Troubleshooting Challenge: Shaft Seal Fails on Pressure-Compensated Pump

A simple 2,000-psi hydraulic system was designed and installed to run a conveyor in a hog-processing plant (see schematic). Two belt conveyors at a vertical angle to each other create a V shape, with about a 12-in. gap at the bottom and about a 30-in. gap at the top. A flat floor at the bottom of the conveyor slopes down from the entrance. Hogs travel down single file into the conveyor. As they enter the conveyor, the sloping floor causes the hogs to be wedged in and carried to where they are dispatched, and processing begins.

The new system developed a problem with the C-face mounted pump shaft seal failing after six weeks or so. The seal lip with a garter spring was pushed out. The maintenance crew replaced the seal and was told by the power-unit builder that this type of failure was normally due to excessive pump case pressure. The crew installed a standard 0- to 300-psi pressure gauge teed into the case line to monitor case pressure.

They observed it for several hours, then every day for a week or two. They noticed that when the pump compensated each time the conveyor was stopped, the pressure would spike between 10 and 15 psi but then only read about 5 to 8 psi. When the directional valve was shifted to run the system, the pressure would drop even lower.

The pump shaft seal failed again five weeks later. The power-unit builder said case pressures this low shouldn’t cause these failures, but they did not know what could be causing the failures.

Do you have any ideas?

Read more: Troubleshooting Challenge: Shaft Seal Fails on Pressure-Compensated Pump

Hydraulic Valves Market: Global Industry Trends, Share, Size, Growth, Opportunity and Forecast 2019-2025

Hydraulic valves control the flow of fluid in a hydraulic machine; thereby, maintaining the required pressure in the system. These valves have spools that slide to different positions to control the flow of fluid. Based on application, directional valves, pressure valves, and flow valves are key types of hydraulic valves.

With a proliferating water and wastewater treatment industry, the market for hydraulic valves is anticipated to have a positive outlook over the next four years. Globally, there is an increased demand for uncontaminated and high-quality water for domestic consumption purposes. Advanced economies have the well-developed infrastructure for water production. However, they lack effective supply facilities, resulting in impurities polluting the water during conveyance. Moreover, in developing countries like India and China the majority of the population lack access to potable water. Moreover, government regulations on industrial wastewater disposal in APAC are almost negligible, which has led to the contamination of natural reservoirs. Such factors have led to increased investment in the water and wastewater treatment industry, which will, in turn, boost the demand for hydraulic valves over the next four years.

The APAC region dominated the global hydraulic valves market during 2017 and continue to lead the market over the next four years. An expanding population, increased urbanization, and the expanding middle class in the region have resulted in an augmented demand for oil and gas, electricity, and chemicals in emerging economies such as India, Indonesia, and China. Moreover, the increasing need for potable water in the region will result in the setting up of several wastewater treatment plants, which will drive this market’s growth in the region.

The global Hydraulic Valves market is valued at xx million US$ in 2018 is expected to reach xx million US$ by the end of 2025, growing at a CAGR of xx% during 2019-2025.

This report focuses on Hydraulic Valves volume and value at global level, regional level and company level. From a global perspective, this report represents overall Hydraulic Valves market size by analyzing historical data and future prospect. Regionally, this report focuses on several key regions: North America, Europe, China and Japan.

At company level, this report focuses on the production capacity, ex-factory price, revenue and market share for each manufacturer covered in this report.

Read more: Hydraulic Valves Market: Global Industry Trends, Share, Size, Growth, Opportunity and Forecast 2019-2025

Electro-Hydraulic Pump System reduces fuel costs on high-power lifting applications

The new integrated solution provides the opportunity to realise fuel cost savings of up to 50% and gives the potential for customers to downsize or remove the diesel engine, therefore creating an optimised, highly-efficient, completely electric vehicle.

There is a huge shift towards electrification across many areas of industry and society delivering environmental and sustainability as well as performance benefits. As a result, large numbers of OEMs are looking to tap into the technology which also supports improved maintainability, greater safety, and compliance with increasingly stringent emissions regulations.

Conventional solutions in this area work with coupled power distribution, where the engine is sized for peak demand with no energy storage or recovery capability. In addition, the efficiency (torque/speed operation) of the internal combustion engine (ICE) tends to be low.

With its EHPS, Parker has addressed a market need for decoupled loads and power distribution. This design concept facilitates far better engine management whereby energy storage and recovery functions can be introduced. With its separate drive train, the EHPS also offers high ICE efficiency via power point operation.

Parker’s system solution comprises motor and pump technology to recover energy while materials are being lowered – all controlled by a power inverter. Embedded Parker-derived software provides the system function and operational interface, while peripheral manifolds and system components deliver functionality to key services throughout the wider hydraulic system.

Read more: Electro-Hydraulic Pump System reduces fuel costs on high-power lifting applications

Global Aircraft Hydraulic System Market Research Key Players, Industry Overview, Supply Chain and Analysis to 2018 – 2025

Hydraulic system is a system where incompressible liquid is used to transmit energy. Aircraft hydraulic systems provide a mean for the operation of aircraft components such as landing gear, flaps, flight control surfaces, and brakes. The aircraft hydraulic system market is expected to show robust growth due to certain market determinants such as high reliability of hydraulic systems, less heat generation in hydraulic system, capacity to handle wide range of loads. However, the high maintenance cost of hydraulic systems renders a setback in the market growth.

“Aircraft Hydraulic System Market” report offers detailed insights on the market dynamic forces to enable knowledgeable business decision making, and the opportunities present within the market. The Aircraft Hydraulic System Market report offers an entire analysis of competitive dynamics that are modifying and places the patrons before competitors.

The case study is written down specified the clients and therefore the common person will simply get the gist of the Aircraft Hydraulic System Market report with a higher understanding of the long run scope, current market position, important growth factors, and geographical segmentation. The Aircraft Hydraulic System report evaluated key market features, as well as revenue, price, capacity, capability utilization rate, gross, production, production rate, consumption, import/export, supply/demand, cost, market share, CAGR, and ratio. Additionally, the study offers a comprehensive study of the key market dynamics and their latest trends, together with pertinent Aircraft Hydraulic System market segments and sub-segments. Based on product types, the Aircraft Hydraulic System market is categorized into:  Closed center hydraulic system, Open center hydraulic system.

Read more: Global Aircraft Hydraulic System Market Research Key Players, Industry Overview, Supply Chain and Analysis to 2018 – 2025


The astonishing production capability of modern agriculture can, in no small part, be attributed to the tractor. Once the internal combustion engine hit the farm, there was no turning back. Farms grew bigger, with farmers able to cover more ground faster. Cash crops replaced oats needed for horses. Family size became smaller as less labor was needed to farm.

Rural America was forever changed.

Today’s tractors are incredible, amazing, powerful feats of mechanical engineering and precision.

New innovations in tractor technology are coming out all the time. In other words, it’s not your grandpa’s tractor anymore. In 2018, equipment manufactures seemed to focus on combines. In 2019, their shift has turned to tractors. Sales are up nearly 5%, and the new models offer innovative possibilities.

CASE IH unveiled its AFS Connect Magnum series at the National Farm Machinery Show, with its updated exterior and cab design and improved precision technology.

Other manufacturers feature versatility to perform multiple operations around the farm, along with improved precision technology.

John Deere’s new 6230R and 6250R models focus on the needs of livestock and hay producers with an infinitely variable transmission (IVT) that allows the machine to accelerate quickly, haul heavy loads, and reach optimal transport speed in a hurry, making it perfect for baling and hauling hay. An improved factory-installed command center works smarter and adds to driver comfort.

John Deere also has updates to its largest lineup of tractors. The new John Deere 9R series offers 120-inch track spacing and 30- and 36-inch tracks to help reduce field compaction and increase stability on hilly ground. A new command center and software upgrade is geared toward saving fuel and allowing more acres to be covered in less time by reducing overlap. A hydraulic kit, in either factory or field installed versions, helps manage implements that require continuous hydraulic power. The kit is retrofittable on some older models.


Making Sense of Hydraulic Hose Standards

Hydraulic hose construction and performance is covered by various national and international standards including ISO, BSI, SAE, DIN, API, and CETOP. Most proprietary hoses conform to one standard or another, the SAE standards being the most widely followed in the U.S. SAE standards provide general, dimensional, and performance specifications for the most common hoses used in hydraulic systems on mobile and stationary equipment.

For decades, SAE J517 has published guidelines for 100R1 through 100R12 series hydraulic hoses. These manufacturer-driven SAE standards have been based on design, construction, and pressure ratings to ensure that hydraulic hoses meet minimum construction requirements. SAE established minimum pressure ratings for various hoses (inside diameters and were later revised to also include constant-pressure hoses, which are hoses that maintain pressure ratings within a group regardless of size). Some common constant-pressure hoses are R13, R15, R17 and R19.

Read more: Making Sense of Hydraulic Hose Standards

What Happens When Hydraulic Systems Get Too Much Sun?

Most of us are aware that prolonged exposure to the sun—especially in hot weather—can wreak havoc on rubber, polymers, and other synthetics, rendering them weak and brittle. But prolonged exposure to the sun can also cause problems inside a hydraulic system.

Hydraulic component failures from pressure overload have been reported in agricultural equipment, which often is left exposed to the sun for long periods when it is not being used. These pressure overloads can be above and beyond system relief valve settings, and they occur while equipment is shut down, rather than when it is operating. These seemingly improbable events result from thermal radiation absorptivity from prolonged exposure to the sun.

Many designers believe that system relief valves will prevent such heat-related high pressures from developing or that expansion of hydraulic hoses will absorb any pressure increases. They will, but many system designers do not specify relief valves in the implement because they rely on relief valves in the tractor’s hydraulic system.

Obviously, the problem is more complex. Through laboratory stress analysis of a failed component, the pressure that caused the failure can be computed. Working backward from that number, an analysis of the situation can be made.

A Typical Scenario
Let’s begin with this scenario: Assume the failed component came from an agricultural implement. The implement had been disconnected from the tractor on a fall day. It was a heavy implement that could trap 2,500 to 3,000 psi in its hydraulic system. Further assume that the ambient temperature was between 20° and 30°F on that fall day. If we know what the failure pressure is, and subtract the trapped pressure, what remains is the amount of pressure that would have to be generated by external sources to cause failure.

For this thermal-expansion problem, the bulk modulus of the fluid is a key factor. The bulk modulus for typical hydraulic oils ranges from 240,000 to 250,000 psi and varies with temperature. For this example, we’ll use an average value to get a useful indication of the possibility of thermally generated pressure increases.

Read more: What Happens When Hydraulic Systems Get Too Much Sun?

First-person digger: Stanley Black & Decker’s game controller for excavators

In a parking lot at an industrial and office park just outside Baltimore, I took an excavator for a spin. I pushed around some cinder blocks with a leveling blade, nosed them around with the excavator’s shovel, and maneuvered the heavy metal beast around to make room for an incoming tractor-trailer. And I did all of this with a wireless controller that was almost identical to the one I used to play Forza the night before.

The excavator was configured with a prototype of the Remote Operated Control (ROC) System from Stanley Black & Decker’s Infrastructure Innovation unit—a bolt-on remote control system that allows heavy machinery from major manufacturers to be operated either from in the cab as usual or with a wireless game-style controller.

Stanley is currently recruiting contracting companies to act as beta testers for the technology, which is currently being targeted at Bobcat, CAT, Kubota, and John Deere excavators under 10 tons. The remote control kit can be installed in existing excavators in about 5 hours by someone with little to no mechanical experience. And the control system has a physical switch that allows an operator to quickly switch back and forth between local and remote control.

Read more: First-person digger: Stanley Black & Decker’s game controller for excavators

Global Hydraulic Fluid Connector Market to Witness Heightened Growth During the Period 2018 – 2028

Hydraulic Fluid Connector Market: Introduction

Hydraulic fluid connectors are used only in fluid power and piping systems for efficient operation in industrial fluid networks. A hydraulic fluid connector is deployed in these systems to increase the total machine performance irrespective of applications. Hydraulic fluid connectors are used to enhance uptime in the remote applications such as oil and gas drilling, pipeline installation and mining.

Innovations in the offering of tearout-proof technology for hydraulic fluid connectors has increased the safety of the entire fluid system. Developments in hydraulic fluid connectors in terms of advanced rubber compounds to withstand extreme and rigorous thermal applications is driving the hydraulic fluid connector market. The manufacturers of hydraulic fluid connectors are constantly investing in research and development to sustain in the competitive hydraulic fluid connector market.

Hydraulic Fluid Connector Market: Dynamics

Some of the major challenges faced by hydraulic fluid connectors or defective connectors include the presence of flaws, dirt or other foreign objects. The periodic maintenance and replacing hydraulic fluid connectors during leakage will support the flow of operations. The installation of hydraulic fluid connectors based on the assembly instructions will support the flow of liquid under varying pressure.

The rising industrial activities in remote operations where heavy-duty vehicles are used in the mining, construction and material handling applications are driving the hydraulic fluid connector market. Increase in the sales of off-highway vehicles, such as earth movers, cranes and lift vehicles, is driving the hydraulic fluid connector market. The global hydraulic fluid connector market is witnessing a steady growth trend, which is expected to continue during the forecast period.

Hydraulic Fluid Connector Market: Segmentation

The global hydraulic fluid connector market can be segmented into product type, material type and application.,,On the basis of product type, the global hydraulic fluid connector market is segmented into:,,Hydraulic hose,Coupling,Adaptors,Other accessories,On the basis of material type, the global hydraulic fluid connector market is segmented into:,,Steel,Stainless steel,Aluminum,Brass,Thermoplastic,Rubber,On the basis of application, the global hydraulic fluid connector market is segmented into:,,Oil and gas,Energy,Automotive,Mining,Manufacturing,Material handling and logistics,Construction,Agriculture,Others

Hydraulic Fluid Connector Market: Regional Outlook

Asia Pacific and North America are holding a competitive market share in the hydraulic fluid connector market as compared to other regions. Growing investments in the oil and gas industry in the U.S., Russia, China, India and the gulf countries are the key end user of hydraulic fluid connector. Increase in the transportation of oil & gas via pipelines from one country to another, transcontinental pipeline projects and remote operations are among factors driving the hydraulic fluid connector market. During the forecast period, the Asia Pacific region is expected to register a strong growth rate in the global hydraulic fluid connector market.

Read more: Global Hydraulic Fluid Connector Market to Witness Heightened Growth During the Period 2018 – 2028

Electric Automotive Test System Provides an Alternative to Hydraulics

Motion control company, Moog, has developed a compact electric multi-axis system that allows auto makers to test components such as seatbelt anchors in a lab setting. Most automotive component makers currently rely on hydraulic systems for testing assemblies. Yet growing concerns about reliability, maintenance, and safety with older hydraulic test systems have led some carmakers to look for alternative test rigs.

Automotive electric test systems, automotive hydraulic test systems, Moog, servo motors

Moog’s engineers designed the electric test system’s actuators to remain stable during use and arranged the harnesses in a way that eliminates interference with the actuators in any position. (Source: Moog)

Moog representatives pointed to some of the specific problems carmakers cite with their hydraulic test systems:

  • Many are large and respond slowly
  • They leak oil and create environmental issues
  • Many of the systems require a complex infrastructure, including a cooling tower

Moog developed an electric system built on recent technology. Prior to advances in servo motors, the hydraulic system was the only choice. “People traditionally did hydraulics because it’s a known technology,” Craig Lukomski, manager for solutions commercialization, simulation, and test, at Moog, told Design News. “Electric test systems have become more prevalent in the last five years. Things have changed in electric. Servo motors offer competitive cost, and the technology has matured in recent years.”

Read more: Electric Automotive Test System Provides an Alternative to Hydraulics