Atlas Copco Construction Tools LLC offers a complete line of hydraulic handheld breakers, providing an ideal solution for jobs in concrete, asphalt, frozen soil, mortar & brickwork.
The line includes the 46 pound LH 22. Able to produce 62.7 foot-pounds of blow energy at an average impact rate of 1,740 blows-per-minute, the breaker has a slim design that provides a clear view for the operator.
The LH 22 is equipped with basic vibration dampening. A more ergonomically advanced version, the LH 23 E, features a patented four-spring E-handle (ergonomic) that further reduces vibration levels, improves the breaker’s durability & decreases operator fatigue. The LH 23 E produces the same results as the standard LH 22 model, but reduces vibrations by up to 71 percent.
The LH 22/23 E can operate with a hydraulic oil flow of 5.3 or 7.9 gallons per minute. Optimum operation is achieved when powered by a carrier with hydraulic capabilities or by two of a wide range of Atlas Copco hydraulic power packs. These packs feature a power-on-demand process that automatically decreases the pack’s engine speed when the gizmo is disengaged, reducing fuel consumption & extending the life of the power pack. Equipped with wheels & handles, a power pack can be easily moved around a job site to increase the breaker’s flexibility. The breaker & power pack are small to transport by pickup van & store on a shelf when not in use.
The breaker comes standard with a 1.3-foot hydraulic twin hose, which is complete with screw couplings for connection to the breaker & flat-face quick-release couplings for connection to the power pack hose or to the twin extension hose. An optional oil flow divider & extension hoses are obtainable for walking the breaker off hydraulic-powered carriers.
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Atlas Copco Construction Tools LLC announces the addition of the HB 10000 to its line of heavy hydraulic breaker attachments. Based on AEM impact energy ratings, the HB 10000 is the most powerful production series breaker in the world, capturing the title previously held by Atlas Copco’s HB 7000.
Weighing in at 10 metric tons, the HB 10000 delivers 50-percent more power than the HB 7000. The sheer size and power of the HB 10000 represent a major step toward the use of hydraulic breakers as cost-effective production machines for primary rock breaking, and as a viable alternative to certain drilling and blasting applications. The new breaker is also a solution for efficient demolition of large, strong concrete structures.
Accepting hydraulic flow of 119 to 140 gallons per minute at operating pressures of 2,320 to 2,610 psi, the HB 10000 delivers an impact rate of up to 380 blows per minute for maximum production in extreme breaking conditions. The breaker is suitable for carriers in the 85 to 140 metric ton weight class.
For built-in protection, the HB 10000 features PowerAdapt, a system that automatically shuts down the breaker in the event that it receives excessive oil pressure from the carrier. The breaker returns to normal function once the situation is corrected. This is designed to prevent damage to internal breaker components and provide protection against carrier auxiliary circuit set-up complications that can arise when attaching the breaker to different carriers.
The HB 10000 also comes standard with AutoControl, a monitoring system that allows the breaker to adapt its frequency and power output to match operating conditions. It begins by firing the first stroke at half power to create a pilot notch that helps to center the working tool and prevent unnecessary slippage. It then adjusts the power output to match the density of the material to be broken. This reduces excess shock to both the breaker and carrier, lengthening service life on tension bolts and retainer bars.
To further maximize efficiency, the HB 10000 features the StartSelect system, which allows start-up and shut-off to be adjusted to fit job-site conditions. In AutoStop mode, the breaker will not fire until the operator applies down pressure on the working tool via the carrier. AutoStop eliminates damaging blank firing by circulating the hydraulic oil internally under low pressure when down pressure is not applied to the tool. AutoStop is also ideal for circulating and warming the hydraulic system and breaker before breaking in cold climates.
In AutoStart mode, the StartSelect system works hand-in-hand with AutoControl. The breaker begins operating as soon as the working tool comes in contact with the material regardless of down pressure, but power is limited to 50-percent until the tool can be fully seated in the breaker. This helps ensure that the breaker is properly positioned to accept full single blow energy safely without a damaging blank fire. AutoStart mode makes the breaker more versatile and is ideal for demolition applications.
An energy recovery system designed to prevent damage from piston recoil on extremely hard materials is also standard on the HB 10000. The energy recovery system consists of a shuttle valve that detects piston rebound and a high-pressure accumulator that stores energy from piston recoil to use on succeeding strokes, increasing the breaker’s blow performance. Recycling recoil energy increases breaker efficiency and reduces pressure spikes transmitted back to the carrier.
For prolonged service life, the HB 10000 features DustProtector II and ContiLube II. The DustProtector II feature restricts dust penetration by utilizing a reusable sleeve and wiper that contacts the working tool at the base of the breaker. This protects the inner mechanism from the damaging effects of dust. ContiLube II is an automatic lubrication system mounted directly on the breaker. Featuring a compact, self-priming pump, ContiLube II eliminates the need to manually grease the breaker before and during each use.
To reduce excess vibration and noise, the HB 10000 comes equipped with the VibroSilenced damping system. Elastic elements between the percussion mechanism and guide system provide full acoustic insulation, reducing noise significantly compared to similar systems.
The HB 10000 uses a working tool of 9.45 inches in diameter at working lengths up to 35 inches. Tool options include the moil point for multi-purpose use, the flat chisel for rock breaking and demolition, and the blunt tool for breaking rock, concrete and oversized material.
For optimal equipment reliability, Atlas Copco offers the HB 10000 with its ProCare customer service program. Since many breaking applications are likely to cause significant wear and stress on equipment, worn components and other issues must be addressed in a timely manner. ProCare essentially takes the responsibility for periodic breaker maintenance out of the end user’s hands.
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Atlas Copco Construction Tools LLC offers a complete line of hydraulic handheld breakers, providing an ideal solution for jobs in concrete, asphalt, frozen soil, mortar and brickwork. Offering a high power-to-weight ratio, nine models spanning one different weight classes are available.
The heaviest of the one standard breakers in the line is the 71-pound LH 39 that delivers 110 foot-pounds of blow energy at an average impact rate of 1,275 bpm. Its power can provide a cost-efficient alternative to rig-mounted breakers for heavy-duty applicatAtlas Copco Hydraulic Handheld Breakersions in reinforced concrete, heavy asphalt and foundations.
Other standard breakers in the line include the LH 27 (producing 81 foot-pounds of energy at 1,500 bpm), the LH 22 (producing 62.7 foot-pounds of energy at 1,740 bpm) and the LH 18 (producing 48 foot-pounds of energy at 1,600 bpm). Each model has a slim design to provide a clear view for the operator, and each is equipped with basic vibration dampening.
A more ergonomically advanced version of each model is available thanks to a patented four-spring E-handle (ergonomic) that further reduces vibration levels, improves the breaker’s durability and decreases operator fatigue. The LH 40 E, LH 28 E, LH 23 E and LH 19 E produce the same results as matching standard breaker models, but reduce vibration by up to 71-percent.
A lightweight horizontal “pick-hammer” breaker is also available. The LH 11 delivers a maximum blow energy of 18.4 foot-pounds at 2,400 bpm. An easily detachable D-handle is an optional feature on the LH 11, providing for increased control and optimal positioning of the breaker and making it ideal for renovation, demolition and structural adjustment jobs.
The LH 39/40 E breaker can be adjusted to operate with an oil flow of either 7.9 or 10.6 gpm. The LH 27/28 E and LH 22/23 E will operate at either 5.3 or 7.9 gpm. And the LH 18/19 E and LH 11 models operate at 5.3 gpm.
Optimum operation for the breakers is achieved when powered by a carrier with hydraulic capabilities or by seven of a wide range of Atlas Copco hydraulic power packs. These packs feature a power-on-demand method that automatically decreases the pack’s engine speed when the tool is disengaged, reducing fuel consumption and extending the life of the power pack. Equipped with wheels and handles, a power pack can be easily moved around a job site to increase the breaker’s flexibility. The breakers and power packs are small enough to transport by pickup truck and store on a shelf when not in use.
Each breaker comes standard with a 1.3-foot hydraulic twin hose, which is complete with screw couplings for connection to the breaker and flat-face quick-release couplings for connection to the power pack hose or to the twin extension hose. An optional oil flow divider and extension hoses are available for jogging the breakers off hydraulic-powered carriers.
The line of breakers was added to Atlas Copco Construction Tools’ product line through the acquisition of Lifton, a leading manufacturer of hydraulic handheld breakers, power packs, cut-off saws, core drills, post drivers, water pumps and other equipment for the global construction, demolition, utility, mining and rental industries.
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They give a beating and they take one. They leave a job site much different than when they arrived. They are destructive, which is why contractors like them so much.
Hydraulic breakers turn compact loaders and excavators into powerful demolition machines, breaking concrete, asphalt, rock and other materials. Often, these materials need to be removed before replacement or new construction can begin. That means contractors who use hydraulic breakers are under deadline. Like any piece of equipment, keeping a hydraulic breaker maintained is the key to keeping it running productively so contractors can stay on schedule. Running a hydraulic breaker correctly makes it easier to maintain.
1. Sizing hydraulic breakers to the carrier
Because there are many types of compact loaders – skid-steer, compact track, all-wheel steer, and mini track – and there are many sizes of compact excavators, contractors need to make sure that the hydraulic breaker is the right size for the carrier.
Greg Rostberg, marketing manager for Bobcat Company, says that the first thing contractors need to check is the rated operating capacity of the compact loader or the lift capacity of the excavator to make sure that the hydraulic breaker can be used on the machine.
Second, the auxiliary hydraulic flow rate and pressure on the compact loader or excavator needs to be in the correct range for the hydraulic breaker to function efficiently. Both of these capacities will help determine the breaker that is the best size for use on a compact loader or excavator.
“A good resource for any contractor using hydraulic breakers is their local dealer,” says Rostberg. “Dealers have experience and knowledge with hydraulic breakers and will know which hydraulic breakers will properly fit on a compact loader or excavator.”
2. Maintaining a hydraulic breaker
The point and bushings are the most important parts of a hydraulic breaker to maintain, and keeping these components lubricated is critical to keeping the hydraulic breaker functioning. “It is easy to tell if lubrication on the point and bushings is required because a film of lubricant should always be visible on the point,” says Rostberg.
As a general rule, the point and bushings should be lubricated with oil once every two to four hours of operation. However, jobsite conditions will determine how often lubrication is required. A dusty job site or one where the hydraulic breaker must work in a horizontal or inverted position calls for more frequent lubrication of the point and bushings.
Every piece of equipment on a job site requires daily, weekly and yearly maintenance checks. Hydraulic breakers are no different. Rostberg suggests that contractors perform maintenance checks on a hydraulic breaker at the same time the checks are done on the compact loader or excavator carrying the attachment.
Daily Inspection: Before operating a hydraulic breaker, the operator should make sure the unit is in proper condition to be operated. This includes checking the following components to make sure they are not loose or damaged: attachment pins, retainers and locks; bracket cap bolts and nuts; tool retainers and locks; and hoses, connectors and ball valves.
If these components are loose or damaged, they should be replaced before the breaker is operated. If any nuts, bolts or retaining hardware are missing, they should be replaced before working with the breaker.
Hydraulic breakers work with material that is abrasive and becomes jagged during the demolition process. This material may cut small holes in hoses. Before beginning work each day, all hoses, connectors and ball valves on the breaker and the loader or excavator should be inspected for any sign of leaks. If a leak is found, the equipment should be repaired before it is used.
Jobsite conditions will cause wear on a breaker, and operators should look for cracks or other signs of excessive wear on the cradle, bracket cap or side plates. Cracks or excessive wear on the breaker require immediate attention.
The lower bushing is another area that will show wear. Each manufacturer has a different method to check the lower bushings. Rostberg says that Bobcat® hydraulic breakers come with a tool that operators can use to check the bushing and the retainer pin for wear. The tool shows whether there is too much wear for the breaker to be used.
Weekly Inspection: Weekly maintenance also involves looking for cracks and excessive wear, this time on the surface of the point, on the retainers and retainer bores, and on the piston strike face. Cracks or wear on these components should be addressed if found.
Bolts and nuts also need to be inspected each week. Rostberg suggests contractors use a torque wrench to check the tightness of the bolts and nuts each week.
Every 100 hours of operation, inspect the couplers on the hydraulic breaker side. Constant pounding of hydraulic oil on the accumulator and back pressure wears out the couplers. “Sometimes contractors say they can’t unhook their hydraulic breaker,” says Rostberg. “The reason is that they have never changed their coupler.”
Annual Inspection: At least once a year, Rostberg recommends that contractors check the hydraulic system flow and pressure on the breaker to make sure they are operating normally.
3. Maintaining hydraulic breaker carriers
Performing daily, weekly and yearly maintenance on the compact loader or excavator carrying a hydraulic breaker is important to keep the attachment working properly. A loader or excavator that is not maintained can damage the breaker.
Most important is the hydraulic system on the loader or excavator because the system powers the breaker. Hydraulic breakers are demanding on compact loader and excavator hydraulic systems, which is why some manufacturers recommend that routine hydraulic system maintenance is cut in half when breakers are used on these carriers.
Systems that support a compact loader or excavator hydraulic system, such as cooling equipment, also need to be maintained. “Efficient cooling of the hydraulic system will prevent heat-related damage and failures to the carrier and the breaker,” says Rostberg.
4. Operating a hydraulic breaker
No matter how well a hydraulic breaker and the compact loader or excavator carrying the attachment is maintained, the attachment won’t last long if improperly used.
An important operating tip for any hydraulic attachment is to make sure that the hydraulic oil on the carrier is warm before it enters the attachment. “It’s crucial that warm oil goes into a cold hydraulic breaker,” says Rostberg. “If cold oil goes into a hydraulic breaker, the seals will hammer out quickly.”
Once a breaker is ready to be used, the operator should follow some best practices in breaking material. A breaker that is improperly operated will need more maintenance than would otherwise be necessary.
The first step is to make sure that the breaker is large enough to handle the job. When material is extremely hard, thick or if there is little time to complete the work, a larger hydraulic breaker is a better option than a smaller model because it will have the power to handle the material and will be able to break large areas more quickly.
Where the hydraulic breaker works on the material is important. “When the breaker operates closer to the edge of the material, there is higher production because the material will fracture more quickly,” says Rostberg.
Rostberg says that operators should not force the breaker to increase production. “Let the breaker do the work,” says Rostberg. “Operators who try to get a breaker to work faster than it should can end up damaging their machines.”
Rostberg also recommends that contractors purchase a breaker that has features that aid performance. Bobcat manufactures breakers that have the energy chamber with the diaphragm positioned on the top of the piston, which ensures consistent nitrogen pressure and performance. Unlike piston-sealed hydraulic breakers without diaphragms, the Bobcat model does not require periodic recharging, reducing maintenance.
5. Storing a hydraulic breaker
Many contractors may not consider storage of the hydraulic breaker a maintenance item, but it is just as important as daily, weekly and annual maintenance checks. When a breaker is not stored properly, the attachment could be damaged internally.
Storing the breaker correctly will extend the lifespan of the attachment. Rostberg says that contractors need to check the manufacturer’s recommended storage procedures because some breakers need to be stored upright while other models can be stored horizontally.
A majority of horizontal breakers need to be stored upright. If these breakers are stored horizontally for an extended period of time, they will not work properly. If the breaker needs to be stored upright, Rostberg says that contractors should make sure the weight of the machine rests on the frame and not on the point.
Rostberg says that when a contractor is going to store a hydraulic breaker, the attachment should be kept full of oil to protect the internal components. Keeping the hydraulic breaker full of oil will prevent internal contamination or oxidation. “Cap the hoses as soon as they are disconnected from the compact loader or excavator to prevent contaminants from getting into the hydraulic breaker,” says Rostberg.
Before storing the breaker, Rostberg recommends contractors lubricate the point and bushings to protect these areas.
Contractors expect their equipment to be ready when work needs to be done. Making sure that the equipment will be ready is the responsibility of the contractor and his or her crew. Using the right size of hydraulic breaker; following a manufacturer’s recommended daily, weekly and annual maintenance guidelines for the hydraulic breaker and its compact loader or excavator carrier; and operating and storing the hydraulic breaker properly will keep this valuable attachment working at its destructive best.
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