DOOSAN Infracore Construction Equipment has added two new models to the company’s range of hydraulic breakers for use on Doosan wheeled and crawler excavators from 14 to 38 tonnes. In addition, the company’s Bobcat range has also been extended with nine models of breakers for its compact loaders and excavators.

Like the existing DXB100H, DXB170H and DXB260H models, the  new Doosan DXB130H and DXB190H hydraulic breakers offer superior power-to-weight ratios to provide efficient reduction of rock, boulders, concrete and other demolition waste, as well as excellent excavation work.

The company spokesman says the new DXB130H breaker is suitable for excavators up to 22 tonnes, namely the Doosan DX160LC and DX180LC crawler excavators, and the DX160W, DX170W, DX190W and DX210W wheeled excavators. The DXB130H breaker has an operating weight of 1,090 kg and blow energy of 2,700 J.

Designed for use on Doosan excavators from 22 to 30 tonnes, the DXB190H breaker has an operating weight of 1,815 kg and blow energy of 4,000 J. It is approved for use on medium- to large-sized Doosan crawler excavators from the DX225LC to DX300LC models.

All Doosan breakers are intended for demolition, construction and mining applications, offering several important features including a simple, robust design providing both economical and reliable performance, low maintenance costs, operator comfort and carrier protection, according to a company spokesman.

“DXB technology ensures the carrier is protected from the effects of reduction in pressure peaks. The breakers include an energy recovery system and a patented valve system, increasing overall performance; a high-quality piston and cylinder manufactured to precise tolerances; and an advanced dampening system to protect the breakers against blank firing. The close tolerances of the parts used in the breakers result in lower maintenance costs,” he says.

Bobcat breakers

Meanwhile, the nine new models in the HB Series of hydraulic breakers from Bobcat, designed for use on the company’s compact loaders and mini- and midi-excavators, offer high performance, greatly reduced maintenance and are easy to use.

“The Bobcat models are designed for trenching, concrete demolition and general excavation work, and feature a frame with a cylindrical design, providing improved access to jobs in confined areas such as inside structures or holes,” says the spokesman.

The breakers are standard equipped with a special shield to protect hoses and fittings from being damaged when working close to the ground or in tight spots. The innovative design of the breaker hydraulic system provides increased efficiency, ensuring a longer working time without risk of overheating, he adds.

The breakers also incorporate an effective soundproofing system, whereby the striking assembly is held top and bottom by suspension systems that are not in contact with the outer cylindrical housing. In addition, the breakers present a novel internal design with fewer moving parts and no tie rods. As a result, the breakers can be completely disassembled in less than five minutes, without the need for special tooling, reducing maintenance costs even further.

The HB Series also pioneers a completely new way of working with a breaker. “For the first time ever, either a bucket or a vibrating plate accessory can easily and quickly be fitted onto the breakers,” states the spokesman.

All HB breakers (from the HB280 to the HB2380 model) share a number of common features including versatile mounting that allows use on both Bobcat compact loaders and excavators; silencing as standard; less moving parts for easy and minimal maintenance; and automatic pressure-regulator that ensures the breaker works at its optimum operating pressure on all approved carriers.

Another innovative feature is a patented treated steel ring ‘clip’ system, which retains the bushing of the tool and protects the greasing system. This ring is easily removed with a multi-purpose tool supplied with the breaker, to release the sliding bushing and the tool instantly.

Doosan Infracore acquired Bobcat Company in 2007.