Base machine
The chipping unit consists of a 1006 drum chipper, complete with its own diesel engine and electrical and hydraulic systems, with everything built on a robust mounting frame. It is principally dimensioned for processing energy wood, brushwood and parts of trees, and should be installed on a carrier vehicle with corresponding payload capacity and dimensions. These particular units are typically installed on forwarders, trucks or other suitable carriers.
Drum chipper
The drum chipper is driven by a 585kW (796hp) diesel engine, ensuring the high-torque properties needed for very high capacity chip production.
The 1006 chipper is designed for heavy-duty conditions. It is a chipper with a powerful infeed and closed drum for best chip quality, with chip output via a chip accelerator and chip tube. This combination provides the most energy-efficient chipping process and a consistently high chip quality.
Mounting frame
The chipper unit stands on a mounting frame with integrated brackets for the chipper and engine installation. Spring-loaded brackets for the carrier vehicle chassis allow for a degree of independent movement by the chipping unit and carrier frame. The frame can be equipped with a slewing ring that provides a rotatable unit, which can be operated from either side. A fold-down service platform is also available for knife exchange and maintenance, and a roofed cage with hatches protects the diesel engine.
Diesel-engine Volvo TWD 1683VE
The latest 1006.2 ST units are fitted with Volvo’s state-of-the-art TWD 1683VE diesel engines, which meet the European Union (EU) Stage V regulations. The engine offers a power output of 585kW (796hp) and a torque rated at a maximum of 3,650Nm, delivering more power and torque in the speed range used during chipping. Especially favorable for chipping, is the high, straight torque curve down to lower engine speeds where, at 1,000 rpm, the torque is at just over 3,500Nm. These precise power and torque curves are also extremely helpful when it comes to attaining an even lower fuel consumption during chipping.
The complete installation includes a side-by-side mounted radiator, reversible fan, starter batteries, double centrifugal cleaner, a 1000-liter fuel tank, and exhaust system. Power transmission is via a pump distribution box, cardan shaft and belt transmission.
Hydraulic system
1006.2 ST chippers feature an advanced hydraulic system. Their 120-liter stainless-steel hydraulic oil tanks have a patented CycloneConcept insert. This vents the return oil and allows the necessary volumes of hydraulic oil to be vastly reduced, along with the size of the stainless-steel tank. The overall result minimizes environmental impact and operating costs.
The hydraulic system is a load-sensing type and it powered using a variable pump. Proportional valves enable the exact operation and control of the infeed. A hydrostatic pump enables the chip accelerator to run at a constant speed regardless of engine’s revolutions. As an option, the machine can be equipped with a hydraulic pump for a crane.
The hydraulic cooler is located in front of the engine cooler system, with a 24V electric-drive hydraulic pump used as a service pump to operate the hydraulic functions when the engine is switched off, for example, changing the knives during maintenance.
Electrical system
The chipper features a complete control system with monitoring and safety features, including hydraulic oil levels, temperature and filter controls. Electronically monitored infeed load control provides the most effective high-capacity chipping. Everything is controlled via a central Windows-based computer located in the driver’s cabin.
The system has a color touchscreen with instruments and control devices for all hydraulic functions. A set of push buttons for operating the chipper functions are located near the crane control levers.
Bruks-Siwertell
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