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Doosan DXB130H, DXB190H Breakers Provide Increased Strike Power, Productivity

Thu November 29, 2012 - National Edition
Construction Equipment Guide

The Doosan DXB130H and DXB190H hydraulic breakers feature an energy recovery system that increases strike power for maximum productivity. The nitrogen-powered breakers are equipped with an upper/lower suspension system that isolates the power unit from the housing, making it an ideal fit for a variety of demanding applications, according to the manufacturer.

Delivering up to 600 blows per minute, the 2,822-lb. (1,280 kg) DXB130H is designed for use with excavators in the 16.5 to 24 ton (15 to 22 t) weight range, specifically the Doosan DX180LC, DX190W and DX210W. Rated in the 3,000 ft.-lb. impact energy class, the DXB130H requires a hydraulic flow rate of between 23.8 and 37 gal. (90 and 140 L) per minute.

?The 3,698-lb. (1,677 kg) DXB190H is designed for use with excavators in the 23 to 34 ton (21 to 31 t) weight range, which includes the DX225LC, DX235LCR, DX255LC and DX300LC Doosan excavators. The DXB190H is rated in the 6,000 ft.-lb. impact energy class and requires a hydraulic flow rate of between 31.7 and 47.5 gal. (120 and 180 L) per minute.

The DXB190H is engineered with Doosan’s two-speed control, which also is available on the DXB260H breaker. With two speeds, the DXB190H breaker frequency can be manually adjusted between low and high frequency settings. This allows the operator to match the breaker impact rate to the working conditions for optimized productivity.

The energy recovery system captures the piston’s rebound energy and uses it to increase strike power, maximizing performance. At the same time, the main control valve system optimizes strike power. Blank-fire protection is standard on both the DXB130H and the DXB190H, and is accomplished by using a cushion of oil at the base of the piston, which reduces the metal-to-metal contact in case of a blank fire situation.?The breakers’ suspension system extends excavator work group life by absorbing harmful vibrations and stress waves. Also, a main valve design reduces hydraulic pressure peaks that can reduce pump life, crack excavator work group welds and cause system overheating.

The cradle-mounted grease station delivers continuous grease flow, reducing bushing and tool wear while minimizing maintenance costs and downtime. The DXB130H and DXB190H breakers also come with a mounting cap, auxiliary hydraulic hoses, two moil points, toolbox and a nitrogen checking device. A one-year limited warranty also comes standard. In addition to the general purpose moil, working tools available for the DXB130H and DXB190H include a blunt tool, a chisel and a pyramidal or “nail” point.

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