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1、ASAE D203.13 FEB03 Front and Rear Power Take-Off for Agricultural Tractors American Society of Agricultural Engineers ASAE is a professional and technical organization, of members worldwide, who are dedicated to advancement of engineering applicable to agricultural, food, and biological systems. ASA
2、E Standards are consensus documents developed and adopted by the American Society of Agricultural Engineers to meet standardization needs within the scope of the Society; principally agricultural field equipment, farmstead equipment, structures, soil and water resource management, turf and landscape
3、 equipment, forest engineering, food and process engineering, electric power applications, plant and animal environment, and waste management. NOTE: ASAE Standards, Engineering Practices, and Data are informational and advisory only. Their use by anyone engaged in industry or trade is entirely volun
4、tary. The ASAE assumes no responsibility for results attributable to the application of these ASAE Standards, Engineering Practices, and Data. Conformity does not ensure compliance with applicable ordinances, laws and regulations. Prospective users are responsible for protecting themselves against l
5、iability for infringement of patents. This standard may be designated ANSI/ASAE. If so, this standard is an American National Standard. Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been
6、met by the standards developer. 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 agreement means much more than a simple majority, but not necessarily unanimity. Con
7、sensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. CAUTION NOTICE: In the case that this standard is an ANSI/ASAE standard, this American National Standard may be revised or withdrawn at any time. The procedures of the American N
8、ational Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Copyright American Society
9、 of Agricultural Engineers. All rights reserved. ASAE-The Society for engineering in agricultural, food, and biological systems 2950 Niles Rd., St. Joseph, MI 49085-9659, USA ph. 269-429-0300, fax 269-429-3852, hqasae.org ASAE S203.13 FEB03 Front and Rear Power Take-Off for Agricultural Tractors Ori
10、ginally developed in 1926 by a conference of engineers representing tractor manufacturers; adopted by ASAE April 1927; revised July 1928, March 1931, August 1941, June 1952; revision submitted by the Farm and Industrial Equipment Institute; approved by the ASAE Power and Machinery Division Standards
11、 Committee 1958, 1961, June 1964, June 1966, December 1966, December 1967, December 1968, December 1969; revised editorially March 1973; reconfi rmed December 1974; revised and combined with ASAE S204.6, 1000-RPM Power Take-Off for Agricultural Tractors, March 1976; revised March 1978, January 1982;
12、 reconfi rmed December 1986; revised March 1990, February 1991; revised editorially September 1991, April 1993; revised March 1994; reaffi rmed December 1994, December 1995, December 1996, December 1997, December 1998, December 1999, January 2001, December 2001, February 2003. 1 Purpose and scope 1.
13、1 This Standard specifi es a suitable means of mechanical power transmissionfromthetractortotheimplement,andpromotes dimensional interchangeability of tractors and towed implements with the same type power take-off (see table 1). 1.2 This Standard provides dimensions relating to the tractor front an
14、d rear power take-off shaft, and power take-off shield. 1.3 This Standard provides specifi cations for the splined power take-off- shaft and the mating connector. 1.4 This Standard establishes and defi nes type 1, 2, and 3 power take- off shaft (see table 1). 1.5 Thesuccessfulperformanceofalltractor
15、andimplement combinations likely to be met in fi eld service requires consideration of factors other than the dimensional relationships provided in this Standard. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this St
16、andard. At the time of publication, 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. Standards organizations
17、maintain registers of currently valid standards. ANSI/ASAE S318.10 JUL93,Safety for Agricultural Equipment ASAE S207.12 MAR94,Operating Requirements for Tractors and Power Take-Off Driven Implements ASAE S482 MAR94,DrawbarsAgricultural Wheel Tractors 3 Defi nitions power take off, PTO: An external s
18、haft on the front or rear of the tractor to provide rotational power to implements. 4 Specifi cations 4.1 The tractor rear PTO shaft is classifi ed into three types and shall conform to the specifi cations shown in fi gures 1, 2, 3, and 4 and table 1. The front PTO shaft shall conform to the dimensi
19、ons shown in fi gures 1 and 3 and the type 2 portion of table 1. 4.2 The location of both front and rear tractor PTO shafts shall be within the limits of 25 mm (1 in.) to the right or left of the tractor centerline, with the centerline being the recommended location. 4.3 The direction of PTO shaft r
20、otation shall be: Rear PTOclockwise when facing in the direction of forward travel; Front PTOclockwise when facing the projecting end of the shaft. 4.4 A means to indicate when the PTO shaft is operating at standard speed shall be provided on tractors capable of driving the 540 r/min shaft in excess
21、 of 600 r/min and the 1000 r/min shaft in excess of 1100 r/min. 4.5 Tractors capable of driving the 540 r/min shaft 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. (see annex A) 4.6 The tractor PTO
22、shield shall conform to ANSI/ASAE S318. Tractor PTO shield dimensions shall conform to fi gures 6 and 7. Table 1 Power take-off shaft dimensions* (see fi gure 1) Type 1Type 2Type 3 Nominal diameter35 mm (1 3/8 in.)35 mm (1 3/8 in.)45 mm (1 3/4 in.) standard operating speed-r/min 54061010006251000625
23、 AGroove to end of shaft 38.1 (1.50)60.8 (0.03)25.4 (1.00)60.8 (0.03)38.1 (1.50)60.8 (0.03) BEffective spline length with relation gage, min76.2 (3.00)63.5 (2.50)88.9 (3.50) CChamfer 7.1 (0.28)60.8 (0.03)4.8 (0.19)60.8 (0.03)7.6 (0.30)60.8 (0.03) DChamfer angle 0.5 rad (30 deg)60.5 (3.0)0.5 rad (30
24、deg)60.5 (3.0)0.5 rad (30 deg)60.5 (3.0) EID of groove 29.46 29.26 1.160! 1.152! 29.46 29.26 1.160! 1.152! 37.34 37.13 1.470! 1.462! FRadius of groove 6.8660.256.8660.258.3860.25 (0.27060.010)(0.27060.010)(0.33060.010) GSpherical clearance radius on tractor, min82.6 (3.25)82.6 (3.25)101.6 (4.00) HLo
25、cation of center of clearance radius0.012.7 (0.50)0.0 JBreak sharp corner of chamferYesOptionalOptional *Dimensions are in mm (in.) except where indicated otherwise. 60ASAE STANDARDS 2003 -,-,- 4.7 Dimensions associated with the drawbar shall conform to ASAE S482. 4.8 Dimensional association between
26、 the tractor power take-off shaft, drawbar, and implement input connection, IIC, shall conform to ASAE S207. Figure 3 Type 2 power take-off 1000 r/min35 mm (1 3/8 in.) diameterinvolute spline dimensions Figure 1 Power take-off shaft (see table 1) The circumferential groove is provided for a locking
27、means in the implement hub. Effective spline length, B, to be heat treated for surface durability (within Rockwell C 48-56) Figure 2 Type 1 power take-off 540 r/min35 mm (1 3/8 in.) diameter straight side spline dimensions ASAE STANDARDS 200361 Figure 4 Type 3 power take-off 1000 r/min45 mm (1 3/4 i
28、n.) diameterinvolute spline dimensions Figure 5 Location of PTO Table 2 Location of PTO (see fi gure 5) PTO typeh minh max 1530 (21)1)800 (31) 2530 (21)820 (32) 3600 (24)910 (36) 1)May be reduced to 350 mm on tractors with a minimum track setting of 1150 mm or less. 62ASAE STANDARDS 2003 Annex A (in
29、formative) Future Provisions*) If a shiftable PTO is provided, a means shall be employed on the tractor to prevent overspeeding by type 1 tractor PTO shaft in excess of 630 r/min, or type 2 tractor PTO shaft in excess of 1170 r/min (see 4.5). *)Future provisions are intended to provide lead time for conformance. Future provisions are reviewed annually. Figure 6 Power take-off shield for tractor with types 1 and 2 PTO Figure 7 Power take-off shield for tractor with type 3 PTO ASAE STANDARDS 200363 -,-,-
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