DISD SD300N Wheel Loader User Guide

SD300N Wheel Loader
User Guide

SD300N Wheel Loader

Main Performance Parameters (Standard Configuration)

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The most efficient expert in loose bulk materials transfer!
Integrated with 40 years of international standard professional loader manufacturing technologies, Little Giant is suitable for Emerging countries’s working conditions.

Key features

MAIN PERFORMANCE FEATURES

• The Weichai Steyr low-RPM engine features an oil pump that has accepted professional test bench special adjustment, making engine acceleration performance much higher than industry level.

• Reasonable match between transmission and torque converter as well as fully play of engine power enable the whole machine to deliver stronger traction force-14% higher
  than industry level.

• The advanced drive axle and improved differential bevel gear process have increased gear flexural strength by 34.6%, enhancing the reliability of the drive akle and
  extending its lifespan.

• With 2,900mm wheel base and turning radius reduced to 6,678mm, the machine model is specially designed for light materials, enabling greater agility of movement and more efficient operation.

• Manufactured according to a reasonable and optimized design based on typical working conditions, the hydraulic system adopts double-pump confluence technology, 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 hydraulic cylinder seals and hydraulic holes in important areas are all imported brand parts, effectively improving the reliability of the hydraulic system.

• By using Doosan patented technology and a redesigned layout and materials, the cooling system significantly reduces hydraulic oil temperature and water temperature
  during operation and is capable of ensuring the unit’s capacity to work 24hrs continuously under 45 C of temperature without risk of overheating.

• Paints imported from South Korea offer more outstanding anti-rust and anti-fade effects.

High Efficiency, Energy Saving

Smart Shape, Giant Strength
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.

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.

GearBox
The torque converter gearbox from an established domestic manufacturer perfectly matches the engine, while Doosan’s uniquely designed and patented gearshift- hockimproving 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.

Connecting parts of swing frame adopt a reinforcement design to offer greater strength.

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.

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.

Reliability

Low Oil Temperature for High Qualit
Greater Reliability Ensured by Efficient Cooling, 24 Hours Continuous Work under 45°C Environment without Risk of Overheating

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.

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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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.

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..
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.

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.

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.

Comfort

Technology that Respects Human Health and Safety
The whole system comes with a standard integrated driving system that respects human health and safety, relieves fatigue, and improves work efficiency.

Cab Vision
DISD’s New Full Vision Cab adopts Korean technology. The viewpoint has been moved forward and the front visual field has been broadened by 25%, while the installation of high-performance damping material guarantees superior sealing, sound insulation, shock absorption effects.
The upgraded SD300N model guides operations, improves work efficiency, relieves fatigue, and is operated more comfortably and easily. The operating environment in the  cab boasts an optimized ergonomic design, has plenty of space and a good visual field, and delivers safe and reliable protection on the basis of a people-oriented conception.

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Cab
The cab’s interior features an ergonomic design, a super-large driving space, wider front and rear visual fields, a user-friendly design for easier operability, and industry-leading driving comfort. A new model of shock pad is used to provide stronger durability and reduced shock and noise, effectively relieving the driver’s fatigue.

Shock Pad
A new model of shock pad is used to provide stronger durability and reduced shock and noise, effectively relieving the driver’s fatigue.| Entertainment System
High-quality audio entertainment systems (MP3, radio) create a pleasant and relaxed work environment. A USB port is also available for charging mobile phones.| Deluxe Seat
High back, deep-seated position, dual armrests and multi-level spring shock absorption guarantee a comfortable operation.
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Maintenance Convenience

Professional and Technical Services for Customers

Easier Replacement
The use of quick-change brake discs allows the user to check brake pads for excessive wear at any time and change the brake pads more easily without needing to remove the tires.

The booster pump delivers a higher augmented-thrust ratio, more stable braking performance, and more convenient daily maintenance thanks to its being mounted on the body’s side.

Specification

General Specification

Operating Weight

Machine Dimensions (A x W1 x D)| 7,780 X 2,992 X 3,470 mm
Ground Clearance (C)| 480 mm
Wheel Base (B)| 2,900 mm
Tread (W2)| 2,174 mm
Turning Radius (R)| 6,680 mm
Steering Angle (a3)| 36 deg

Working Range

General parameters

Engine

Optional items of equipment

Timber grapples

Transmission system

Capacity

Working device

Hydraulic system

Front cycle time
Lifting| Dumping| Lowering| Total
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5.5 s| 1.2 s| 2.8 s| 9.5 s

Noise

Loading Material Unit Weight (Please determine the precise loading material weight according to the densities of the different materials given in the Table.)

Material Name| 1|
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Rubble| | 1,600
Mine refuse| 1| 650
Clay| Dry excavated| 1,485
Wet excavated| 14725
Natural| 1,650
Clay and grave| Dry| 11,185
Wet| 1,650
Coal| Smoke-free raw coal| 1.19
Smoke raw coal| 950
Weathered granite| 75% rock,25% soil| 1955
50% rock,50% soil| 1,725
25% rock, 75% soil| 1,585
Gravel| Pit gravel| 1,900
Dry| 1,485
Dry(1/4″ 2″)| 1,650
Wet(1/4″-2″)| 2,015
Soil| Dry| 1,550
Wet| 1,725
Fine clay| 1,125
Tight| 1,840
Soft slurry| 1730
Dry compacted soil| 1,520
Granite| Crushed| 1,650
Solid| 2,800
Plaster| Crushed| 1,810
Crushed| 1,600
Solid| 2,780
Limestone| Crushed| 1,550
Solid| 2,600
Peat coal| Dry| 415
Wet| 1,125
Alumina| | 1,425
Crushed| 1,550
Sand rock Sand| Solid| 2,300
Loose and dry| 1,440
Slightly wet| 1,680
Wet| 1,850
Compacted wet sand| 1,850
Sand and gravel| Dry| 1,730
Wet| 2,000
Furnace cinders| Crushed| 1,760
Solid| 2,100
Trappide| Crushed| 1,740
Solid| 2,880
Hematite| | 2,460
Magnetite| | 2,780
Iron pyrites| | 2,580
Taconite| | 2,800

Materials and Specifications in the catalogue are subject to change without notice.

DIPBE-02-2111
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