Hydraulic Breakers for Excavators 8.0–35.0 t
LIS® hydraulic breakers for excavators from 8.0 to 35.0 t are box-type demolition breakers for concrete demolition, demolition work, rock breaking, road construction, utility construction and heavy civil engineering. Selection is based on carrier weight, mounting system, oil flow, operating pressure, return pressure, impact frequency and tool diameter.
- Carrier class: excavators, wheeled excavators and crawler excavators mainly from 8.0 to 35.0 t
- Mounting options: depending on the item, MS08/SW08, MS10/SW10, CW10, CW20, CW40 or version without bracket
- Technical selection: check oil flow, operating pressure, return line, hose size, breaker weight and application material
For smaller carrier machines, see our hydraulic breakers for mini excavators from 0.8 to 7.0 t. For heavy carrier machines, see hydraulic breakers for excavators from 40.0 to 75.0 t. Suitable chisels, wear parts and accessories are available under hydraulic breaker accessories.
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Selecting the right hydraulic breaker for an excavator
Hydraulic breakers for excavators must be matched to the carrier machine, quick coupler and hammer hydraulic circuit. Key criteria include carrier weight, breaker weight, mounting system, oil flow, operating pressure, return pressure, hydraulic hose size, tool diameter and application material. Incorrect oil flow can reduce impact frequency or lead to increased oil temperature.
In daily construction use, these attachments are also referred to as demolition breakers for excavators, excavator breakers, hydraulic hammers or hydraulic breaker attachments. For this category, the carrier class is decisive: the hydraulic breakers listed here are designed for excavators, wheeled excavators and crawler excavators in the medium performance range. For smaller carrier machines, see hydraulic breakers for mini excavators from 0.8 to 7.0 t.
Technical overview of the LIS® BT series for excavators up to 35.0 t
| Model series | Carrier class | Mounting system | Oil flow | Operating pressure | Impact frequency | Tool Ø |
|---|---|---|---|---|---|---|
| LIS75A-BT | 6.0–9.0 t | MS08 / CW10 | 45–85 l/min | 120–150 bar | 400–800 BPM | 75 mm |
| LIS100A-BT | 11–16 t | MS10 / CW20 | 80–110 l/min | 150–170 bar | 350–700 BPM | 100 mm |
| LIS135A-BT | 16–21 t | MS10 / CW40 | 120–180 l/min | 160–180 bar | 350–600 BPM | 135 mm |
| LIS140A-BT | 18–25 t | MS10 / CW40 | 120–180 l/min | 160–180 bar | 350–500 BPM | 140 mm |
| LIS155A-BT | 28–35 t | without bracket / project-specific | 180–240 l/min | 160–180 bar | 250–350 BPM | 155 mm |
The LIS75A-BT model covers the transition range from 6.0 to 9.0 t and is listed in this category as an adjacent excavator class. The main focus of this category is on hydraulic breakers for excavators from 8.0 to 35.0 t. Depending on the item, versions with a quick coupler bracket or without bracket are available. A version without bracket is suitable when an existing adapter solution is used or when a machine-specific mounting bracket is to be built separately.
Selection by carrier machine, hydraulics and application limits
For excavators in this class, the total weight of hydraulic breaker, mounting bracket and quick coupler must be considered. A carrier machine that is too small may lose stability; a carrier machine that is too large can mechanically overload the hydraulic breaker. Boom, dipper arm, mounting geometry and hydraulic output should also match the selected breaker size.
Hydraulic matching is equally important. Supply and return lines must be sufficiently dimensioned. Line cross-sections that are too small increase back pressure and can lead to oil overheating or irregular impacts. Before commissioning, oil flow, operating pressure, return pressure, hose connections, oil filtration and oil condition should be compared with the technical data of the hydraulic breaker.
Box-type design, nitrogen technology and ABH blank firing protection
The LIS® hydraulic breakers in this category are designed as box-type hydraulic breakers. The breaker is operated hydraulically via the oil flow of the carrier machine; the nitrogen-assisted impact mechanism supports the conversion of hydraulic energy into impact energy. Working performance depends significantly on correct oil flow, suitable operating pressure, clean hydraulic oil and proper installation.
On appropriately equipped model series, an ABH blank firing protection system is provided. It supports protection against impacts without sufficient counter-pressure, but it does not replace correct operating practice. Blank firing, levering with the chisel, side loading, using the breaker to transport loads and prolonged hammering on the same point should be avoided.
Applications in demolition, rock breaking and civil engineering
Typical applications include concrete demolition, foundation demolition, demolition work, rock breaking, asphalt breaking, road construction, utility construction and heavy civil engineering. The specific breaker size should always be selected according to material, excavator class, hydraulic output and required tool diameter. For hard or brittle material, the correct chisel selection is decisive in addition to impact energy.
For particularly heavy-duty applications with larger carrier machines, see also hydraulic breakers for excavators from 40.0 to 75.0 t. The full product range is available through the main category hydraulic breakers.
Chisels, wear parts and workshop notes
The choice of chisel depends on the material and its breaking behaviour. Pointed chisels and wedge-type chisels support penetration into the material, while blunt tools work through impact on hard, brittle material. Chisels, chisel bushings, front bushings, pins, seals and hoses are wear and inspection areas.
- Lubrication: lubricate chisel and bushings regularly according to the operating manual.
- Hydraulic oil: monitor oil level, oil temperature, oil filtration and contamination before and during operation.
- Operation: avoid blank firing, levering with the chisel and prolonged hammering on the same point.
- Inspection: check hoses, connections, bolts, pins, bushings and visible wear areas regularly.
Suitable working tools, wear parts and further accessories are available under hydraulic breaker accessories.
User manuals, warranty and technical support
For installation, commissioning, maintenance and safety-related information, the user manuals for LIS® hydraulic breakers are available for download. Before operation, the technical data of the hydraulic breaker should be compared with the carrier machine. This includes carrier weight, oil flow, operating pressure, return pressure, mounting system, hydraulic lines, hose connections and application material.
LIS® attachments are subject to the LIS® warranty terms and conditions. Wear parts, tools and components specified in the warranty terms must be considered separately.
Not sure which item fits? Our technical team will assist you in selecting the right hydraulic breaker for your excavator. Technical support.
Note: Brand names, quick coupler names and system designations are used solely for technical identification and compatibility checks. These are not original parts of the respective manufacturers unless explicitly stated.
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