SAE J1334 pdf download
SAE J1334 pdf download.(R) Hydraulic Cylinder Integrity Test.
1. Applies to hydraulic cylinders which are components of self-propelled work Machines defined in SAE J1116.
1.1 Purpose—To provide a laboratory method for delerniining the structural integrity of a double acting hydraulK 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 PUBUCA11ONS—AvaiLable from SAE, 400 CommonweaLth Drive, Warrendale, 15096-0001
SAE J1116—CategorIes of Off-Road Work Machines
SAE J1165—lReporting Cleanliness Levels of Hydraulic Fluids
SAE J1176—External Leakage Classifications for Hydraulic Systems
SAE J1276—Standard,zed Fluid for Hydraulic Component tests
SAE J1336—l-lydraulic 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.
32 Cycle—One extension and retraction of the cylinder rod tot 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 afier cycling. Record location and method of sampling.
3.7 Side 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.
3.8 SpecIfied Functional Life—The number of cycles a cylinder can withstand and continue to function as specified.
3.9 Stroke Length—The total distance traveled by the piston in completing one-half cycle.
3.10 Cylinder Friction—Internal frichonal 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. mclud.ng 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 It’s onginal position. The total number of duty cydes 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:
Temperalure ±3 °C, Pressure ±2%, Leakage ±2%, TIme ±2%, and Length ±2%.
4.2 Test Fluid-The test fluid shall be according to SAE J1276 unless otherwise specified.
4.3 Test Pressure—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 the user.
44 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 SAE Ji 165 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.
4.7 Cycle Rate—The cycle rate shall be as specified by the manufacturer.
4.8 Specified Functional Life Rating—The specified functional life rating as specified by the manufacturer.
4.9 Proof Pressure—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-line beam type, or a similar fixture, in which the test cylinder can be loaded and driven in either direction under both static and dynamic conditions.
6. Suckling Test (See Figure 1)—The test cylinder shall be specially prepared to represent a working unit. I.E., while fully extended and supported on pins at end olnts. Apply the specified column load to the extended piston rod. The load must be gradually applied and radial deflection should be measured at 20% intervals of the specified column load requirements. (See Figure 1.)
