1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2009 SAE InternationalAll rights reserved. No part of this publication may be
3、reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying,recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-
4、776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSURFACEVEHICLESTANDARDJ283REAF.APR2009Issued 1972-01Reaffirmed 2009-04Superseding J283 NOV1999Test Procedure for Measuring Hydraulic Lift Capacity on Agricultural Tractors Equipped with Three-point Hitch1. ScopeThe lift capacity
5、can be determined by Section 4 and/or Section 5. When the results are recorded,the test method shall be identified.1.1 PurposeThe purpose of this SAE Standard is to establish test procedures for measuring and recording liftcapacity referred to in SAE J715 (Reference International Standard ISO 789/II
6、).2. References2.1 Applicable PublicationsThe following publications form a part of this specification to the extent specifiedherein. Unless otherwise indicated, the latest issue of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-00
7、01.SAE J708 DEC84Agricultural Tractor Test CodeSAE J711 MAR91Tire Selection Tables for Agricultural Tractors of Future DesignSAE J715 JUN93Three-Point Free-Link Hitch Attachment of Implements to Agricultural WheeledTractorsSAE 2708 APR93Agricultural Tractor Test Code (OECD)2.1.2 ISO PUBLICATIONAvail
8、able from ANSI, 11 West 42nd Street, New York, NY 10036-8002.ISO 789/88/IIAgricultural tractorsTest procedures Part 2: Hydraulic power and lifting capacity2.2 Related PublicationThe following publication is provided for information purposes only and is not arequired part of this document.2.2.1 ASAE
9、PUBLICATIONAvailable from ASAE, 2950 Niles Road, St. Joseph, MI 49085-9659.ASAE S349.2Test Procedure for Measuring Hydraulic Lift Force Capacity On Agricultural TractorsEquipped With Three-Point HitchSAE J283 Reaffirmed APR2009-2-3. General3.1 The accuracy of the measurements shall be as follows:3.1
10、.1 TIME2%3.1.2 TEMPERATURE2 C3.1.3 PRESSURE2%3.1.4 MASS (WEIGHTS)1/2%3.1.5 DISTANCE3 mm3.2 Check and adjust hydraulic system pressure, if required, to be within manufacturers specification. Thehydraulic oil temperature shall be maintained (10 C) at the value measured in the tractor during a 2 hmaxim
11、um power PTO test. A hydraulic system oil temperature determined from maximum power drawbaroperation shall be used when a PTO test cannot be conducted. These tests, if conducted, shall be inaccordance with SAE J708.3.3 Lift time, if required, shall be recorded as the average of three consecutive lif
12、t sequences.3.4 Measurements and test data shall be recorded as shown in Figure 1.3.5 This same procedure shall be used to determine the hydraulic lift capacity of tractors equipped with a quick-attaching coupler.4. Static Lift Force Test4.1 With the lower links horizontal, set the mast to 457 mm fo
13、r Category I, to 483 mm for Category II, to 559 mm forCategory III, and to 686 mm for Category IV. With the lower links horizontal, adjust the upper link such that themast is vertical (see Figure 2).4.2 A test frame shall be used which provides the mast height for each category in accordance with 4.
14、1 and suchthat the lower hitch point spread is proper for the category being tested. (Category I, 681.0 to 684.3 mm;Category II, 822.5 to 825.5 mm; Category III, 963.7 to 966.7 mm; Category IV, 1165 to 1168 mm.) The liftforce application point shall be 610 mm to the rear of the lower hitch point wit
15、h the lower links horizontal. Theconstruction angle (the angle between the mast and the test frame load arm) shall be 90 degrees (see Figure2). The center of gravity shall be at a point 610 mm to the rear of the hitch points, on a line at right angles tothe mast and passing through the middle of the
16、 line joining the lower hitch points.4.3 Tractors with pneumatic tires shall be rigidly supported at the height from ground level equivalent to the loadedradius of the largest R-1 rear tires and the corresponding largest front tires ( see SAE J711). The tire sizes andloaded radii used shall be liste
17、d as part of the test data, Figure 1. Tractors equipped with rubber tracks shall berigidly supported at the height from ground equivalent to that height as measured statically on a hard flatsurface with no hitch load. If the tractor tested cannot be conveniently supported at this radius, it is permi
18、ssibleto mathematically adjust the readings to the specified largest front and rear loaded radii or measureddimension.4.4 The tractor should be operated at rated engine speed.4.5 The hydraulic lift systems oil temperature shall be determined and maintained as specified in 3.2.SAE J283 Reaffirmed APR
19、2009-3-FIGURE 1TEST DATASAE J283 Reaffirmed APR2009-4-FIGURE 2TEST FRAME4.6 The tests shall be conducted so that lift force is measured throughout the total lift range as specified in SAEJ715. Since the minimum power range is less than the total lift range, links may be adjusted once during thetests
20、 to obtain lift force throughout the total lift range. If the links are readjusted to meet the specified lift range,this information shall be recorded.4.7 Tractors equipped with more than one upper link attaching point on the tractor should have the upper linkattached to the category position recomm
21、ended by the manufacturer for heavy draft implements such asmounted plows, etc.4.8 Measure the vertical force, at static conditions, available from the 610 mm (24 in) point on the test frame andinclude the weight of the test frame. This vertical lift force shall be measured at not less than 6 points
22、, equallyspaced, including the maximum and the minimum points, throughout the total lift range. The pressurerecorded during the test must exceed the minimum relief valve pressure setting. The value of force measuredshall be mathematically corrected to correspond to a hydraulic pressure equivalent to
23、 90% of the minimumrelief valve setting.4.9 The smallest corrected value determined in 4.8 shall be the tractor static hydraulic lift force.5. Dynamic Lift Capacity Test5.1 A test frame and tractor shall be used as described in 4.2 and 4.7.5.2 The tractor shall be rigidly supported from ground level
24、 as described in 4.3.5.3 A mass shall be mounted on the frame so that its center of gravity and the frame center of gravity arepositioned as described in 4.2. The value determined in 4.8 can be used as a starting point.5.4 The hydraulic lift systems oil temperature and pressure shall be determined a
25、nd maintained as specified in3.2.5.5 The dynamic lift test shall be conducted so that the mass is lifted throughout the total lift range as specified inSAE J715. Since the minimum power range in SAE J715 is less than the total lift range, links may be adjustedonce during the tests to assure the mass
26、 is capable of being lifted throughout the total lift range. If the links arereadjusted to meet the specified lift range, this information shall be recorded in Figure 1.SAE J283 Reaffirmed APR2009-5-5.6 With the manually operated engine governor control set to provide rated engine speed, execute a l
27、ift sequenceusing the mass selected in 5.3. Adjust the mass as necessary to obtain the maximum mass which can be (a)fully lifted through the specified tractor lift range and (b) does not require more than 10 s to move through theminimum power range as specified in SAE J715. Repeat the test using a m
28、aximum 6 s lift time and amaximum 3 s lift time.6. Notes6.1 Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title i
29、ndicates a complete revision of the report.PREPARED BY THE SAE AGRICULTURAL TRACTOR TECHNICAL COMMITTEEREAFFIRMED BY ASABE COMMITTEE PM-23/2, AGRICULTURAL MACHINERY COMMON TEST PER MOU BETWEEN SAE AND ASABESAE J283 Reaffirmed APR2009RationaleThe three-point hitch static lift force test procedure was
30、 revised to be comparable to current ISOand to 1990 changes to OECD Test Codes. (See OECD document AGR/CA/T(91)24/REV1 forreference.) These test codes use a static lift force corrected to 90% of minimum hydraulic pressure toreflect usable in-field lift forces. This revision is also being proposed fo
31、r J2708.The dynamic lift capacity test procedure was expanded to include additional lift times. Lift capacityvalues for 3 s and 6 s lift times were added to the existing 10 s lift time. This was also done to be morerepresentative of in-field operations.Determination of tractor height as tested was e
32、xpanded to include rubber-tracked vehicles.The report form was revised to reflect these changes.J283 is not technically equivalent to ISO 789/II due to:a. Current differences between SAE (ASAE) and ISO hitch dimensions as tested.b. SAE does not include a lift test at the hitch points.c. ISO does not
33、 have a dynamic test procedure.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThe lift capacity can be determined by Section 4, and/or Section 5. When the results arerecorded, the test method shall be identified.Reference SectionSAE J708 DEC84Agricultural Tractor Test CodeSAE
34、J711 MAR91Tire Selection Tables for Agricultural Tractors of Future DesignSAE J715 JUN93Three-Point Free-Link Hitch Attachment of Implements to Agricultural WheeledTractorsSAE 2708 APR93Agricultural Tractor Test Code (OECD)ISO 789/88/IIAgricultural tractorsTest procedures Part 2: Hydraulic power and lifting capacityASAE S349.2Test Procedure for Measuring Hydraulic Lift Force Capacity On Agricultural TractorsEquipped With Three-Point HitchDeveloped by the SAE Agricultural Tractor Technical Committee
