Doosan Bobcat launches new High Track excavators

Doosan Bobcat EMEA has launched the new DX160LC-5 HT and DX180LC-5 HT Stage IV compliant High Track Crawler Excavators, complementing the company’s best-selling standard configuration DX140LC-5 14 tonne and DX180LC-5 18 tonne mid-range excavators.

The new High Track models are designed to meet the needs of customers requiring a combination of higher ground clearance, a reinforced track frame and a strong traction system with reinforced upper rollers for work in harsh environments and on projects where larger travelling distances are involved.

The new High Track models are particularly suited to the forestry industry, where the higher ground clearance, durable travelling system and the traction force allow them to move with ease over rough terrain, negotiate obstacles such as fallen tree trunks and to pull trailers loaded with wood.

The new DX160LC-5 HT excavator combines the upper structure from the DX140LC-5 14 tonne model with an 18 tonne class high track undercarriage system, increasing the ground clearance from 410 mm in the DX140LC-5 to an impressive 615mm. The DX180LC-5 HT is an enhanced version of the DX180LC-5 excavator, incorporating a reinforced structure and a carefully re-engineered, high performance braking system, offering the same ground clearance of 615 mm, compared to 460 mm in the DX180LC-5.

Part of Doosan’s new generation ‘LC-5’ range of machines meeting the latest Stage IV emission regulations, the DX160LC-5 HT and DX180LC-5 HT are powered by the Perkins 1204F engine, which combines reduced fuel consumption with the power and torque of larger engines with a smaller displacement. The Perkins 1204F engine provides an output of 81.6 kW (109 HP) and 94.9 kW (127 HP) at 2000 rpm, respectively, in the DX160LC-5 HT and DX180LC-5 HT. The Perkins engine uses an electronically controlled, high-pressure common-rail fuel system (2000 bar) – which reduces particulate matter emissions from the cylinder – and a waste-gate turbocharger.

The Perkins 1204F engine also guarantees trouble-free operation by meeting Stage IV emission regulations without the need for a diesel particulate filter (DPF), through the use of cooled exhaust gas recirculation (EGR) and selective catalyst reduction (SCR) after-treatment technologies.

New systems and functions have also been incorporated which reduce fuel consumption. For example, the current fuel consumption can be read directly on the LCD panel, and the engine can be shut off automatically after a pre-set time when the machine is not being operated. In addition, to save fuel, Doosan has developed a proprietary system – called SPC (Smart Power Control) – to optimise the balance between the pumps’ output and the diesel engine.

Further fuel efficiency results from the electric fan clutch on the excavators which drives the cooling fan at optimum speed. Based on coolant, hydraulic oil, cooled charged air temperatures and target engine speeds, the fan speed is controlled electrically – resulting in much lower fan noise and better fuel efficiency.

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