1、 ANSI/ASABE AD8759-1:1998 JAN2013 Agricultural wheeled tractors Front-mounted equipment Part 1: Power take-off and three-point linkage American Society of Agricultural and Biological Engineers ASABE is a professional and technical organization, of members worldwide, who are dedicated to advancement
2、of engineering applicable to agricultural, food, and biological systems. ASABE Standards are consensus documents developed and adopted by the American Society of Agricultural and Biological Engineers to meet standardization needs within the scope of the Society; principally agricultural field equipm
3、ent, farmstead equipment, structures, soil and water resource management, turf and landscape equipment, forest engineering, food and process engineering, electric power applications, plant and animal environment, and waste management. NOTE: ASABE Standards, Engineering Practices, and Data are inform
4、ational and advisory only. Their use by anyone engaged in industry or trade is entirely voluntary. The ASABE assumes no responsibility for results attributable to the application of ASABE Standards, Engineering Practices, and Data. Conformity does not ensure compliance with applicable ordinances, la
5、ws and regulations. Prospective users are responsible for protecting themselves against liability for infringement of patents. ASABE Standards, Engineering Practices, and Data initially approved prior to the society name change in July of 2005 are designated as “ASAE“, regardless of the revision app
6、roval date. Newly developed Standards, Engineering Practices and Data approved after July of 2005 are designated as “ASABE“. Standards designated as “ANSI“ are American National Standards as are all ISO adoptions published by ASABE. Adoption as an American National Standard requires verification by
7、ANSI that the requirements for due process, consensus, and other criteria for approval have been met by ASABE. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agree
8、ment means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. CAUTION NOTICE: ASABE and ANSI standards may be revised or withdrawn at any time. Additionally, pro
9、cedures of ASABE require that action be taken periodically to reaffirm, revise, or withdraw each standard. Copyright American Society of Agricultural and Biological Engineers. All rights reserved. ASABE, 2950 Niles Road, St. Joseph, Ml 49085-9659, USA, phone 269-429-0300, fax 269-429-3852, hqasabe.o
10、rg ANSI/ASABE AD8759-1:1998 JAN2013 Copyright American Society of Agricultural and Biological Engineers 1 ANSI/ASABE AD8759-1:1998 JAN2013 Revision approved February 2013 as an American National Standard Agricultural wheeled tractors Front-mounted equipment Part 1: Power take-off and three-point lin
11、kage These materials are subject to copyright claims of ISO, ANSI and ASABE. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ASABE. All requests pertaining to ANSI/ASABE AD8759-1:1998 JAN2013 standard should
12、 be submitted to ASABE. This standard was reviewed for adoption with deviations by the ASABE Power and Machinery Tractors and Tractor Implement Interface/PTO Technical subcommittees, and has been formally approved. This adoption, along with the adoption with deviations of ISO 500-1:2004/Cor. 1:2005
13、and ISO 8759-2:1998 and the identical adoptions of ISO 500-2:2004 and ISO 500-3:2004 replaced ASAE S203.14 FEB04 and ASAE S513 FEB03. Rear mounted PTOs are addressed in the ISO 500 adoptions, front mounted in the ISO 8759 adoptions. Adopted by ASABE December 2010; approved as an American National St
14、andard January 2011; revised June 2012; revision approved by ANSI June 2012; revised January 2013; revision approved by ANSI February 2013. Keywords: Clearance zone, Front hitch, Master shield, Power take-off, Safety, Speed, Three-point linkage, Tractor 0 Foreword 0.1 ANSI/ASABE AD8759-1:1998, Agric
15、ultural wheeled tractors Front-mounted equipment Part 1: Power take-off and three-point linkage, is an adoption with deviations of the identically titled ISO document ISO 8759-1:1998, Agricultural wheeled tractors Front-mounted equipment Part 1: Power take-off and three-point linkage. Deviations not
16、ed in the following Foreword sections pertain to those provisions where harmonization could not be achieved between ASABE and the International Standard. 0.2 ANSI/ASABE AD8759-1:1998 specifies dimensions and requirements for power take-off and for front three-point linkages in association with a pow
17、er lift for the attachment of implements or equipment to the front of agricultural wheeled tractors. It is not applicable to tractors which are designed to run in two directions, where either end can be considered to be the front or rear; in this case ANSI/ASABE AD500-1:2004 W/Cor.1, ASABE/ISO 500-2
18、:2004, ASABE/ISO 500-3:2004 and ISO 730 apply. 0.3 Two normative references are listed in ISO 8759-1:1998. These references have been reviewed and accepted as part of the adoption with deviations of ANSI/ASABE AD8759-1:1998. 0.4 This standard has been approved as an American National standard by ANS
19、I (American National Standards Institute). The original content of ISO 8759 was based on ASAE S203 and ASAE S217. 0.5 This standard deviates from ISO 8759-1:1998 as follows: 0.5.1 In Scope replace ISO 500 reference with ANSI/ASABE AD500-1:2004 W/Cor.1, ASABE/ISO 500-2:2004, and ASABE/ISO 500-3:2004.
20、 Any reference to ISO 500 in the printed portion of the ISO text shall be replaced by ANSI/ASABE AD500-1:2004 W/Cor.1, ASABE/ISO 500-2:2004, and ASABE/ISO 500-3:2004. 0.5.2 In Scope replace ISO-730-1 reference with ISO-730. 0.5.3 Clause 4.4 refers to the PTO protective device (Master Shield) and sta
21、tes that “if the protective device is not designed to be used as a step, it may be flexible”. If the Master Shield can be used as a step, then it shall be designed according to ISO 500-1 and shall be capable of withstanding a vertical static load of 1200N without permanent deformation. (Ref ISO 2632
22、2-1). ANSI/ASABE AD8759-1:1998 JAN2013 Copyright American Society of Agricultural and Biological Engineers 2 0.5.4 ASABE S203.14 previously did not specify a Type 1 (35 mm, 540 rpm) or Type 3 (45 mm, 1000 rpm) PTO. ISO 8759-1:1998 specifies Type 1, 2 and 3 with rotation in the clockwise direction as
23、 viewed from the front of the tractor. ISO 8759-1:1998 further specifies that the Type 1 shaft, have rated rotational frequency of 540 rpm or 1000 rpm with rotation in the anti-clockwise direction as viewed from the front of the tractor. A Type 1 shaft with rated rotational frequency of 1000 rpm sha
24、ll not be used. Only Type 1 (35mm, 540 rpm), Type 2 (35 mm, 1000 rpm) or Type 3 (45 mm, 1000 rpm) shafts shall be used and shall have rotation in the anti-clockwise direction as viewed from the front of the tractor. 0.5.5 Over speed requirements 0.5.5.1 Tractors capable of driving the 540 r/min shaf
25、t in excess of 630 r/min and the 1000 r/min shaft in excess of 1170 r/min shall also include a suitable warning of operation in excess of those speeds 0.5.5.2 If a shiftable PTO is provided, a means shall be employed on the tractor to prevent over speeding of a Type 1 tractor PTO shaft in excess of
26、630 r/min, or a Type 2 tractor PTO shaft in excess of 1170 r/min. Text of ISO 8759-1:1998; Agricultural wheel tractors Front-mounted equipment Part 1: Power take-off and three-point linkage, follows. 1 Scope This part of ISO 8759 specifies dimensions and requirements for power take-off and for three
27、-point linkages in association with a power lift for the attachment of implements or equipment to the front of agricultural wheeled tractors. It is not applicable to tractors which are designed to run in two directions, where either end can be considered to be the front or the rear; in this case ISO
28、 500 and ISO 730-1 apply. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 8759. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agre
29、ements based on this part of ISO 8759 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 500:1991, Agricultural tractors Rear-mounted power take
30、-off Types 1, 2 and 3. ISO 730-1:1994, Agricultural wheeled tractors Rear-mounted three-point linkage Part 1: Categories 1, 2, 3 and 4. 3 Definitions For the purposes of this part of ISO 8759, the following definition and those given in ISO 730-1:1994 apply, except for definitions 3.2.251)and 3.2.26
31、1)which concern convergence and are not applicable to front-mounted linkages. Additionally, pitch (3.2.211) is considered positive when clockwise as viewed from the left-hand side of the tractor. 3.1 front of the tractor leading end of the machine when moving in the normally accepted direction of tr
32、avel on the road, as characterised by the relative positions of the seat, steering wheel, controls and road lighting equipment _ 1)These references concern ISO 730-1:1994 ANSI/ASABE AD8759-1:1998 JAN2013 Copyright American Society of Agricultural and Biological Engineers 3 4 Power take-off (PTO) 4.1
33、 Type, rotational frequency and direction of rotation The power take-off (PTO) shall conform to ISO 500. It shall be either of type 2 ( 35 mm, 21 splines) or type 3 ( 45 mm, 20 splines). The rated rotational frequency shall be 1 000 min1and rotation shall be in the clockwise direction when viewed fr
34、om the front of the tractor. The direction of rotation shall be indicated by an arrow. NOTE If in special cases a power take off of type 1 ( 35 mm, 6 splines) is provided, the rated rotational frequency is then be 540 min1or 1 000 min1and rotation is in the anti-clockwise direction when viewed from
35、the front of the tractor. 4.2 Location The location of the axis of the power take-off shall lie within the shaded rectangle shown in figure 1. Figure 1 Location of power take-off (viewed from the front of the tractor) 4.3 Clearance zone around PTO The clearance zone around the power take-off shall b
36、e in accordance with figure 2 and table 1. The dimensions g and i may be transposed. ANSI/ASABE AD8759-1:1998 JAN2013 Copyright American Society of Agricultural and Biological Engineers 4 Figure 2 Clearance zone ANSI/ASABE AD8759-1:1998 JAN2013 Copyright American Society of Agricultural and Biologic
37、al Engineers 5 Table 1 Dimensions of the clearance zone Dimensions in millimetres PTO Type a min. b max. g min. i min. r max. 1 76 481)2401)2001)762 76 481)2401)2001)76 3 89 100 290 295 891)On tractors with a minimum track setting of 1 150 mm or less, dimensions may be reduced to b = 40 mm, g = 190
38、mm, i = 175. 4.4 Protection of PTO A protective device in accordance with figure 3 and table 2 shall be supplied by the manufacturer and shall be fixed at the tractor, unless an equivalent protective device ensures the same degree of protection. Two options are specified; the first provides minimum
39、protection and the second maximum protection. If the protective device is not designed to be used as a step, it may be flexible. Provision shall be made for anchoring the power take-off drive shaft guard. Fully closed protective devices may be used. Figure 3 Protective device ANSI/ASABE AD8759-1:199
40、8 JAN2013 Copyright American Society of Agricultural and Biological Engineers 6 Table 2 Dimension of the protective device Dimensions in millimetres PTO Type Minimum protection Maximum protection n 5 m 5 p + 50k min. n 5 m 5 p + 50k min. 1 901)1301)2901)70 601)1201)2001)70 2 901)1301)2901)70 601)120
41、1)2001)70 3 130 155 390 80 100 145 295 80 1) On tractors with a minimum track setting of 1 150 mm or less, dimensions may be reduced to n = 40 mm, m = 100 mm, p = 175 mm. 4.5 Operation of controls The rated rotational frequency of the PTO shall be indicated at the level of the drivers work place or
42、at the level of the control itself. Unintentional engagement shall be avoided. If more than one rotational frequency is provided, unintentional change-over to a higher frequency shall be avoided. 5 Three-point linkage The dimensions specified in ISO 730-1: 1994, clauses 4.1 and 5.1, apply with the e
43、xception of the following: a) hitch points (ISO 730-1:1994, subclause 4.1.1): the dimensions of the hitch points shall be in accordance with those indicated for categories 2 and 3; b) upper link point arrangements (ISO 730-1:1994, subclause 4.1.2): the arrangement of an upper link point shall allow
44、an inclination of the mast between 3 to + 3 from the vertical and a transport pitch of 8 to 12 where both are related to the vertical mast position; c) torsional free float and levelling adjustment (ISO 730-1:1994, subclause 4.1.3 and 4.1.4): these provisions are not required for a front-mounted lin
45、kage; d) transport height (ISO 730-1:1994, table 3): the minimim transport height shall be 850 mm for category 2 and 965 mm for category 3; e) lower hitch point clearance (ISO 730-1:1994, table 3): in order to allow oscillation to the front axle and turning of the front tyre, the lower hitch point clearance shall be at least 250 mm relative to the straight ahead position of the front tyres.
