User Guide
High Efficiency, Energy Saving
Smart Shape, Giant Strength
SD300N
Perfect Match between Power and Speed, Unrivalled
Work Efficiency in the Industry
Increasing the tilting angle
a3 in the carry position
allows the machine to move
on bumpy roads without
spilling any material, while
increasing the dump angle
a2 enables the machine to
dump materials more
quickly and completely.
With a 2.9m wheelbase and a
6,678mm turning radius at the bucket
edge, which is the smallest among
similar products in the industry,
Doosan’s machine is specifically
designed for light density material
working conditions and offers greater
overall flexibility, as well as more
apparent advantages especially in
confined work spaces.
“ DISD – A Pioneer of Low-RPM Engine
Matching Technology!”
Engine
With 162KW rated power and
2,000 rpm rated rotation, the
Weichai Steyr WD10G220E23
engine has been adjusted on
the basis of condition
subdivision, enabling lower fuel
consumption in the most
commonly used operating
states.
GearBox
The torque converter gearbox from an
established domestic manufacturer perfectly
matches the engine, while Doosan’s uniquely
designed and patented gearshift-shock-
improving technology efficiently prolongs the
service life of the gearbox.
Acceleration Performance Exceeds
Industry Level
The injection pump has undergone special
debugging at a professional test bench and
features greatly improved engine acceleration
performance, enabling Doosan machines to
start work in the 3rd second while other brand
machines are still in the acceleration phase.
Advanced Double Pump Confluence
Technology
The hydraulic system uses condition
subdivision to realize a reasonable match, and
makes full use of power and energy, thereby
minimizing engine oil pressure load and power
loss and enabling miniaturization of the
hydraulic pump.
The whole center of gravity has been moved
backward, and the real axle load bearing
proportion has been increased to 54%
resulting in a tipping load 10% higher than the
industry level and greatly improved product
stability.
Thanks to the box-shaped structure of the rear
frame side plates, the enhanced frame
strength makes it easy to meet the challenge
posed by harsh working conditions.
Connecting parts of swing frame adopt a
reinforcement design to offer greater strength.
4 | |
5
K1044226
3000kg
92kW/2200rpm
(kg)
(mm)
(km/h)
WP6G125E22
36
W1
a2
a3
Time(sec.)
Velocity (km/hr)
0 1 2
3
4
5
6
14
12
10
8
6
4
2
SD300N_Velocity
A_Velocity
B_Velocity
C_Velocity
Steering cylinder
Working
pump
Steering + front compound action
Steering
valve
Steering
pump
Main valve
Turbo Charged
Large torque reserve, low fuel and oil
consumption rate, and good plateau
adaptability comply with State II emission
standards.
2,000 rpm low-speed + perfect power
matching + double pump confluence
technology make Doosan loaders more fuel
efficient (about 10%) than the competitors’
products under the same working conditions.
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