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Komatsu’s JTHB-G and JMHB-H breakers can be used with its PC78 excavators up to its PC490 models

Suitable for use with its PC78 excavators up to its PC490 models, the manufacturer’s new JTHB-G and JMHB-H breaker product lines feature the manufacturer’s variable energy technology for high production.

Komatsu said: “The breakers have an accumulator that eliminates hydraulic pump cavitation to prevent flow surges back to the carrier hydraulic tank.

“By recycling high-pressure oil internally, this allows more energy with a lower flow, to reduce hydraulic pressure spikes and protect the carrier’s hydraulic system”.

Described as “compact yet powerful”, the H-series models are accumulator-type hydraulic breakers that can demolish a range of rock and concrete types.

Komatsu said: “They come equipped with blank firing protection to help prevent piston movement via a hydraulic brake.”

H-Series models incorporate a single power cell that eliminates the need for heavy tire rods. This allows for a better weight-to-power ratio and means the attachment can used on more compact excavator models.

Komatsu’s new JMHB130 H-series breaker

They also feature automatic lubrication and sound dampening housing for use on low-noise urban jobsites and to help prevent damage to the excavator booms and housing cracks.

Like H-series, the manufacturer’s G-Series breaker line also comprises eight models.

Designed to offer reduced maintenance and running costs, the company’s G-Series breakers comprise just moving parts that incorporate the manufacturer’s patented tie-rod design.

The eight new JTHBG series models have a hybrid design that uses hydraulic flow and pressure combined with a chamber filled with nitrogen to create the strike energy.

According to Komatsu, this lower hydraulic pressure spikes by recycling high-pressure oil to provide more energy with a lower flow.

Both of Komatsu’s new attachment series come with a one-year warranty.