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1、INTERNATIONAL STANDARD IS0 10448 First edition 1994-08-01 Agricultural tractors - Hydraulic pressure for implements Trac teurs agricoles - Pression hydraulique pour /es instruments Reference number IS0 10448:1994(E) Copyright International Organization for Standardization Provided by IHS under licen
2、se with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 01:32:16 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 10449:1994(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards
3、 bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organiza
4、tions, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circu
5、lated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 10448 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcom- mittee
6、SC 4, Tractors. 0 IS0 1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organizat
7、ion for Standardization Case Postale 56 ? CH-1211 Geneve 20 ? Switzerland Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 01:32:16 MDTNo reproduction or
8、 networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD Q IS0 IS0 10449:1994(E) Agricultural tractors - Hydraulic pressure for implements 1 Scope This International Standard specifies the character- istics of the hydraulic pressure from agricultural trac- tors to connect hydrauli
9、c devices on implements, to permit interchangeable use of various types of im- plements using remote cylinders and other hydraulic devices. It applies to agricultural tractors intended for inter- changeable implements. 2 Normative references The following standards contain provisions which, through
10、reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applyi
11、ng the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 730-l :-l), Agricultural wheeled tractors - Rear- mounted three-point linkage - Part 1: Categories 1, 2, 3 and 4. IS0 789-lo:-*), Agricultural t
12、ractors - Test pro- cedures - Part 10: Hydraulic power at tractor/implement interface. !SO 5675: 1992, Agricultural tractors and machinery - General purpose quick-action hydraulic couplers. 1) To be published. (Revision of IS0 730-l .1990) 21 To be published. IS0 6149-1:1993, Connections for fluid p
13、ower and general use - Ports and stud ends with IS0 261 threads and O-ring sealing - Pat-t 1: Ports with O-ring seal in truncated housing. IS0 6149-2:1993, Connections for fluid power and general use - Ports and stud ends with IS0 261 threads and O-ring sealing - Part 2: Heavy-duty (S series) stud e
14、nds - Dimensions, design, test meth- ods and requirements. IS0 6149-3:1993, Connections for fluid power and general use - Ports and stud ends with IS0 261 threads and O-ring sealing - Part 3: Light-duty fL series) stud ends - Dimensions, design, test meth- ods and requirements. 3 Definitions For the
15、 purposes of this International Standard, the following definitions apply. 3.1 external hydraulic service: Source of hydraulic power, derived from the hydraulic system of the agri- cultural tractor, available for use on an implement mounted on, coupled to or otherwise used in con- junction with it.
16、3.2 coupler pair: Pair of female hydraulic couplers compatible with male couplers specified in IS0 5675, mounted on agricultural tractors and connected to the hydraulic system to allow flow from one coupler to the other. 3.3 available differential pressure: Steady state difference in hydraulic press
17、ure between two coupler parts on the implement side. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 01:32:16 MDTNo reproduction or networking permitted without license from IH
18、S -,-,- IS0 10448:1994(E) 0 IS0 3.4 maximum pressure: Maximum steady state hydraulic pressure at either male coupler connected to a coupler pair. 3.5 maximum loop return pressure: Maximum steady hydraulic pressure at the male coupler return- ing flow to a hydraulic system that can reverse the flow t
19、hrough that coupler. 3.6 maximum sump return pressure (1) With coupler: Maximum steady state hydraulic pressure at the male coupler returning flow directly to the reservoir. (2) Without coupler: Maximum steady state hy- draulic pressure at an M22 x 1,5 or M27 x 2 thread size port in accordance with
20、IS0 6149-l) IS0 6149-2 or IS0 6149-3, returning flow directly to the reservoir. 3.7 peak pressure: Maximum instantaneous hy- draulic pressure at either male coupler connected to a coupler pair. 4 Requirements Pressures as listed in table 1 should be within their limits as the flow is varied between
21、the specified flow range limits and the loop oil temperature remains within limits. The pressures shall be measured on the implement side (male couplers) which conform to size 12,5 in IS0 5675. The test method shall be in accordance with IS0 789-l 0. Table 1 axlmum pressure Specified flow range 0 to
22、 50 I/min for cat- egories 2 and 3 NOTE - The specified flow range of 0 to 30 I/min is recommended for partial- consuming (e.g. 10 I/min to 30 I/min) devices and of 0 to 50 l/min for continuous-consuming (e.g. 35 I/min to 50 I/min) devices. 1) Categories according to IS0 730-I. Copyright Internation
23、al Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 01:32:16 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by
24、 IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 01:32:16 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Techn
25、ical Standards 1/9972545001 Not for Resale, 04/26/2007 01:32:16 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/
26、26/2007 01:32:16 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 10446:1994(E) ICS 65.060.00 Descriptors: agricultural machinery, agricultural tractors, hydraulic fluid power, hydraulic transmission, hydraulic pressure. Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 01:32:16 MDTNo reproduction or networking permitted without license from IHS -,-,-