43
july-august 2014
international
construction
QU
AR
R
YING
Efficiency imperative
successfully in Dowling’s Quarry, Abbeyleix, County Laois in
Ireland where it is processing glacier sand and gravel material. The
Aggresand plant at Dowling’s Quarry is fitted with a 12 ft (3.6
m) double deck vibrating grid with 100 mm bofor bars and 50
mm woven wire mesh. This particular plant separates 0-40 mm to
the wash plant that gives three aggregate materials and two sand.
Ready to go
In the articulated dump truck (ADT) sector,
one of the latest machines on the market is
the Liebherr TA 230 Litronic, with a transport
capacity of up to 33 tonnes. According to the
manufacturer, the large dump body combined
with the robust drivetrain guarantee efficiency.
Even in the tough conditions encountered in a
quarry, the truck impresses with good driving
characteristics, and it is always safe when it is
on the move because of its efficient retarder
performance.
Komatsu’s latest ADTs, the HM300-3 and
HM400-3, offer an EU Stage IIIB engine
platform offering increased horsepower and
lower fuel consumption and emissions. The
Komatsu Traction Control System, along with
a new suspension and retarder system, helps
the vehicles stabilise on any ground.
The HM300-3 offers a maximum payload
of 28 tonnes, while the larger HM400-3 has a
capacity of 40 tonnes.
Meanwhile, UK manufacturer Bell
Equipment showcased its next-generation
E-series ADTs at Hillhead 2014: the new
B25E and B30E. Both come with a diesel
engine with Blu@dvantage technology to
provide high tonnes per litre ratios. On
board weighing is also standard, while Bell’s
Fleetm@tic system provides up-to date
operational data for desktop fleet management.
New additions from Doosan meanwhile are
the DA30 and DA40 articulated ADTs, which
are now fitted with Stage IV/Tier 4 Final
engines. Like all Doosan ADTs, the new DA30 and DA40 models
feature an articulation hinge positioned behind the turning ring
to provide equal weight distribution to the front axle even during
maximum steer articulation.
This together with a free-swinging rear tandem bogie ensures
equal distribution of weight to each wheel and guarantees
permanent 6-wheel contact and drive for equal power distribution
and excellent performance on difficult terrain.
Doosan says its new models offer best-in-class fuel efficiency
thanks to the use of new Scania engines and ZF EP transmissions.
The DA40’s body capacity has been increased to 24.4 m
3
,
enabling it to carry 40 tonnes without a tailgate, which is a +15%
increase on the previous model.
This illustrates the clear common theme throughout the
quarrying sector – whether it is new low emission machines for
Europe, Japan and the US, or equipment for lesser regulated
markets – that higher productivity and better fuel efficiency are
available with the latest generation of equipment.
iC
The new MR 122
Z impact crusher
from Kleemann in
action at Grange
Quarry.
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SKF Life Cycle
Management
The Power of Knowledge Engineering
®SKF isa registered trademarkof theSKFGroup | ©SKFGroup2014
A “living” process for equipment optimization
Construction equipment OEMs and end users understand that
effective management of assets throughout their life cycle can
deliver significant value and reduce total cost of ownership.
SKF draws on decades of
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experience and a unique mix
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higher reliability
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