DL 400 Doosan DL 400 Specifications & Technical Data (2006—2009)

Axle

Improved internal oil flow greatly reduced the temperature difference between the hub and the differential, as well as prevents premature disc wear due to overheating of the internal hub components.

Increased Axle Durability

The brake discs have been repositioned to the rear part of the reduction gear where the rotation speed is low. As a result, the discs are exposed to lower speeds and heat generation is reduced, greatly extending the life span of the discs. An automatic disc clearance adjuster has been integrated into the axle and the disc brake interval, ensuring that the optimum level of clearance is maintained at all times by an internal brake spring. Each wheel can be measured without disassembling the hub. Additionally, the brake hub has been redesigned into the axle to reduce vibration, especially from road shocks as the machine drives over rough terrain. The sintered metal brake discs have extended the service intervals of the discs three times.

Cummins QSL 9 Engine

The QSL 9 low emission engine combines a patented High-Pressure Common-Rail (HPCR) fuel injection system with full authority electronic controls to ensure low performance with a strong torque rise.

Full Auto Transmission

The electronic powershift transmission is particularly smooth and gear ratios perfectly spaced to give the operator a speed that gives excellent traction in every working conditions. Built-in electronic controls, the engine power is controlled to match the hydraulic demand, delivering more power and efficiency in load and carry operations which contributes to the improved fuel efficiency.

Hydraulically Operated Reverse Fan

With direct control of the variable speed on-demand fan, temperature levels and the engine coolant, transmission oil are constantly monitored. Controlled fan speed improves fuel efficiency, lowers noise levels and reduces radiator plugging. The hydraulic fan can be switched to reverse operation from the cabin or quickly clean out the cooling system.

Engine

The high performance Cummins QSL 9, combining a 6 cylinder in-line, high-pressure common-rail (HPCR) fuel injection system with electronically controlled direct injection and turbo charged air to air intercooler offers low fuel consumption and emissions.

Transmission

"Full Power Shift" transmission. It can be used in manual or automatic modes. This transmission is based on components having excellent worldwide reputations. It is equipped with a modulation system allowing soft gear shifting and inversion of travel direction. Safety devices also protect the transmission from bad operations. The gear and direction shifting is operated by a single lever to the left of the steering wheel. A travel direction control is also mounted on the joystick. With a special electronic device, the transmission can be tested and adjusted easily for optimum performance and efficiency. The transmission can be de-clutched by the operation of the brake pedal to increase the power available for the hydraulic pumps. A safety device prevents the starting of the engine when not in neutral.

Performance

DL400 features an intelligent, load-sensing hydraulic system. Two variable piston pumps provide the exact flow and pressure required and deliver a powerful, highly effective force, offering superior penetration of the hardest materials. The exceptional drawbar pull at the wheels is reinforced further by providing limited-slip differentials as standard equipment. The engine offers high power and torque characteristics. As a result, the hydraulic system is able to multi-function with power and speed.

Hydraulic Power Steering

Works with a flow amplifier and priority valve. The emergency steering system is equipped as an option to secure safety against a malfunction of the steering system during traveling.

Hydraulic System

Two load-sensing axial piston pumps with variable displacement. The main control valve of double acting 2-spool is controlled by a standard single lever. Automatic boom kick out and bucket return to dig is standard. All hydraulic lines are equipped with special seals (ORFS).

Air Conditioning & Defroster System

Double filtered air cab, air ducts are properly placed all around the cab with proportional sensitive controls and air re-circulation facility, we offer the same comfort as a passenger car.

Operators' Cab

The modular cab allows excellent visibility in all directions. The optimal ventilation is obtained by numerous ventilation outlets. Touch buttons control the air re-circulation air conditioning and heating systems. The air of the cab is filtered. All necessary information for the operator are centralized in front of him. The main functions are actuated with switches located on a console at the right of the operator. Generous storage areas are well located. The cab, mounted on viscous element and equipped with air suspended seat, offers a better comfort for the operator.

Switch

The ergonomically laid out switch panel in line with the natural movements of the body allows for easy convenient operation. The spare switch provides easy installation of additional electric accessories.

Central Monitor Panel

The compact central monitor panel is ergonomically designed and allows the operator to monitor the status and warning lights at a single glance.

Lifting System

The lifting system with two cylinders and Z configuration is designed for the toughest jobs. The breakout force (22 ton with a 3.9m³ bucket) is very important, and the bucket movements are fast. The bucket angles are well kept in good positions on the range of bucket stroke.