which is withdrawn. BS5731-2:1979 was withdrawn in1989. The Technical Committee has reviewed the provisions of ISO3463 to which
10、 reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard to ISO3463 is BS4063 “Specification for requirements and testing of protective cabs and frames for agricultural wheeled tractors”. A British Standard does no
11、t purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Stand
12、ard ISO 261:1973 BS 3643 ISO metric screw threads Part 1:1981 Principles and basic data (Technically equivalent) ISO 5700:1989 BS 5947 aMethod of test for static loading for protective cabs and frames for agricultural wheeled tractors, including acceptance conditions (Identical) a In preparation. Su
13、mmary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside fron
14、t cover.BS5731:1991 BSI 12-1999 1 1 Scope This International Standard specifies requirements to allow mounting of additional controls and instrumentation used for remote operation of supplementary machinery and equipment on tractors for agriculture and forestry, and provision of an electrical power-
15、point adjacent to the mounting; it also lays down requirements for an aperture through which the control cable or hose enters the tractor cab. The means of remote control interconnection include mechanical cable, electrical conductor and low-pressure pneumatic or hydraulic 1)hose. 2 Normative refere
16、nces The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this InternationalStan
17、dard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 261:1973, ISO general purpose metric screw threads General plan. ISO 3463:1989, Agricult
18、ural and forestry wheeled tractors Protective structures Dynamic test method and acceptance conditions. ISO 5700:1989, Agricultural and forestry wheeled tractors Protective structures Static test method and acceptance conditions. 3 Mounting points Mounting holes as specified in3.1 and3.2 shall be pr
19、ovided as the minimum requirement. If a bracket to assist interchangeability is part of the manufacturers specification for the tractor cab or implement, then the bracket shall be mounted using the holes specified in3.1 and3.2. Examples of the method of mounting are shown inFigure 1,Figure 2 andFigu
20、re 3. To meet these requirements, only mounting points specified by the manufacturer shall be used. The cab/tractor manufacturer shall establish the mounting point specification and location when testing the structure in accordance with ISO3463 or ISO5700. 3.1 Size and layout At least one pair of ho
21、les, 120mm 0,5mm apart, shall be provided depending on cab structure and layout. The holes shall be on an approximately vertical surface, and approximately aligned either vertically or horizontally. The existing practice of using holes150mm apart and horizontal shall be allowed for on the mounting b
22、racket by providing a third hole (seeFigure 1); this150mm dimension shall not be used for new cab designs. If the mounting points go into box sections, they shall be either threaded to sizeM10 in accordance with ISO261, or allowM10 thread inserts to be used. 3.2 Location Primarily the mounting point
23、s shall be on the right side of the drivers seat in the main driving direction, but duplication should be considered to the drivers left, for left-handed drivers or tractors being used in reverse. The holes shall be so placed that the remote controls are within normal reach of the operator. This Int
24、ernational Standard does not preclude additional holes at positions approved by the cab/tractor manufacturer to facilitate use of controls operated with the body partly turned (controls positioned behind the driver position) or controls and instrumentation mounted ahead of the driver. Any mounting h
25、oles when unused shall be plugged to maintain the intended cab noise insulation and environment. The electric power-point shall be adjacent to these mounting points. 4 Control clearance Consideration shall be given, when locating the mounting holes, to ensuring that the supplementary controls can be
26、 mounted in a practicable manner without interference from the existing tractor/cab layout. 5 Apertures At least one aperture shall be provided on the cab rear surface. The size, shape and location of the aperture shall comply with eitherFigure 4 orFigure 5. Steps shall be taken to seal the aperture
27、 when it has cables or hoses passing through it, to reduce dust and/or chemicals 2)and noise 2)getting in, and to maintain cabin pressurization when appropriate. Cables and hoses shall be guided outside the cab if the aperture is positioned significantly off the tractor longitudinal centreline to av
28、oid ruptures when turning left or right with trailed equipment. 1) Attention is drawn to restrictions on use of hydraulic hoses within the cab by individual national legislation. 2) Reference should be made to national legislation concerning these aspects.BS5731:1991 2 BSI 12-1999 NOTE 1Drawings are
29、 given to illustrate dimensions only, and do not specify a definitive shape. NOTE 2Tolerances shall be as follows: plug dimensions: 0,2 slot dimensions: other: 1 NOTE 3A method of clamping is required to secure the plug in the slot. NOTE 4The alternative vertical configuration is shown by the dashed
30、 line. Figure 1 Mounting holes and fixture +1 0BS5731:1991 BSI 12-1999 3 NOTE 1Drawings are given to illustrate dimensions only, and do not specify a definitive shape. NOTE 2Tolerances shall be as follows: mm in Imperial dimensions to 1 decimal place: 1,52 (0,06) Imperial dimensions to 2 decimal pla
31、ces: 0,76 (0,03) Imperial dimensions to 3 decimal places: 0,25 (0,01) NOTE 3This bracket requires an adaptor mounting strip to retain hole centres120mm 0,5mm apart, either horizontally or vertically. The method of attaching the bracket to the adaptor strip is optional. (See3.1.) Figure 2 Bracket: al
32、ternative fixtureBS5731:1991 4 BSI 12-1999 NOTEDrawings are given to illustrate dimensions only, and do not specify a definitive shape. Figure 3 Adaptor strip: alternative fixtureBS5731:1991 BSI 12-1999 5 NOTE 1Drawings are given to illustrate dimensions only, and do not specify a definitive shape.
33、NOTE 2Aperture may be duplicated in lower left corner of window. Figure 4 Location and dimensions of triangular aperture for rear opening window viewed from cab exteriorBS5731:1991 6 BSI 12-1999 NOTEDrawings are given to illustrate dimensions only, and do not specify a definitive shape. Figure 5 Rec
34、tangular aperture for use in non-glass surfacesBS5731:1991 BSI 12-1999 Publication(s) referred to See national foreword.BS 5731:1991 ISO 8935:1990 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards.
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