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Lift Capacity Calculation Method Knuckle-Boom Log Loaders and Certain Forestry Equipment

MTC4, Forestry and Logging Equipment
  • Ground Vehicle Standard
  • J2417_202001
  • Current
Published 2020-01-10 by SAE International in United States
This SAE Standard provides a uniform method to calculate the lift capacity of knuckle-boom log loaders and certain forestry equipment. It establishes definitions and specifies machine conditions for calculations. This document applies to knuckle-boom log loaders as defined in ISO 6814 and ISO 17591 and certain forestry equipment defined in ISO 6814 that have a rotating upper-structure such as feller bunchers, forwarders, harvesters, and behind the cab or rear-mounted knuckle-boom log loaders not having their own power supply. It does not apply to harvesters that are incapable of lifting a tree or log completely off the ground. This document applies to those machines that are crawler, rubber-tired, and pedestal or stationary mounted.
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Coupling Assembly, Hydraulic Self Sealing, Quick Disconnect

G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
  • Aerospace Standard
  • AS1709B
  • Current
Published 2020-01-06 by SAE International in United States

This specification covers the requirements for aircraft, hydraulic, self-sealing, quick disconnect couplings, for use in Type II hydraulic systems (-65 to +275 °F temperature range) as defined by AS5440.

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Seamless, 304/304L Stainless Steel Tubing

Metallic Tubing Committee
  • Ground Vehicle Standard
  • J3129_201910
  • Current
Published 2019-10-14 by SAE International in United States
This SAE Standard covers seamless stainless steel pressure tubing intended for use as hydraulic lines and in other applications requiring corrosion resistance.
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Welded and Cold Drawn, 304/304L Stainless Steel Tubing

Metallic Tubing Committee
  • Ground Vehicle Standard
  • J3128_201910
  • Current
Published 2019-10-14 by SAE International in United States
This SAE Standard covers welded and drawn to size stainless steel pressure tubing intended for use as hydraulic lines and in other applications requiring corrosion resistance.
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High Strength, 304/304L Stainless Steel Tubing

Metallic Tubing Committee
  • Ground Vehicle Standard
  • J3135_201910
  • Current
Published 2019-10-14 by SAE International in United States
This SAE standard covers both “welded and cold drawn” and “seamless” stainless steel pressure tubing in the as-cold-drawn high strength condition intended for use as high pressure hydraulic lines and other applications requiring corrosion resistance. Welding, brazing, or other thermal processing methods that subject the tube material or assembly to elevated temperatures may compromise the strength of the tubing.
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Prediction of Hydraulic Cavitation Using 1D Simulation

John Deere India Pvt. Ltd.-Vinit Jawale, Ameya Bandekar
VJTI-Pritam Shinde, Addanki Rao
Published 2019-10-11 by SAE International in United States
Hydraulic Cavitation is, in many cases, an undesirable occurrence. It is the formation and collapse of air cavities in liquid. In hydraulic devices such as pumps, motors, etc. cavitation causes a great deal of noise, local erosion, damage to components, vibrations, increases oil contamination and a loss of efficiency. There is already established process of predicting cavitation using 3D simulation software. However, the model development is the time-consuming process as well as prediction process is component /subsystem level and cannot be done for various duty cycle operations at architecture level. That requires exploring our research in 1D simulation technique for prediction of cavitation. In this research, we have developed and implemented a methodology/mathematical model for the prediction of hydraulic cavitation in hydraulic system using a 1D simulation technique. For simulation purpose, we have taken an example of simple hydraulic system and predicted the cavitation in one of the component/subsystem of hydraulic system for ambient conditions. The mathematical model proposed based on mass transport equations of vapor, liquid and gas, Rayleigh-Plesset equations, Singhal model and bubble…
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Design of Light Weight Hydraulic Connecting Rod for Agricultural Tractor

Mahindra & Mahindra, Ltd.-Mahendra Dumpa, Solairaj Perumal, Dinesh Redkar, Maxson Gomes, Prasanna Balaji Subbaiyan
Published 2019-10-11 by SAE International in United States
Hydraulic power train assembly of an agricultural tractor is meant to controls the position and draft of the implement depending upon the type of crop, farming stage, implement type and soil conditions. These variations induce extreme range of loads on the hydraulic system, thus making it challenging to design these components. Hydraulic connecting rod is critical component of hydraulic power train assembly. Standards like IS12224, IS4468 governs the design of hydraulic power train components which regulates the test method for hydraulic power and lift capacity of the tractor.In this paper, a virtual simulation process has been established to design a hydraulic connecting rod to meet the requirements. The hydraulic connecting rod basically functions as a short load transferring link, which is subjected to the operating hydraulic pressure of the hydraulic lifting mechanism. The current circular connecting rod is higher in weight and cost. So, there is scope for optimizing the design of connecting rod. Virtual simulation has been done by performing (i) Multi body dynamics analysis (MBD) approach is used to predict the loads on…
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Rectangular Cross Section Polymeric Sealing Rings

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J2310_201910
  • Current
Published 2019-10-09 by SAE International in United States
The purpose of this SAE Recommended Practice is to establish guidelines for the automatic transmission and hydraulic systems engineer to design rectangular cross section seals for rotating and static grooved shaft applications. Also included are property comparisons of polymeric materials suitable for these applications. Historically, material covered in this document is not intended to include aluminum contact applications.
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Hydraulic Fluid Power Circuit Filtration - Application and Methods

CTTC C1, Hydraulic Systems
  • Ground Vehicle Standard
  • J931_201910
  • Current
Published 2019-10-02 by SAE International in United States
This SAE Information Report is primarily to familiarize the designer of hydraulic powered machinery with the necessity for oil filtration in the hydraulic power circuit, the degree of system cleanliness required, types of filtration and filters available, and their location and maintenance in the hydraulic circuit.
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Filter and Filter Element for Hydraulic System(s) Used on Manufacturing and Assembly Equipment

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2066_201910
  • Current
Published 2019-10-02 by SAE International in United States
This SAE Standard establishes a common specification and ordering code for hydraulic filter assemblies and hydraulic filter elements, and establishes minimum performance criteria and test methods. This document establishes two filter diameter sizes, five basic micron ratings, and two basic collapse ratings. These classifications will satisfy most hydraulic filter applications, and thereby can minimize inventory requirements for hydraulic filter elements.
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