User Guide
Reliability
Low Oil Temperature for High Quality
SD300N
Structural Parts
Made of high-strength steel and
calculated using finite element analysis
software , it guarantees easy operations
under the most onerous and toughest
working conditions.
Multi-Way Valve
Adoption of new solid valves of wellknown
brands and processed with highprecision,
delivering good micro-motion
performance, reduced internal leakage,
and a prolonged service life.
Greater Reliability Ensured by Efficient Cooling, 24 Hours Continuous
Work under 45
°C
Environment without Risk of Overheating
Transmission
system
Working
device oil
Coolant
Working
device oil
Transmission
system
Coolant
Cooing System
By improving the cooling system’s layout and materials, DISD`s unique patented cooling
technology greatly reduces hydraulic oil temperature and Coolant temperature during the
machine’s operation time, thus resolving the high temperature problem that has been
hanging over the industry for many years. The machine is guaranteed not to overheat even
after 24hrs of continuous work under 45o° atmospheric temperature.
Other loaders
DISD Loaders
The hinge pins for operating devices in 6
positions have a radius of 5-10mm larger than
similar products in the industry. The pin roll
sets are made of highly wear-resistant
materials and processed with a special heat
treatment technology, thus offering greater
durability and second-hand residual value.
The method of articulating the front and rear
frames has been changed by replacing tapered
roller bearings with joint bearings, effectively
preventing such common problems as loose
and breakage in the industry.
Hydraulic Seal Piping
The adoption of Eaton brand parts has
greatly improved the quality of the hydraulic
system. In addition, all of the hydraulic parts
must satisfy the endurance test standard in
South Korea to ensure the high reliability of
Doosan’s loaders..
Hydraulic System Action Time: 9.5 seconds
The sum total of the times of the three actions
(lifting 5.5s, dumping 1.2s, lowering 2.8s) is
9.5s, which is much faster than the industry
level, leading to a shorter cycle operation time
and greater efficiency.
Transmission Shaft
The use of a reinforced drive shaft and a self-locking nut for the drive
shaft’s connecting bolt has improved the durability of the drive system.
Drive Axle
Drive axle and
improved differential bevel
gear processing have
increased gear flexural
strength by 34.6%, improving
the reliability of the drive axle
and extending its lifespan.
6 | |
7
+
Low Temperature Startup
(Flame Preheating)
The low temperature startup device
(Diesel electric heating + Air flame
preheating) effectively improves work
situations where it is difficult to startup in
low temperatures during winter.
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