SAE J1334:2003 pdf download

SAE J1334:2003 pdf download Hydraulic Cylinder Integrity Test
. Scope—Applies to hydraulic cylinders which are components of self-propelled work Machines defined in SAE J111 6.
1.1 Purpose—To provide a laboratory method for determining the structural integrity of a double acting hydraulic cylinder. General seal performance is monitored during the cylinder cycle test.
2. References
2.1 Applicable Publications—The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest version of SAE Publications shall apply.
2.1.1 SAE P UBLICATIONS —Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.
SAE J1 116—Categories of Off-Road Work Machines
SAE J1 165—Reporting Cleanliness Levels of Hydraulic Fluids
SAE J1 176—External Leakage Classifications for Hydraulic Systems
SAE J1276—Standardized Fluid for Hydraulic Component tests
SAE J1 336—Hydraulic Cylinder Leakage Test
3. Definitions
3.1 Average Cylinder Rod Velocity—The sum of twice the stroke length divided by the sum of the movement time for the rod to extend and retract.
3.2 Cycle—One extension and retraction of the cylinder rod for a specified stroke length
3.3 Cycle Rate—The number of cycles per unit of time.
3.4 Proof Pressure—The maximum pressure which can be applied that will not cause any permanent set or deformation.
3.5 Rated Pressure—The continuous duty operating pressure specified by the manufacturer.
3.6 Rod Temperature—The temperature of the rod surface during or immediately after cycling. Record location and method of sampling.
3.7Side Load—A force which is in a direction, unless otherwise specified, perpendicular to the axial loading of the cylinder to simulate loading due to external forces on the cylinder as defined by the user.
3.8Specified Functional Life—The number of cycles a cylinder can withstand and continue to function as specified.
3.9Stroke Length-The total distance traveled by the piston in completing one-half cycle.
3.10 Cylinder Friction—Internal frictional force measured as the amount of pressure necessary to move the piston with all external (either mechanical or hydraulic) forces removed or in balance.
3.11 Specified Column Load—Maximum compressive load as specified by the test requester,including all appropriate Safety Factors required for the intended application.
3.12 Duty Cycle—The movement of the piston and rod from it’s starting point and return to ir’s original position.
The total number of duty cycles would be defined by the application and specified by the test requester.
4.Testing Conditions
4.1 Accuracy of Measurement—The accuracy of measurements,unless otherwise stated, shall be;
Temperature +3 C, Pressure +2%,Leakage ±2%，Time +2%, and Length :2%.
4.2Test Fluid—The test fluid shall be according to SAEJ1276 unless otherwise specified.
4.3Test Pressure一The operational test pressure shall be the manufacturer’s rated pressure and measured at the cylinder work ports. A 10% transient overshoot is permissible unless another amount is agreed upon by theuser.
4.4 Pressure Rise Rate—The pressure rise rate shall be a minimum of 150 MPa per second.
4.5 Contamination Level—The test system shall have a contamination level not to exceed SAEJ1165 ISO Code 17/14, or Solid Contaminant Code 19/16.
4.6 Stroke Length—The length of stroke for the cycle test procedure shall be equal to at least 15% of the maximum stroke length of the hydraulic cylinder.
4.7Cycle Rate-The cycle rate shall be as specified by the manufacturer.
4.8Specified Functional Life Rating一The specified functional life rating as specified by the manufacturer.
4.9 Proof Pressure一The proof pressure shall be as specified by the manufacturer or 200% of the rated pressure if none is specified.
5.Test Equipment—Use a suitable test fixture， for example， an oscillating beam type,a conventional in-linebeam type, or a similar fixture, in which the test cylinder can be loaded and driven in either direction under bothstatic and dynamic conditions.