BS-AU-172C-1990.pdf

BRITISH STANDARD AUTOMOBILE SERIES BS AU 172c:1990 Incorporating Amendment No. 1 (Superseding BS AU 172b:1990) Specification for Performance requirements for accessory jacks for vehicles Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 This British Standard, having been prepared under the direction of the Automobile Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 30 March 1990 © BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference AUE/9 Draft for comment 89/78629 DC ISBN 0 580 18274 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Policy Committee (AUE/-) to Technical Committee AUE/9, upon which the following bodies were represented: Automobile Association Consumer Policy Committee of BSI Department of Trade and Industry (Consumer Safety Unit, CA Division) Department of Transport Garage Equipment Association Institute of Trading Standards Administration Motor Agents Association Ltd. Royal Automobile Club Society of Motor Manufacturers and Traders Ltd. The following body was also represented in the drafting of the standard, through subcommittees and panels: Association for Consumer Research (ACRE) Amendments issued since publication Amd. No.Date of issueComments 8556August 1995Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 © BSI 03-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2General1 3Performance1 4Design1 5Marking2 6Instructions for safe use2 Appendix A Classification of vehicles in accordance with the Commission of the European Communities (EEC/Brussels) and the UN Economic Commission for Europe (ECE/Geneva)3 Appendix B Methods of tests3 Table 1 Classification of vehicles in accordance with the Commission of the European Communities (EEC/Brussels) and the UN Economic Commission for Europe (ECE/Geneva)3 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 ii © BSI 03-2000 Foreword This British Standard has been prepared under the direction of the Automobile Standards Policy Committee, to establish a standard of safety during lifting for accessory jacks for passenger cars or passenger car derivatives and towed units. Examples of use are for changing the wheel and for inserting axle stands. It is important that the design, manufacture and materials of the jack are kept within the compass of sound engineering practice so that the jack is suitable for the purpose intended. This amendment introduces a method of test, B.5, for the permanence of markings which replaces reference to BS 4781-1:1973 and BS 4781-2:1979. The amended standard supersedes BS AU 172b which is withdrawn. 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. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, 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 front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 © BSI 03-20001 1 Scope This British Standard specifies the safety requirements for the performance of general purpose accessory jacks for vehicles of the following categories (see Appendix A): passenger car M1 and N1; towed units O1 (i.e. under 0.75 t). Trolley jacks as specified in BS AU 154 or original equipment jacks as specified in BS AU 165 are not covered by this standard. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 General All accessible surfaces shall be free from sharp edges and lubricant shall be applied to moving parts. 3 Performance 3.1 General New accessory jacks shall be used for each of the tests specified in Appendix B. 3.2 Endurance When tested in accordance with B.1, there shall be no failure or visible permanent deformation. At completion of the test, the force required to operate the jack shall not differ from the value determined before the test commenced by more than 10 %. At completion of the test, the jack shall comply with clause 4. 3.3 Load capacity When tested in accordance with B.2, there shall be no failure or visible permanent deformation. The reduction of height shall not exceed 5 %. 3.4 Stability When tested in accordance with B.3, the jack shall remain stable. The upper surface of the head of the jack shall not tilt more than 10 ° out of parallel with the surface on which it is standing. 3.5 Overtravel When tested in accordance with B.4, overtravel shall not occur, nor shall the overtravel mechanism fail. 4 Design 4.1 The head of the jack shall be designed so as to counteract slipping (e.g. by ribbing or by cross hatching). The lifting pad shall have a minimum bearing area of 600 mm2 and a minimum width of 25 mm. 4.2 The rate at which the jack is lifted or lowered shall be capable of being regulated, or stopped, under all loading conditions. The direction of operation shall not be reversible due to any load condition. 4.3 The method of release of hydraulic jacks shall require a distinctly different operation from raising. It shall only be possible to raise and lower any jack from the same side. 4.4 It shall not be necessary to reach under the vehicle to operate the jack, other than to place it in position and to remove it after it has been lowered. 4.5 For jacks with a capacity up to 2 t, the projected area of the base within 10 mm of the lowest point shall have an area of at least 50 cm2/t. For jacks with a capacity in excess of 2 t the minimum area of the base shall be calculated on the basis of 100 cm2 plus 5 cm2/t of the rated capacity. 4.6 There shall be positive means of preventing overtravel without any damage or jamming or failure at maximum extension when tested in accordance with Appendix B.4. NOTEA pressure release valve incorporated in a hydraulic jack is not sufficient to comply with this requirement. 4.7 Hydraulic jacks shall incorporate an overload device. Where a jack is fitted with a means of protection against raising the head cap under a load in excess of its nominal capacity, such protection shall operate at the nominal capacitypercent. 4.8 It shall not be possible for the user to lift the vehicle with a jack incorrectly assembled. It shall not be possible to remove the lifting pad without the use of tools. +10 0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 2 © BSI 03-2000 5 Marking The jack shall be permanently marked with the following information: a) the number and date of this British Standard, i.e. BS AU 172c:19901); b) the safe working load (in tonnes); c) a warning to locate the jack securely, to use it on a firm level surface and to chock the wheels. The following statement in bold type: “Do not get under the car when it is supported only by a jack”; d) the additional statement “Refer to instructions for safe use”; e) the manufacturers name, trade mark or other means of identification; f) the fluid to be used for a hydraulic jack. After testing in accordance with B.5 all markings shall be legible. 6 Instructions for safe use Instructions for use shall be provided with the jack as follows: “Note that the jack is for wheel changing and snow chain attachment (if appropriate). Lift only one wheel at a time. Do not place any part of your body under the vehicle when it is supported by the jack alone. Use hazard lights when wheel changing at the roadside. Apply the handbrake and place the gears in first or reverse, or “P” on automatic transmissions. Chock the wheels. Occupants should leave the vehicle. Do not start the engine when the vehicle is jacked up. Loosen wheel nuts slightly prior to jacking up the vehicle. Screw up the wheel nuts before lowering the vehicle. Finally tighten the wheel nuts after lowering the vehicle. Securely stow the jack and do not leave loose. Note that it is very dangerous for users to go underneath a vehicle supported by a jack, whether or not other supports are in use. Take special advice before using the jack on a caravan or light trailer. Note that the jack should be inspected and lubricated regularly.” Manufacturers should take note of the DTI/Institute for Consumer Ergonomics document “Instructions for Consumer Products”. 1) Marking BS AU 172c on or in relation to a product represents a manufacturers declaration of conformity, ie a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a declaration is not the be confused with third party certification of conformity, which may also be desirable. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 © BSI 03-20003 Appendix A Classification of vehicles in accordance with the Commission of the European Communities (EEC/Brussels) and the UN Economic Commission for Europe (ECE/Geneva) Table 1 Classification of vehicles in accordance with the Commission of the European Communities (EEC/Brussels) and the UN Economic Commission for Europe (ECE/Geneva) Appendix B Methods of tests B.1 Endurance test Support the jack on a flat horizontal surface and lubricate as required throughout the tests. Cycle the jack mechanism 100 times against a load equal to the marked safe working load. Each cycle shall commence at one half of the lifting height, rise to within 5 mm of the full extent, remain there for 2 min, and then return to the one half level. B.2 Load capacity test Support the base of the jack on a flat horizontal surface. Raise the lifting pad from one-third of its maximum extension to its full extent against a load equivalent to the safe working load. Set the jack at half travel. Apply a load equal to twice the safe working load to the lifting pad for a period of 1 h. Where an overload limiting device prevents the application of twice the safe working load, then sustain a load of not less than 105 % of the safe working load for 15 min. B.3 Stability test B.3.1 Carry out the tests B.3.2 and B.3.3 with the jack at its maximum extension, apply a force equivalent to the marked safe working load to the lifting pad by means of a 60 ° steel cone. Place the jack base on a flat steel surface, and constrain the point of the cone to move in a vertical line of action. B.3.2 With the jack base horizontal, apply the load at a point on the greatest horizontal dimension of the lifting pad 75 % of the radial distance from the centre, for a minimum of 60 s. If the lifting pad can be rotated with respect to the jack base, choose the least favourable angular position. B.3.3 Support the jack base at an angle of 6 ± 0.5° from the horizontal and apply the load to the centre of the lifting pad for a minimum of 60 s. Choose the angular position of the jack base to be least favourable for stability. B.3.4 If the lifting pad has a hole or recess at the required loading position that prevents contact of the point of the cone, a flat steel plate 3 mm to 6 mm in thickness can be placed between the cone and the lifting pad upper surface. B.4 Overtravel test Operate the jack to full extension and apply a torque of 40 Nm to the operating handle of the jack. In the case of hydraulically operated jacks operate the mechanism at a speed between 20 and 40 cycles per minute. B.5 Test for permanence of marking B.5.1 Test sample Take a sample jack from a batch as specified by the manufacturers quality control procedures or customer requirements and test the marked area (see clause 5) in accordance with B.5.2. For ease of handling, a section of the jack containing the marked area may be cut or removed from the sampled jack. B.5.2 Procedure B.5.2.1 Immerse the test sample in commercial unleaded petrol to BS EN 228 for 10 min at 20 °C ± 2 °C. Remove from the petrol and rub the markings over an area of approximately 10 mm × 50 mm with firm hand pressure for 30 s using mutton cloth dampened in the petrol. CategoryCharacteristics MPower-driven vehicles having at least four wheels or having three wheels when the maximum mass exceeds 1 t, and used for the carriage of passengers M1Vehicles used for the carriage of passengers and comprising not more than eight seats in addition to the drivers seat NPower-driven vehicles having at least four wheels or having three wheels when the maximum mass exceeds 1 t, and used for the carriage of goods N1Vehicles used for the carriage of goods and having a maximum mass not exceeding 3.5 t OTrailers (including semi-trailers) O1Single-axled trailers, other than semi-trailers, with a maximum mass not exceeding 0.75 t Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 4 © BSI 03-2000 B.5.2.2 Dry the sample thoroughly in a current of dry air then immerse in clean water into which 0.5 % by volume of detergent has been thoroughly mixed. Keep the sample immersed at 20 °C ± 2 °C for 24 h. Remove from the water and rub the markings over an area of approximately 10 mm × 50 mm with firm hand pressure for 30 s using mutton cloth dampened in water/detergent mixture. B.5.2.3 Examine the test area for legibility and permanence of the marking message. NOTESuitable fume extraction and other safety precautions should be employed during this procedure. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 © BSI 03-2000 Publications referred to BS EN 228, Specification for unleaded petrol (gasoline) for motor vehicles. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 172c:1990 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. 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