{"id":20040,"date":"2026-01-14T14:48:42","date_gmt":"2026-01-14T13:48:42","guid":{"rendered":"https:\/\/www.darda.de\/?page_id=20040"},"modified":"2026-01-14T14:48:42","modified_gmt":"2026-01-14T13:48:42","slug":"machine-retrofit","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/machine-retrofit","title":{"rendered":"Machine retrofit"},"content":{"rendered":"
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The retrofit of a machine means the professional adaptation of carrier machines and attachments to new tasks, materials, or boundary conditions. In concrete demolition, special demolition, interior demolition, rock demolition and tunnel construction<\/a>, as well as natural stone extraction, flexible retrofitting is crucial to work precisely, with low vibration, and cost-effectively. A recurring practical example is switching from a breaker hammer to a concrete demolition shear<\/strong> for selective deconstruction, or switching to stone splitter and concrete splitter<\/strong> when low-noise and controlled work is required in sensitive zones. The following sections explain how the retrofit is technically planned, safely implemented, and qualitatively evaluated\u2014referencing attachments and power units from Darda GmbH without promotional character.<\/p>\n

Definition: What is meant by machine retrofit<\/h2>\n

A machine retrofit is the systematic adaptation of a carrier machine\u2014such as an excavator, demolition robot, or carrier sled\u2014as well as the power supply and control, to be able to use different attachments or meet changed work requirements. This includes mechanical interfaces (mounting, adapter plate<\/em>, quick coupler<\/em>), hydraulic parameters (working pressure, oil flow, return line), electrical\/control signals, as well as occupational safety<\/em> and documentation obligations. Typical reasons include switching to concrete demolition shear<\/em> for selective concrete demolition, adapting to stone splitter and concrete splitter<\/em> in areas with vibration or noise restrictions, switching from standard to special shears (combination shears, steel shear<\/em>, tank dismantling<\/em>) or integrating a hydraulic power pack<\/em> when the carrier machine does not provide the required oil flow or system pressure.<\/p>\n

Planning and sequence of the retrofit<\/h2>\n

Technical planning begins with a clear task analysis (construction materials, reinforcement, component thicknesses, desired cutting or splitting results, boundary conditions such as noise, dust, vibrations). This is followed by the technical assessment of the carrier machine (weight class, load capacity, hydraulic connections, permissible system pressure, maximum flow rate, return routing) and of the target tool (required pressure\/flow, weight, center of gravity, single\/double-acting operating mode). From this arise the need for adapter plate<\/em> or quick coupler<\/em>, any changes to hydraulic hose lines, couplings and case-drain lines, the selection of a suitable hydraulic power pack<\/em>, and the definition of the control logic (fine controllability, proportional or stepped). The assembly sequence includes mechanical mounting, hydraulic hose routing with pressure- and flow-rated lines, a structured leakage test<\/em> and functional check, setting the working pressures, running-in under load, and documented commissioning<\/em> including operator briefing. Especially with concrete demolition shear<\/em>, sensitive controllability is important for clean biting of concrete while protecting the reinforcement<\/em>; with stone splitter and concrete splitter<\/em>, correct pressure provision and safe wedge guidance take priority. In addition, operating manuals<\/em> must be observed, hazard analysis<\/em> updated, and markings supplemented.<\/p>\n

Hydraulics and power supply<\/h2>\n

The hydraulics are the heart of the retrofit. They determine whether a machine can operate an attachment efficiently, safely, and durably.<\/p>\n

Oil flow, pressure, and control<\/h3>\n

Every tool requires matched system pressure and suitable oil flow. Insufficient flow slows cycle time; excessive flow causes unnecessary heating. Sensitive control improves quality in precision demolition. For concrete demolition shear<\/em>: high crushing force<\/em> must be applied in a controlled manner to open components without overloading the carrier machine. For stone splitter and concrete splitter<\/em>, a reproducible pressure ramp is critical so splitting wedges seat evenly and intended fracture lines develop.<\/p>\n

Return, case drain, and filtration<\/h3>\n

A sufficient, preferably low-pressure return line protects seals and reduces heat. Case-drain lines\u2014where required\u2014must be correctly sized and routed without pressure. Effective filtration prolongs the service life of valves, cylinders, and couplings.<\/p>\n

Hydraulic power packs in concert<\/h3>\n

If the carrier machine does not deliver the required pressure or flow, external solutions such as integrated hydraulic power units<\/a> can be added. This supply enables operation of power-intensive tools or the parallel use of multiple consumers. For splitters and special shears, stable pressure, constant delivery rates, and easily accessible quick coupling<\/em> points are decisive.<\/p>\n

Mechanical interfaces and carrier machine<\/h2>\n

Mechanical compatibility is a prerequisite for safe operations. Adapter plate<\/em>s, pin diameters, widths, and quick coupler<\/em> systems must fit exactly.<\/p>\n

Weight, center of gravity, and load capacity<\/h3>\n

The operating weight of the attachment affects stability. The load charts of the carrier machine must be observed. Concrete demolition shear<\/em> with large jaw openings requires sufficient lift force even with the boom extended. Splitter systems with cylinder units and wedges change the center of gravity, especially during boom work or on carrier sleds in tunnels.<\/p>\n

Mounting and protection<\/h3>\n

The mounting should be torsion-resistant. Guard plates, hose protection, and guidance aids reduce damage. For indoor work\u2014such as interior demolition\u2014compact mountings are advantageous for precise maneuvering.<\/p>\n

Application fields and typical retrofit scenarios<\/h2>\n

Depending on material, component thickness, and boundary conditions, different tools are advantageous. Some typical switches in practice:<\/p>\n