1、SAE-J765ADOPTION NOTICESAE-J765, “CRANE LOAD STABILITY TEST CODE“, was adopted on03-OCT-94 for use by the Department of Defense (DoD). Proposedchanges by DoD activities must be submitted to the DoD AdoptingActivity: WR-ALC/TILCC, 255 Second Street, Suite 122, Robins AFB,GA 31098-1640. Copies of this
2、 document may be purchased from theSociety of Automotive Engineers 400 Commonwealth DriveWarrendale, Pennsylvania, United States, 15096-0001. http:/www.sae.org/_Custodians: Adopting Activity:Air Force - 84Army - CR4Navy - YDAir Force - 99FSC 3810DISTRIBUTION STATEMENT A: Approved for public release;
3、 distributionis unlimited.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engine
4、ering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be
5、reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1990 Society of Automotive Engineers, Inc.
6、All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001STANDARDAn American National StandardJ765REV.OCT90Issued 1961-04Revised 1990-10Superseding J765 OCT80(R) CRANE LOAD STABILITY TEST CODE1. ScopeThis SAE Standard may be used for all revolving cranes w
7、herein the capacity of the crane to supportloads is based on its resistance to overturning. It is not applicable to cranes wherein the capacity of the craneis based on structural strength or available hoisting power.1.1 PurposeThe purpose of this test is to determine the maximum capacity of a crane
8、to counterbalance loadsapplied on its hook block. The capacity of the crane is reported in terms of the load in kilograms (pounds) andits corresponding radius in meters (feet) for a specified position of the upperstructure with respect to themounting.2. References2.1 Applicable PublicationsThere are
9、 no referenced publications specified herein.3. Definitions3.1 Balance PointThe condition of crane loading wherein the load moment acting to overturn the crane is equalto the maximum moment of the crane available to resist overturning. On wheel mounted cranes wherebalance loads are supported over an
10、 end of the mounting equipped with free-oscillating dual axles, thebalance point, without outriggers set, is determined with the oscillating center of the axles or “bogie axle“functioning as the fulcrum.3.2 Axis of RotationA vertical line through the axis around which the crane upperstructure rotate
11、s, before loadis applied to the crane hook.3.3 LoadThe force acting to unbalance a crane; it results from the gravitational force created by hook block andall items suspended from the hook block.3.4 Radius of LoadThe horizontal distance from a projection of the axis of rotation to the supporting sur
12、face,before loading, to the center of vertical hoist line or tackle with load applied.3.5 SpecifiedThe term specified, where used herein, is construed to mean the recommendation of themanufacturer, the user, the testing agency or any agreement between these parties.4. LimitationsThese test methods s
13、hould be used only for those load ratings which are based on stabilityfactors and are not applicable to those ratings which are based on structural competence. The tester shouldtake care to assure that tests are made only in the least stable direction for the rating under test.Copyright SAE Internat
14、ional Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J765 Revised OCT90-2-5. MethodsThe load is applied by freely suspending weight of predetermined magnitude and adjusting itsposition horizontally.6. Facilities6.1 Apparatus
15、 and Materials6.1.1 A concrete or other firm supporting surface, sufficiently large to provide for unobstructed accomplishment ofthe tests required.6.1.2 Means for determining the load radius to an accuracy of 1%, not to exceed 0.15 m (6 in).6.1.3 TIRE PRESSURE GAGEAccuracy 3% of measured pressure.6
16、.1.4 Means for projecting the crane axis of rotation to the test course surface.6.1.5 Means for measuring the horizontal distance from the axis of rotation to the center of gravity of the load.6.1.6 Means for determining the weight of test weights, hook block slings, and other auxiliary equipment: a
17、ccuracy1/2% of measured load.6.1.7 Test weights and lifting apparatus of known weight, accurate to within 1%.7. Procedure7.1 Set Up7.1.1 Service and adjust the crane as applicable to assure specified conditions of:a. Lubricationb. Fuel supplyc. Tire inflationd. Coolant supplye. Track tensionf. Bolts
18、, pins, cable fittings, and other load bearing componentsg. Clutches, brakes, and other power transmission componentsh. Boom length and riggingi. Crane level to within a 1% grade7.1.2 Operate the crane under partial load sufficiently long to assure operator proficiency and proper machinefunction. In
19、 the absence of specific recommendations, a new machine should be operated for at least 4 h.Service and adjust the machine to specified tolerances at conclusion of this initial operation.7.1.3 Locate the crane on the test course in position for loading and lock the travel brakes.7.1.4 Set outriggers
20、, if used, and jack the crane to a position where the tires or tracks within the boundary of theoutriggers are unloaded.7.1.5 Vertically project the upperstructure axis-of-rotation to the surface of the test course and mark its location.7.2 Test Methods7.2.1 Prepare test load including test weights,
21、 hook block, slings, and other auxiliary equipment, such as loadbasket, that make up the specified load weight within 1%. Record this value.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J765 Revi
22、sed OCT90-3-7.2.2 With the crane upperstructure in the specified position, hoist the load free of test surface at a radius wherethe crane is stable; then boom down a small amount to increase the radius. Keep the load within 0.1 m(3.9in) of the test surface at all times to prevent excessive tipping.
23、If the crane will support the load at theadjusted radius, measure and record the new radius. Repeat the procedure until the balance point isreached. The balance point on outriggers is exceeded when the radius continues to increase with nocorresponding boom movement. The final adjustment of the balan
24、ce point may be made by adding smallincrements of weight rather than increasing the radius. When the balance point is reached, the load andradius of the crane shall be recorded.7.2.3 Alternately measure the radius of load and add a 10 lb increment to the load until the load overcomes thestability of
25、 the crane. The radius of load and load weight last obtained, before the load overcame the stabilityof the crane, shall be recorded as the balance point condition.7.2.4 Wind direction should be such that it does not increase the stability of the crane.8. Computations and Records8.1 Capacity CurveWhe
26、re it is desired to determine the balance point capacity of a crane throughout a range ofloads or radii, follow procedures as outlined for individual determinations, making sure that load and radius aredetermined for each extreme of the range and at a sufficient number of intermediate points to perm
27、it plotting acurve. Plot a curve showing the maximum capacity of the crane with the load in kilograms (pounds) asordinate and radii in meters (feet) as abscissa. Use a representative number of boom lengths for a givencapacity chart.8.2 Test RecordsRecord a description of the crane, positions for tes
28、t, load data, and radius of load data on thePhysical Dimensions Test Summary sheets Figure 1, Figure 2, and Figure 3.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J765 Revised OCT90-4-FIGURE 1PAG
29、E 1 OF TEST SUMMARYCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J765 Revised OCT90-5-FIGURE 2PAGE 2 OF TEST SUMMARYCopyright SAE International Provided by IHS under license with SAENot for Resal
30、eNo reproduction or networking permitted without license from IHS-,-SAE J765 Revised OCT90-6-FIGURE 3PAGE 3 OF TEST SUMMARYCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J765 Revised OCT90-7-9. No
31、tes9.1 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 indicates a complete revision of the report.PREPARED B
32、Y THE SAE OFF-ROAD MACHINERY TECHNICAL COMMITTESUBCOMMITTEE 32 Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J765 Revised OCT90RationaleNot applicable.Relationship of SAE Standard to ISO Standard
33、Not applicable.ApplicationThis SAE Standard may be used for all revolving cranes wherein the capacity of the crane tosupport loads is based on its resistance to overturning. It is not applicable to cranes wherein thecapacity of the crane is based on structural strength or available hoisting power.Re
34、ference SectionThere are no referenced publications specified herein.Developed by the SAE Off-Road Machinery Technical CommitteeSubcommittee 32Sponsored by the SAE Off-Road Machinery Technical CommitteeCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-
