Products & Equipment Pits & Quarries
Doosan’s new breakers provide increased strike power and productivity

December 4^th, 2012, West Fargo, N.D. — The Doosan DXB130H and
DXB190H hydraulic breakers feature an energy recovery system that increases
strike power for maximum productivity.

December 4^th, 2012, West Fargo, N.D. — 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 in a variety of demanding applications.

Delivering up to 600 blows per
minute, the 2,822-pound DXB130H is designed for use with excavators in the 15
to 22 metric-ton 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 gallons per minute.

The 3,698-pound DXB190H is designed for use with
excavators in the 21 to 31 metric-ton 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 gallons 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
patented 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.