1、BRITISH STANDARD BS 6913-5: 1990 Operation and maintenance of earth-moving machinery Part 5: Specification for diagnostic portsBS6913-5:1990 This British Standard, having been prepared under the directionof the Road EngineeringStandards Policy Committee, was published underthe authority of the Board
2、ofBSI and comes intoeffecton 31October1990 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference RDB/21 Draft for comment 87/12992 DC ISBN 0 580 18599 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted
3、 by the Road Engineering Standards Policy Committee (RDB/-) to Technical Committee RDB/21, upon which the following bodies were represented: AFRC Institute of Engineering Research Associated Offices Technical Committee British Coal Corporation Construction Industry Training Board Construction Plant-
4、hire association Federation of Civil Engineering Contractors Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive Institution of Civil Engineers Institution of Highways and Transportation Ministry of Defence Amendments issued since publication Amd. No. Date of
5、 issue CommentsBS6913-5:1990 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Size and type of port 1 4 Application guidelines 1 Publications referred to Inside back coverBS6913-5:1990 ii BSI 09-1999 Foreword This Part of BS6913 h
6、as been prepared under the direction of the Road Engineering Standards Policy Committee. It is based on ISO8925:1989 “Earth-moving machinery Diagnostic ports” published by the International Organization for Standardization (ISO). The United Kingdom disapproved of the port size specified in ISO6149:1
7、980 “Fluid power systems and components Metric ports Dimensions and design”. The port size preferred in the United Kingdom is G1/2 thread in accordance with Table3 of BS4368-3:1974 “Compression couplings for tubes, Part 3 Specification for light series couplings (metric)” see 3.1. BS 4368-3:1974 is
8、related to ISO1179, “Pipe connections, threaded to ISO 228-1 for plain end steel and other metal tubes in industrial applications”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Com
9、pliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard ISO 2860:1983 BS 6112:1983 Recommendations for minimum access dimensions for earth-moving machinery (Identical) ISO 4510-1:1987 BS 6913 Op
10、eration and maintenance of earth-moving machinery Part 1:1989 Guide to common maintenance and adjustment service tools (Identical) ISO 6165:1987 BS 6914 Terminology (including definitions of dimensions and symbols) for earth-moving machinery Part 1:1988 Glossary of terms for basic types of earth-mov
11、ing machinery (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, 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 a
12、mendment table on the inside front cover.BS6913-5:1990 BSI 09-1999 1 1 Scope This Part of BS6913 defines the sizes, types and accessibility of diagnostic ports for use in measuring fluid temperature, pressure and flow, and to obtain fluid samples. It also sets out the requirements for accessibility
13、to the port. It applies to earth-moving machinery as defined in ISO6165, and gives general guidelines for diagnostic port use. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication,
14、the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard 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
15、 International Standards. ISO 2860:1983, Earth-moving machinery Minimum access dimensions. ISO 4510-1:1987, Earth-moving machinery Service tools Part 1: Common maintenance and adjustment tools. ISO 6165:1987, Earth-moving machinery Basic types Vocabulary. 3 Size and type of port 3.1 Temperature, pre
16、ssure and sampling ports The port size for measuring temperature and pressure, and to obtain fluid samples shall be a G1/2 thread in accordance with Table3 of BS4368-3:1974, into which is inserted a tube reduced at its other end to8mm outside diameter when fluid samples are to be extracted. 3.2 Flow
17、 measurement ports Flow measurement ports shall be adequate for the flow to be measured. Generally, sizes below25mm tube should be as specified in3.1 and sizes equal to and above25mm should have either threaded or flanged port faces. 4 Application guidelines 4.1 Number and location of diagnostic por
18、ts The number and location of diagnostic port checking points shall be determined by the manufacturer and shall be commensurate with the complexity of the system being checked and cost effectiveness. The preferred location of diagnostic ports is in the component; however, they should be readily and
19、safely accessible which might often require them to be located in a connecting line. The ports should be so located in the fluid stream as to minimize any conditions which could cause inaccuracies in readings: for fluid sampling, the ports should be located in a turbulent flow section of the system.
20、 The ports shall be fitted with devices to prevent loss of fluid during connecting and disconnecting of diagnostic measuring instruments. The ports shall also be located so that the fluid is not contaminated from the surface of the machine when connecting the measuring instruments or during fluid sa
21、mpling. 4.2 Accessibility 4.2.1 Test ports shall be accessible with common tools, limited to those specified in ISO4510-1, without the removal of any component other than sealing caps, access panels and/or plates. 4.2.2 A free access area of75mm radius around the centre-line of the port and200mm fro
22、m the port surface shall be provided. Access to the port shall be as specified in ISO2860.2 blankBS6913-5:1990 BSI 09-1999 Publications referred to See foreword.BS 6913-5: 1990 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible fo
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