Hydraulic Breakers for Mini Excavators 0.8–7.0 t

Selecting the right hydraulic breaker for a mini excavator

Hydraulic breakers for mini excavators must match the carrier machine and its hammer hydraulic circuit. Key criteria include carrier weight, mounting system, oil flow, operating pressure, return pressure, hydraulic hose size, breaker weight and tool diameter. Insufficient oil flow reduces the impact frequency, while excessive oil flow or an unsuitable return line can increase oil temperature and cause irregular operation.

In daily construction use, these attachments are also referred to as demolition breakers for mini excavators, mini excavator breakers, excavator breakers, hydraulic hammers or hydraulic breakers for excavators. For broad search terms such as excavator breaker or hydraulic hammer, the carrier class is decisive: this category is designed for mini excavators and compact excavators from 0.8 to 7.0 t. For larger machines, see hydraulic breakers for excavators from 8.0 to 35.0 t.

Technical overview of the LIS® BT series up to 7.0 t

Depending on the item, versions with MS01/SW01, MS03/SW03, MS08/SW08 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

For correct technical selection, the carrier weight should be checked first. The total weight of hydraulic breaker, mounting bracket and quick coupler must also be considered. A carrier machine that is too small may lose stability; a carrier machine that is too large can mechanically overload the breaker.

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 and oil condition should be compared with the technical data of the hydraulic breaker.

Box-type design and nitrogen-assisted impact mechanism

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. Performance depends significantly on correct oil flow, suitable operating pressure and clean hydraulic oil.

Typical applications include concrete demolition, renovation work, light demolition, foundation work, asphalt work, utility construction, yard and path construction as well as landscaping. For heavy-duty applications with larger carrier machines, see also hydraulic breakers for excavators from 40.0 to 75.0 t.

Chisels, wear and workshop notes

The choice of chisel depends on the material and its breaking behaviour. Pointed 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 and seals are wear areas and should be inspected regularly.

• Lubrication: lubricate chisel and bushings regularly according to the operating manual.
• Hydraulic oil: monitor oil level, oil temperature 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 and visible wear areas regularly.

Suitable 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, mounting system, hydraulic lines, return pressure, 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 mini 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.