Improve your haul cycles

Haul road design, construction, and maintenance have a huge impact on truck haulage cycle efficiency, costs, and production. Design factors, including road materials, grades, curve designs, and traffic layout, play critical rolls in efficient truck haulage. But proper maintenance of roads — to ensure smooth surface conditions, low rolling resistance, and consistent grades — is equally important to achieving lowest cost per ton of material hauled.

As an example of the importance of haul road design and maintenance, a 5-percent increase in rolling resistance can result in as much as a 10-percent decrease in production and 35-percent increase in production cost. Though 5-percent rolling resistance doesn’t sound like much, it is equivalent to about 2 inches of tire penetration.

Good haul road design, construction, and maintenance reduce fuel burn, help minimize tire heating and damage, and reduce wear on truck components. The results are lower operating and maintenance costs and less downtime.

Motor graders play critical role

Motor graders are not only critical to maintaining haul roads, but also to building haul roads to the right specifications, which, in turn, enables the roads to resist damage and provide optimum hauling conditions for longer periods.

Motor graders are the best grading machines for ensuring that cross slopes and cross falls are built to specifications. Building to spec helps ensure that roads drain water efficiently, which reduces the formation of potholes and washboards, and reduces the need for frequent haul road maintenance.

Motor graders are also the best machines for building superelevated curves. Such curves help trucks maintain proper weight distribution and constant speed, reducing the frequency of transmission gear shifts and braking for less wear on truck components.

After roads are built, the motor grader is the most efficient tool to keep them in good condition. Motor graders provide smooth roads, constant grades, and reduced rolling resistance. They also can maintain safety berms and drainage ditches, and, with their fast travel speeds, graders can be dispatched to quickly clean up rock spillage from haul trucks.

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Aircraft Hydraulic System Market Overview, Leading Companies, Types, Applications and Forecast 2025 in Global Industry

The Aircraft Hydraulic System market report provides deep insights into demand forecasts, market trends, and micro and macro indicators. In addition, the Aircraft Hydraulic System market report provides insights into the factors that are driving and restraining the demand for the application security market. Moreover, the study highlights current market trends and offers a forecast. The market report also has highlighted future trends in the application security market that will impact the demand during the forecast period. Moreover, the competitive analysis of the Aircraft Hydraulic System market brings insight into the product usability profiles of the leading players. Additionally, this report analysis highlights features & pricing, informant reviews of the key products in the market.

Additionally, the report underlines Aircraft Hydraulic System market growth influential factors such as upcoming business opportunities, scope, challenges, technological advancements, industrial policies, geographical and climatic conditions, and raw material resource availability. Furthermore, the report highlights an extensive analysis of growth constraining factors which includes market threats, obstacles, international inflations, environmental impacts, and provincial government intervention.

Target Audience:

* Aircraft Hydraulic System and Related Manufacturing Industries

* Suppliers and Traders of Aircraft Hydraulic System

* Research institutes, organizations, and consulting companies

Report Highlights:

Global Aircraft Hydraulic System market report provides a detailed analysis on current and future market trends to identify the investment opportunities

Using estimated market values as the base numbers, market forecasts till 2025.

Leading market trends across the business segments, Regions and Countries

Major developments and strategies observed in the market

Extensive market Dynamics such as Drivers, Restraints, Opportunities and other trends comprehensive company profiles of key players and upcoming prominent players

Growth prospects among the emerging nations through 2025

Market opportunities and recommendations for new investments

In the end, the Aircraft Hydraulic System Market report includes future investment analysis and development trend analysis. The pivotal soaring opportunities of the fastest growing worldwide Aircraft Hydraulic System market segments are glazed in all this report. This business report also comprises developing an approach, cost structure, product specification and production is elucidated by types, regions, technological advancements and applications.

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5.6% CAGR to take Global Hydraulic Accumulator Market to 1910 Million US$ by 2025

Global Hydraulic Accumulator analyzes the market status, market share, growth rate, future trends, market drivers, opportunities, challenges, risks, entry barriers, sales channels, distributors and Porter’s Five Forces.

Hydraulic accumulator is an important energy storage apparatus in hydraulic systems. A hydraulic accumulator enables a hydraulic system to cope with extremes of demand using a less powerful pump.

With the help of hydraulic accumulator, hydraulic system and machines can respond more quickly to a temporary demand. Hydraulic accumulator is widely used in general hydraulic systems, engineering machinery and machine tools etc.

The hydraulic accumulator industry has great development prospects and will keep a steady growth rate in the following few years. We are still optimistic about the hydraulic accumulator market in the next 5 years.

And it is predicted that the global hydraulic accumulator market will remain growth rate of more than 3.0%. The data will be 5.0% for China hydraulic accumulator market.

The Hydraulic Accumulator market was valued at 1230 Million US$ in 2018 and is projected to reach 1910 Million US$ by 2025, at a CAGR of 5.6% during the forecast period. In this study, 2018 has been considered as the base year and 2019 to 2025 as the forecast period to estimate the market size for Hydraulic Accumulator.

Key companies profiled in this report are Bosch Rexroth, Eaton, Parker, Hydac, Freudenberg Sealing Technologies, Nok, Roth Hydraulics, Pmc Hydraulics, Buccma, Nacol, Hydro Leduc, Hawe Hydraulik, Hydratech, Xunjie Hydraulic, Accumulator Inc, Stauff, Aolaier Hydraulic, Servi Fluid Power, Ponar S.A. and more. Each of this company is profiled in the terms of company basic details, revenue, gross margin, product description, recent developments, etc.

Read more: 5.6% CAGR to take Global Hydraulic Accumulator Market to 1910 Million US$ by 2025

Hydraulic Actuators Handle Heavy Doors

Hydraulic systems are often the first choice for opening and closing gigantic one-piece doors used on airplane hangars, agricultural buildings, and structures requiring large openings. Sometimes exceeding 100 ft. in width and weighing well over 10,000 lb., these doors need powerful mechanisms to operate smoothly and dependably. Hydraulic power is ideal and adaptable to any size door by increasing cylinder size in proportion to door size and weight.

One-piece doors are preferable in these applications because they swing up and away from the building, and their operation is simple. They do not protrude inside the structure like roll-up doors, which can reduce headroom. Bifold doors, on the other hand, pivot outward as they are raised. This feature presents a different set of advantages and disadvantages. Because bifold doors lift from the bottom, lifting force can be distributed across the width of the door. An electromechanical drive is generally used for these doors, but because one-piece doors must be pivoted from both sides, hydraulics is generally used.

A big advantage of the one-piece doors is that they provide a large, shaded canopy outside the building when open. With hydraulic power, the doors can be clad with almost any material, including heavy glass and steel siding. Entire storefronts have been incorporated into door designs.

Smart Hydraulic Design

Schweiss Doors, Hector, Minn., offers both types and has developed design features specifically addressed to improve hydraulic door operation over other designs. At the heart of the company’s system is a hydraulic gear pump driven by an electric motor ranging in size from 2 to 20 hp. The complete hydraulic power unit (HPU) is a compact package that can be mounted anywhere in a building, whether on the floor or a wall close to the door or farther away.

UL-listed electrical components are housed in control boxes, including contactors, transformers, relays, motor timers, rectifiers, and control fuses. The gear pump is 95% efficient and operates quietly at 1,800 rpm. The HPU also incorporates a 3,000-psi pressure gauge, fluid temperature gauges, and a service filter.

Structural features include a proprietary hinge design that provides considerably greater surface area than standard hinges for distributing the load of the moving door evenly. The patented hinges each feature four connection points, with grease-lubrication and removable hinge pins for extended service life. Spherical bearings connecting cylinders on each side of the door to the door frame and the building accommodate horizontal movement or deflection. They also allow for flexibility of the door and frame without binding on the cylinder pins and brackets.

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Caterpillar introduces Next Gen excavators and more new equipment

Caterpillar introduces the Next Gen 336 and 336 GC excavators, designed to balance productivity with lower fuel consumption and maintenance costs. Integrated Cat Connect Technology is said to increase operating efficiency by up to 45 percent over traditional grading operations. The standard Cat Grade with 2D system provides guidance for depth, slope, and horizontal distance to grade through the standard touchscreen monitor. Standard Grade Assist automates boom, stick, and bucket movements so operators can stay on grade with single-lever digging. Cat Payload precision makes loading more efficient, while an E-fence feature prevents the machine from moving outside operator-defined set points. The 336 is up to 15 percent more fuel efficient than the machine it replaces. With extended and more synchronized service intervals, the excavators can also lower maintenance costs by 15 percent over prior models; for example, the new air filter has double the dust-holding capacity over the earlier design. Three cab packages are available to keep operators comfortable. All include standard features such as keyless push-button start and touchscreen monitor.

Read more: Caterpillar introduces Next Gen excavators and more new equipment


Specifying the Right Hydraulic Cylinder for the Right Job

Hydraulic cylinders essentially convert fluid pressure and flow into force and linear motion. They are available in a wide range of styles, sizes, materials, and configurations. Many OEM engineers play it safe by over-engineering cylinder specifications. But less can sometimes be more when it comes to complex hydraulics. Let’s first identify some of the key factors that should be considered when specifying hydraulic cylinders.

Design Factors for Hydraulic Cylinders

Specifying hydraulic cylinders is essentially a balancing act or a cascade of compromises, as each design factor influences one or more of the other design factors. Designers must weigh each positive effect against potential negatives to get the best performance. Here ‘s a concise look at those factors:

Capacity. Most industrial hydraulics are considered medium-duty and operate at 1,000 psi. Heavy-duty hydraulics, which are common in presses and automotive machinery applications, can handle pressures up to 3,000 psi. If loads are extremely high, tandem cylinders are preferred to larger-bore or custom high-pressure cylinder designs.

Stroking distance. Stroke distances can exceed 10 ft (5.05 m) for custom-built cylinders, but pressure ratings can be a problem with such long strokes. The rod diameter needs to be determined in order to gauge its ability to handle the load. If necessary, a pressure rating on load in thrust (push mode) must be specified. In horizontal applications, which are common, premature rod bearing wear can lead to rod sag over long strokes. Although custom stroke distances above 10 ft (3.05 m) are possible, pressure rating can be a concern.

Speed. Every application engineer has their own definition of “excessive speed.” A good rule of thumb is that standard hydraulic cylinder seals can easily handle speeds up to 3.28 ft/sec. (1 m/sec.). The tolerance threshold for standard cushions is roughly two-thirds of that speed. Standard low-friction seals are often a better choice for high-speed applications, but what you gain in one aspect of performance you lose in another. The higher the fluid velocity, the higher the fl

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Hydraulics Technology is Alive and Well, Thank You

Rumors of fluid power’s death have been greatly exaggerated. To the contrary, electronic control and more-sophisticated components have advanced hydraulic power transmission far beyond its state of the art from only a few years ago.

I have been doing hydraulic motion control projects for 35 years. During that time, I have seen pundits predict the imminent demise of the hydraulic industry. So why hasn’t it happened? The answer is simple. Advances in hydraulic technology and training have allowed the inherent benefits of hydraulics versus other means of powering machines and mobile equipment to be demonstrated in real applications.

Two decades ago I was sitting in front of a major hydraulic company’s vice president of valves. The vice president didn’t seem to be all that interested in servo control because it was less than 5% of his company’s total business. He also deemed servo control as a little risky. Some people might have been discouraged about that, but it was obvious an opportunity existed to increase that percentage by replacing traditional on-off hydraulic valves with computer-controlled hydraulics.

Need for Better Control
The opportunity seemed clear. In essence, replace old open-loop “bang-bang” systems with hydraulic servo controls that could execute all the commands a servo motor controller could and move with the same precision. This was a lofty goal because feedback from magnetostrictive displacement transducers (MDTs) in the mid-1990s provided only about 0.001-in. resolution. Servomotors using encoders could achieve better than 0.001-in. resolution. However, hydraulic servo controllers now can use the same feedback devices as servo motors can. The playing field has been leveled. MDTs with 1.0 µm resolution are now the norm—and if they aren’t, they should be!

Back in the 1980s, one of my first hydraulic “control” applications had to move a block of wood into position at a lumber mill. One high-speed valve and one low-speed valve were controlled by two digital outputs. The operation was simple enough:

Read more: Hydraulics Technology is Alive and Well, Thank You

New Bobcat Bob-Dock System is Designed for Repeatable Hydraulic Connections

Bobcat Company introduces the new Bobcat® Bob-Dock™ system – a cutting edge, hands-free hydraulic attachment mounting system. The Bob-Dock mounting system is designed for strong, easy and repeatable hydraulic connections, without operators leaving the Bobcat compact loader cab.

The Bob-Dock system will be available for M2-Series T630, T650, T740 and T770 compact track loaders; S630, S650, S740 and S770 skid-steer loaders; and the A770 all-wheel steer loader.

“Fleet owners, equipment managers and operators who worry about machine downtime will love the Bob-Dock mounting system because it prevents many common operator errors, like failing to disconnect hydraulic hoses before backing away from an attachment, and the system routes and protects auxiliary hydraulic hoses from tire and track contact,” says Jason Boerger, Bobcat Company marketing manager. “The Bob-Dock system is also going to be a favorite of operators who will appreciate not having to leave their cabs to connect or disconnect hydraulic hoses.”

How it works

To connect an attachment to a compact loader equipped with the Bob-Dock system, an operator lines up the loader with the attachment’s Bob-Dock adapter plate. The operator then presses the Power Bob-Tach® switch inside the cab. The Bob-Tach system secures the attachment, while the Bob-Dock system automatically connects the hydraulics. The attachment is then ready to use.

When you’re done using the attachment, retract the Bob-Tach wedges and pull away. The hydraulics instantly release, providing simple, hands-free removal.

Versatile and made for easy use

If a loader has a Bob-Dock attachment mounting system installed, and the operator wants to use an attachment that lacks a Bob-Dock adapter plate, it’s no problem. While the Bob-Dock™ attachment mounting system’s floating coupler block equips your loader with a hands-free connection point, the standard couplers located on the lift arm remain ready to use. You can utilize the full lineup of approved Bobcat attachments – with or without the Bob-Dock adapter plate attached.

Read more: New Bobcat Bob-Dock System is Designed for Repeatable Hydraulic Connections


I personally have a love-hate relationship with valve lash adjustment. I love adjusting anything mechanical, getting my hands on it and fine-tuning it to perfection.

The part that I hate is how awkward, burdensome, and complex it often is to get to the lash adjustment. It seems that half of the engine and its accessories need to be removed to perform a 10-minute valve lash.

For this reason, I like engines with hydraulic valve lifters that, for the most part, require no adjustment. If the valve cover never has to come off an engine, that is a good day for me.

There are times when the hydraulic valve lifter needs to be adjusted. But instead of setting lash (as you would with a solid or mechanical valve lifter), a hydraulic system needs to have the preload set since there is no lash. This is usually only required if the cylinder head has been removed and is now being reinstalled.

The camshaft in an engine is responsible for the timing, lift, and the duration the valves stay open and closed. To accomplish this, it works through the intermediate components of the valve lifter (or tappet), pushrod, and rocker arm (in a cam-in-block engine).

With an overhead cam design, the intermediate components are different using some style of follower in lieu of a pushrod and possibly a tappet. This guide will be focused on a hydraulic tappet employed in an engine that has the camshaft in the block.


Matching Seals to Dynamic Sealing Applications

Successful sealing of fluid power cylinders requires a delicate balance of interrelated factors that affect the sealing process in a dynamic system. These factors include lubrication and mating surfaces; design factors, such as shape, material, and process; and environmental factors, such as pressure, temperature, time, dynamics, and assembly.

Understanding the role of lubrication is the first key to successful sealing in dynamic systems. A fully lubricated system will experience some leakage, usually in the form of a fluid film, but friction will decrease, leading to a corresponding decrease in seal wear. Not surprisingly, the opposite is true: In a sparsely lubricated system, the fluid film decreases, but friction—and thus, wear—increase.

Moreover, sealing tends to improve as fluid pressures increase. Because system pressure on the seal surface compresses the seal axially, the seal is forced more tightly into the gland, improving conformability of the seal with the metal surfaces around it. If the seal is correctly designed, as system pressure increases, sealing force and effectiveness also increase.

A seal’s ability to resist extrusion is a third key factor. Seals in dynamic systems must resist shear forces resulting from the differential between the pressurized and unpressurized sides of the seal. Shear forces tend to push the seal into the gap between adjacent metal surfaces (known as the clearance gap), and the seal material and profile must be sufficiently strong and stiff to resist being damaged or destroyed.

Rod Sealing
Leak-free performance and high service life cannot be ensured by a single sealing element in heavy-duty applications. Because the cylinder’s piston rod is directly exposed to the environment, it’s paramount that the seals keep the fluid in the system. External leakage is easily noticed. Not surprisingly, then, it has become a common criticism of hydraulic power transmission.

Read more: Matching Seals to Dynamic Sealing Applications