1、ASTM D5005 87 m 0759530 0038579 7 m AMERICAN SOCIETY FOR TESTING AND MATERIALS 4Ib Designation:5005-1916 Race S I.Philadelphia.Pa.19103 Reprinted Irom lhe Annual ook o1 ASTM Slrndardr.Copytight ASTM If n a listed in the current combined index.will w a r in lhe next edition.An American National Stand
2、ard Standard Test Method for Evaluation of Fluids for Effects on Friction and Wear of Wet Clutches This standard is issued under the fixed designation D 5005;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.
3、A number in parentheses indicates the year oflast reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This test method evaluates fluids for effects on friction retention,capacity,and traction clutches utilizing fluid wetted friction surf
4、aces.1.2 The values stated in SI(metric)units are to be regarded as the standard.1.3 This standard may involve hazardous materials,oper-ations,and equipment.This standard does not purport to address all o f the safety problems associated with its use.It is the responsibility o f the user o f this st
5、andard to establish appropriate safety and health practices and determine the applicability o f regulatory limitations prior to use.For specific hazard statements,see 7.4 and 8.3.2.Referenced Document 2.1 ASTM Standard:D 235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleani
6、ng Solvent)3.Terminology 3.1 Descriptions o f Terms Specfic to This Standard:3.1.1 apply pressure-fluid pressure supplied to the hy-draulic clutch actuating mechanism that causes clutch en-gagement.3.1.2 hold position-a partially engaged condition where the clutch slips and does not transmit full en
7、gine r/min to the output shaft.3.1.3 stall test-a procedure for determining the length of time required to stop an internal combustion engine after a clutch application is made with a fixed output shaft.3.1.4 stall time-the time required for the tractor engine to stop when the power-take-off(PTO)clu
8、tch is engaged with a locked PTO shift.3.1.5 wear-the loss of friction material during the test.4.Summary of Test Method 4.1 A modified tractor is used in conducting this test method.The tractors power-take-off(PTO)shaft is con-nected to a load fixture.While the engine is running at wide open thrott
9、le,the PTO clutch is engaged in two steps while monitoring engine speed,PTO clutch apply pressure,and PTO shaft output torque.Periodic stall tests are conducted to determine the fluid dynamic friction characteristics.After This test method is under the jurisdiction of ASTM Committee D-2 on Petroleum
10、 Products and Lubricants and is the direct responsibility of Subcom-mittee W2.B on Automotive Lubricants.Current edi:ion approved Oct.27,1989.Published December 1989.Annual Book of ASTM Standards,Vol 06.03.2000 cycIes,the PTO clutch is inspected and measured.5.Significance and Use 5.1 This test meth
11、od measures the friction retention,capacity,and effects on clutch wear of fluids used in traction clutches of on-off highway equipment.5.2 This test method was developed for this purpose refemng to John Deere Standard JDQ42.3 6.Apparatus 6.1 A John Deere(JD)4250 tractor4 equipped with a quadrange tr
12、ansmission is required.6.2 External Fluid Cooling/Heating System-External systems are required to maintain proper operating tempera-tures for both engine and transmission fluids.Do not use brass or copper in the system that will come in contact with the test fluid.6.3 Load Absorption Equipment-The l
13、aboratory load fixture must be equipped as follows:6.3,1 Inertia Flywheel,(14.90 kgSm*).6.3.2 Hydraulic Brake,or equivalent,on the input shaft,(3.4 kN m torque capacity).6.3.2.1 Hydraulic Pump,capable of 15 L/min at 9.0 MPa,to provide hydraulic brake operations(if required).6.3.2.2 Manner of regulat
14、ing fixture system pressure(if required).6.3.2.3 Electric Solenoid Valve(normally open),con-nected to apply the brake pressure when de-energized and release the brake when energized(if required).6.3.3 Cooler,of sufficient capacity to maintain the fixture fluid temperature below 65C(if required).6.3.
15、4 Driveline Torquemeter,of 4000 Nom minimum capacity.6.3.5 Driveshafl,for connecting the tractor PTO to the load absorption equipment.6.4 Cycle Controls-A timer and mechanism to control the PTO clutch engagement.6.5 Recording Equipment-A means of recording PTO shaft torque simultaneously with PTO cl
16、utch pressure and.engine r/min.6.6 Measurement Equipment-A device capable of mea-suring friction disk thickness to 0.01 mm.7.Reagents and Materials 7.1 Parts Listing-A complete parts list is shown in Available from John Deere and Company,Corporate Standards,John Deere A product of John Deere and Company,John Deere Road,Molhe,IL 61265.Road,Molhe,I L 61265.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the l
