Designed and tested for compatibility with Komatsu excavators from the PC78 up to the PC490, hydraulic breakers are a flexible and crucial attachment used for a variety of tough rock and concrete applications such as concrete demolition, trenching, pipeline, foundation work, tunneling, dredging, quarry excavation, mining, and more.
To protect the breaker, carrier, and operator, Komatsu built in several new features and benefits. 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.
Adding to longevity and durability, blank firing protection is standard and includes a hydraulic cushion at the base of the cylinder, to reduce metal-to-metal contact. Larger models feature special key slot dampers that help reduce vibration to the excavator, adding to operator comfort.
The simple design of the JTHB-G hydraulic breakers translates to reduced maintenance and fewer parts to buy, to help lower equipment-running costs. A one-year warranty comes with all G-series breakers and also applies to breakers used for mining and quarry applications.
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For consistent impact power in a variety of environments, sound dampening housings help assure compliance with noise ordinances, even in urban applications. The breaker protects itself with a patented pressure regulator valve to prevent overflow, and its dampening system helps prevent damage to excavator booms and housing cracks.
To enable the use of more powerful breakers on smaller excavators, a single powercell eliminates heavy tie rods to provide a better weight-to-power ratio on compact models, while the mounted automatic lubrication feature helps protect against dust and debris. Similar to the G-series, all H-series breakers come with a one-year warranty.