1、 National Standard of CanadaCAN/CSA-M3450-03International Standard ISO 3450:1996 (third edition, 1996-04-01) has been adopted with Canadian deviations(MOD) as CSA Standard CAN/CSA-M3450-03, which has been approved as a National Standard of Canada by theStandards Council of Canada.ISBN 1-55397-076-4
2、March 2003The Canadian Standards Association (CSA), The Standards Council of Canada is theunder whose auspices this National Standard has been coordinating body of the National Standards system, produced, was chartered in 1919 and accredited by a federation of independent, autonomousthe Standards Co
3、uncil of Canada to the National organizations working towards the furtherStandards system in 1973. It is a not-for-profit, development and improvement of voluntarynonstatutory, voluntary membership association standardization in the national interest.engaged in standards development and certificatio
4、n The principal objects of the Council are to foster activities. and promote voluntary standardization as a means CSA standards reflect a national consensus of of advancing the national economy, benefiting theproducers and users including manufacturers, health, safety, and welfare of the public, ass
5、isting consumers, retailers, unions and professional and protecting the consumer, facilitating domestic organizations, and governmental agencies. The and international trade, and furthering internationalstandards are used widely by industry and commerce cooperation in the field of standards.and ofte
6、n adopted by municipal, provincial, and A National Standard of Canada is a standard whichfederal governments in their regulations, particularly in has been approved by the Standards Council ofthe fields of health, safety, building and construction, Canada and one which reflects a reasonableand the e
7、nvironment. agreement among the views of a number of capableIndividuals, companies, and associations across individuals whose collective interests provide to theCanada indicate their support for CSAs standards greatest practicable extent a balance ofdevelopment by volunteering their time and skills
8、to representation of producers, users, consumers, andCSA Committee work and supporting the Associations others with relevant interests, as may be appropriateobjectives through sustaining memberships. The more to the subject in hand. It normally is a standardthan 7000 committee volunteers and the 200
9、0 which is capable of making a significant and timelysustaining memberships together form CSAs total contribution to the national interest.membership from which its Directors are chosen. Approval of a standard as a National Standard ofSustaining memberships represent a major source of Canada indicat
10、es that a standard conforms to theincome for CSAs standards development activities. criteria and procedures established by the StandardsThe Association offers certification and testing Council of Canada. Approval does not refer to theservices in support of and as an extension to its technical conten
11、t of the standard; this remains thestandards development activities. To ensure the continuing responsibility of the accreditedintegrity of its certification process, the Association standards-development organization.regularly and continually audits and inspects products Those who have a need to app
12、ly standards arethat bear the CSA Mark. encouraged to use National Standards of CanadaIn addition to its head office and laboratory complex whenever practicable. These standards are subject in Toronto, CSA has regional branch offices in major to periodic review; therefore, users are cautioned centre
13、s across Canada and inspection and testing to obtain the latest edition from the organizationagencies in eight countries. Since 1919, the preparing the standard.Association has developed the necessary expertise to The responsibility for approving National Standards meet its corporate mission: CSA is
14、 an independent of Canada rests with theservice organization whose mission is to provide an Standards Council of Canadaopen and effective forum for activities facilitating the 270 Albert Street, Suite 200exchange of goods and services through the use of Ottawa, Ontario, K1P 6N7standards, certificati
15、on and related services to meet Canadanational and international needs.For further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaCette Norme nationale du Canada est offerte en anglais et en franais.Although the inten
16、ded primary application of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationStandards Update ServiceCAN/CSA-M3450-03March 2003Title
17、: Braking systems of rubber-tired machines Performance requirements and test procedurePagination: 12 pages (CSA/1, CSA/2, i, ii, and 8 text)To register for e-mail notification about any updates to this publicationgo to shop.csa.caclick on CSA Update ServiceThe List ID that you will need to register
18、for updates to this publication is 2014389.If you require assistance, please e-mail techsupportcsagroup.org or call 416-747-2233.Visit CSA Groups policy on privacy at csagroup.org/legal to find out how we protect your personal information.Blank pageBraking systems of rubber-tired machines CAN/CSA-M3
19、450-03 Performance requirements and test procedureMarch 2003 Canadian Standards Association CSA/1CAN/CSA-M3450-03Braking systems of rubber-tiredmachines Performancerequirements and test procedureCSA PrefaceThis is the second edition of CAN/CSA-M3450, Braking systems of rubber-tired machines Performa
20、ncerequirements and test procedure, which is an adoption, with Canadian deviations, of ISO (InternationalOrganization for Standardization) Standard 3450:1996, Earth-moving machinery Braking systems ofrubber-tyred machines Systems and performance requirements and test procedures (third edition,1996-0
21、4-01). It supersedes the previous edition published in 1992 under the title Braking Systems Performance Requirements and Test Procedures Wheeled Machines (adopted ISO 3450-1985).This Standard presents in full and without any changes the technical requirements of ISO Standard 3450,developed by Techni
22、cal Committee ISO/TC 127 on earth-moving machinery (EMM), in an effort to help setcriteria for the uniform assessment of machines traded on a worldwide basis. The Canadian adoption ispublished under a different title, however, to reflect the intended application of this Standard. In addition tovario
23、us EMMs, it is also considered to be applicable to forestry machines (FMs) such as front-end loaders,delimbers, and slashers. It is not considered to be applicable to wheeled skidders, forwarders, feller-bunchers,or similar crawler-type machines; the braking performance of these machines is covered
24、by appropriateSAE standards.This Standard was reviewed for Canadian adoption by the CSA Technical Committee on Mobile ForestryMachines, under the jurisdiction of the Strategic Steering Committee on Occupational Health and Safety,and has been formally approved by the Technical Committee. A list of th
25、e members of the TechnicalCommittee is available upon request. This Standard has been approved as a National Standard of Canada bythe Standards Council of Canada.March 2003 Canadian Standards Association 2003All rights reserved. No part of this publication may be reproduced in any form whatsoever wi
26、thout the prior permission of thepublisher. ISO material is reprinted with permission. Where the words “this International Standard” appear in the text, theyshould be interpreted as “this National Standard of Canada”. Inquiries regarding this National Standard of Canada should be addressed to Canadi
27、an Standards Association 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044www.csa.caBraking systems of rubber-tired machines CAN/CSA-M3450-03 Performance requirements and test procedureCSA/2 Canadian Standards Association March 2003Canadian DeviationsRepla
28、ce the title of this Standard with the followingBraking systems of rubber-tired machines Performance requirements and test procedureINTERNATIONAL STANDARD IS0 3450 Third edition 1996-04-o 1 Earth-moving machinery - Braking systems of rubber-tyred machines - Systems and performance requirements and t
29、est procedures Engins de terrassemen t - Dispositifs de freinage des engins sur roues kquip V is the velocity of the machine immediately prior to the brake control being activated, in metres per second; is the stopping distance, in metres. 3.7 burnish: Procedure to condition the frictional surfaces
30、of the machine brake(s). 3.8 brake system pressure: Fluid pressure available to the brake control. 3.9 brake application measured at the brake. pressure: Fluid pressure 3.10 modulated braking: Capability to continuously and progressively increase and decrease the braking force by operation of the br
31、ake control. 3.11 test course: Surface upon which the test is carried out. (See 6.2.) 3.12 cold brakes: Expression designating brakes where the brakes have not been actuated in the previous 1 h, except in accordance with 6.9; or the brakes have been cooled to 100 “C or less when measured on the brak
32、e disc or on the out- side of the brake drum; or in the case of totally enclosed brakes, including oil-immersed brakes, the temperature measured on the outside of the housing closest to the brake is below 50 “C or within the manufacturers specifications. 3.13 chine maximum machine level surface spee
33、d: Ma- speed determined in accordance with IS0 6014, or equivalent. 4 Instrument accuracy The instruments used to carry out the required measurements shall conform to conditions of IS0 9248. 5 General requirements The following requirements for brake systems apply to all machines given in clause 1.
34、5.1 Required brake systems The machine shall have the following brake systems: a) a service brake system; b) a secondary brake system; d a parking brake system. No brake system shall contain a disconnect such as a clutch or shiftable gear-box which allows the brake(s) to be disabled. A power source
35、disconnect designed for cold weather starting which also disables a brake system shall re- quire application of the parking brake prior to discon- nection. 2 0 IS0 IS0 3450: 1996(E) 5.2 Common components Brake systems may use common components. How- ever, a failure of any single component other than
36、 a tyre, or a failure of any single common component, shall not reduce the effectiveness of the machines stopping capability to less than the secondary per- formance defined in 5.4, and table 2, 3 or 4, as appli- cable, with one exception: a common control (lever, pedal, switch, etc.) may be used to
37、 actuate combined service and secondary brake systems provided that another dynamic braking capability is provided that will stop the machine within 120 % of the dynamic stopping distance shown for secondary brakes in ta- ble 2, 3 or 4, as applicable. This braking capability may be applied automatic
38、ally and without modulation. 5.3 Service brake system 5.3.1 All machines shall meet the service brake per- formance requirements of 7.5, 7.6 or 7.7 as appli- cable. If other systems are provided with power from the service brake system, any failure in these systems shall be considered to be the same
39、 as a failure in the service brake system. 5.3.2 All machines shall have brakes of equal nom- inal capacity rating applicable to each wheel of at least one axle. Machines with semi-trailed units shall have brakes applicable to at least one axle of the towing machine and one axle of the semi-trailed
40、units. 5.3.3 The service brake system shall be modulated as defined in 3.10. 5.4 Secondary brake system All machines shall meet the secondary brake per- formance requirements of 7.6 or 7.7, as applicable. The secondary brake system shall be modulated as defined in 3.10. 5.5 Parking brake system A pa
41、rking brake disconnect (release) designed to al- low movement of disabled machines shall be located outside the operators station unless it can be reap- plied immediately. All machines shall meet the parking brake require- ments of 7.5. After being applied, this system shall not depend on an exhaust
42、ible energy source. The parking brake sys- tem may systems use comma provided the in components with other bra requirements of 7.5 are met. ke 5.6 Warning device for stored energy sources If stored energy is used for the service brake system, that system shall be equipped with a warning device which
43、 is activated before the system energy drops below 50 % of the maximum operating energy level specified by the manufacturer or the level required to meet the secondary brake performance requirements, whichever level is higher. The device shall readily attract the operators attention by providing a c
44、ontinuous visible and/or audible warning. Gauges indicating pressure or vacuum do not meet this requirement. 6 Test conditions 61 while Manufacture carrying out rs Pe preca f-forma utions nce te shall be observed sts. 6.2 The test course shall consist of a hard, dry sur- face with a well-compacted b
45、ase. Ground moisture may be present to the extent that it does not ad- versely affect the braking test. The test course shall not have a slope of more than 3 % at right angles to the direction of travel. Slope in the direction of travel shall be as specified for the test being carried out. The appro
46、ach to the test course shall be of sufficient length, smoothness and uniformity of slope to ensure the required machine speed is reached before the brakes are actuated. 6.3 The machine mass and axle load distribution shall be as defined in 6.3.1 or 6.3.2, as applicable. 6.3.1 The test mass of all ma
47、chines except dumpers and tractor-scrapers shall be as stated in 3.4 without a payload and at the manufacturers specified axle load distribution. 6.3.2 The test mass of dumpers and tractor-scrapers shall be as stated in 3.4 and include a payload. The machine test mass shall be equal to the manufac-
48、turers specifications for gross mass (the sum of the machine mass and payload) and axle load distribution. 6.4 All parameters relating to braking systems shall be within the machine manufacturers specifications, i.e. tyre size and pressure, brake adjustment, warning 3 IS0 3450:1996(E) 0 IS0 actuatio
49、n point, etc. All brake system pressures shall be within the machine manufacturers specification range. No manual adjustment(s) shall be made to the braking system during any single performance test. 6.5 When the machine transmission provides a selection of gear ratios, the stopping tests shall be conducted with the transmission in the gear corre- sponding to the test speed specified. The power train may be disengaged prior to completing the stop. 6.6 Retarders shall not be used during the service brake performance test, but they are allow
