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CAPITAL EQUIPMENT NEWS
MARCH 2015
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(210 kW at 2100 rpm), have been designed
for advanced digging power and high trac-
tion for the penetration and handling of even
the hardest materials.
The high strength drawbar pull at the wheels
is reinforced by limited slip ZF differentials
as standard equipment. This automatically
ensures maximum tractive effort and easy
driving over soft, muddy ground. This feature
also reduces the risk of skidding and prevents
excessive tyre wear.
Metal reinforced brake discs are integrat-
ed into the planetary reduction gears in the
hubs where the rotation speed is lower. As a
result, discs are exposed to lower rpm and
heat generation is reduced. This ensures
improved machine stability, extended hours
of operation and reduced maintenance re-
quirements. For user convenience, brake
disc wear can be measured without disas-
sembling the hub.
The cooling compartment is separated from
the engine compartment to allow better con-
trol of air intake and prevents warm and dusty
air from entering. A 3-stage air filter is fitted
with a turbo 3 cyclone dust separator. A hy-
draulically driven fan for improved productivity
and reduced noise levels, is standard.
These machines have higher static tipping
loads at maximum reach with a straight frame
DL300A (13 650 kg) and DL420A (17 900 kg).
Other quality improvements of the DLA series
include a new hose, which is installed in the
air breather of ZF axles to prevent breather
congestion problems. In other wheel load-
ers, dust and sand cause clogging of the air
breather, resulting in elevated oil tempera-
tures and damage to the seals on the axles.
Buckets have been reinforced for additional
strength. Aluminium radiators are installed on
rubber mounts to dampen vibration and the
radiator grille is made of reinforced steel for
increased shock resistance. A cover has been
fitted to the propeller shaft to protect the oil
seal from dust and foreign objects. This re-
duces wear and extends service life. The high
lift arm ensures an improved dump reach and
height at bucket pivot point. The Load Isola-
tion Systems (LIS), which is standard, sus-
pends the bucket using a closed accumulator
to reduce material loss.
The design of the DLA series has also been
improved for enhanced operator comfort.
There is more space in the cab, improved vis-
ibility, push button controlled air conditioning
and heating, a comfortable air suspension
seat and convenient storage space.
Features for operators also include precise
control levers, a high visibility central indictor
panel, sun visor and room mirror, an adjust-
able steering column and arm rests for added
comfort.
These machines have been designed for
easy maintenance and thus more uptime and
greater productivity. A liquid crystal display
conveys information about the ZF transmis-
sion and reports the nature of any problem.
A laptop computer can be connected at any
time for a complete transmission diagnosis.
Features for easy maintenance procedures
include the radiator fan which swings out for
effortless cleaning and remote drain valves
are easily accessible for convenient draining
of fluids. The air conditioner condenser is ac-
cessed directly by tilting the grille.
These wheel loaders are compatible with a
wide range of attachments.
The Doosan range of earthmoving equip-
ment, which is manufactured in South Korea,
copes efficiently in diverse sectors, including
industrial, construction, civil engineering,
agricultural, mining and quarrying environ-
ments.
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