General Information and Company Contacts

The document begins with disclaimers noting that illustrations may not represent the standard product version and that availability varies by market. Specifications and materials are subject to change without notice. Doosan Infracore operates globally with offices in multiple countries, providing customer support via telephone and fax.

Product Overview: DX53W Hydraulic Excavator

The DX53W model builds on its predecessor by enhancing operator value through improved productivity, fuel efficiency, ergonomics, reliability, and reduced maintenance. It features a new generation engine and electronically optimized hydraulic system. The machine weighs 5,550 kg and has an engine power of 37.8 kW (51.4 HP) at 2,200 rpm, with a bucket capacity of 0.175 m³.

Operator Comfort and Cabin Design

• Spacious cabin typical of medium to large machines with ergonomic controls.
• Fixed-type control panel with centralized, waterproof display for easy monitoring.
• High-capacity air conditioning and defroster systems ensure comfort and safety in various climates.
• 360-degree visibility through panoramic cabin design and multiple windows and mirrors.
• Improved access with larger entry/exit dimensions.

Operator Seat and Controls

• Ergonomically placed control supports with space for optional devices.
• Comfortable two-stage sliding seat with adjustable cushion, optional lumbar support, seat heater, and rear pocket.
• Semi-automatic air conditioning panel with multiple modes.
• Blade control lever and hydraulic transmission lever positioned for ease of use.
• Joysticks with comfortable grips and multiple buttons for precise operation.
• Adjustable steering column for operator comfort.

Performance Specifications

• Boom swing function allows operation in narrow spaces with minimum front and rear swing radii of 1,980 mm and 1,650 mm respectively.
• Swing angles: 50° right, 80° left.
• 20% faster boom and arm operation speeds compared to previous models.
• Increased swing torque by ~10% with hydraulic oil lubrication, eliminating grease needs.
• Automatic fuel feed pump and RPM indicator with automatic acceleration for fuel efficiency.

Engine and Drive System

• Powered by YANMAR 4TNV94L, 4-cylinder engine delivering 51.4 HP.
• High gradability and work capacity with powerful engine-driven steering and maximum steering angle.
• Reduced attachment swing bearing height by 65% for enhanced stability.
• Stabilizer cylinders increased diameter by 36%, improving support and stability with automatic locking.
• High ground clearance suitable for rough or swampy terrain.

Durability and Reliability

• Use of sintered metal bushings with extended greasing intervals (250 hours).
• Protective covers on axle shafts and polymer pads to reduce wear.
• Reinforced boom and arm designs optimized by finite element analysis for uniform load distribution and fatigue resistance.
• D-type frame and rigid welded chassis frame for strength and shock resistance.
• Efficient hydraulic line routing and heavy-duty transmission and axle protection.

Operator Convenience and Safety

• Improved front headlight visibility for all lighting conditions.
• Combination key system enhances security on doors and fuel cap.
• Blow-out control system reduces cabin air temperature for operator comfort.
• Optional load capacity sensor with warning alarms for overload prevention.

Maintenance Features

• Easy access to radiators, coolers, and engine components for cleaning and servicing.
• High-performance radiator system (details incomplete).
• Large capacity air pre-cleaner and breather to protect engine and hydraulic pumps.
• Oil radiator front guard and small exhaust silencer for cooling and noise reduction.
• Engine oil filter and hydraulic oil level easily accessible.
• Integrated grease tubes and lockable toolbox for maintenance convenience.
• Water separator with visual gauge to prevent fuel system issues.
• Extended maintenance intervals (250 hours recommended).

Technical Specifications: Engine and Hydraulic System

• Engine: YANMAR 4TNV94L, 4 cylinders, 37.8 kW (51.4 HP) at 2,200 rpm, max torque 207 Nm at 1,320 rpm, displacement 3,054 cc.
• Electrical: 12 V ignition, 12 V/100 Ah battery, 12 V/60 Ah alternator.
• Hydraulics: Two tandem axial piston variable displacement pumps (2 x 60 L/min), two gear pumps, pilot pump 20 L/min.
• Max pressures: Boom/Arm/Bucket and Traction 225 bar; Swing 205 bar.
• Cushion mechanisms on boom and arm cylinders for shock-free operation.

Hydraulic Cylinders Dimensions

• Boom: 110 mm bore x 60 mm rod x 712 mm stroke.
• Arm: 85 mm bore x 55 mm rod x 873 mm stroke.
• Bucket: 80 mm bore x 50 mm rod x 600 mm stroke.
• Blade: 110 mm bore x 60 mm rod x 160 mm stroke.
• Boom swing: 95 mm bore x 50 mm rod x 558 mm stroke.

Structural Frame and Components

• Deep, super reinforced box section frame with heavy steel plates.
• Fully welded stress-relief frame with high-quality materials.
• Specially treated connection pins.
• Single tires (12-16.5-12PR OTR), front axle with ±5° hydraulic oscillation.
• Wet disc service and parking brakes, fully sealed and hydraulically operated.

Drive and Swing Mechanism

• High torque axial piston motor with planetary reduction gear immersed in oil.
• Single row shear-type ball bearings with rigid induction internal gear.
• Two-position swing lock for transport safety.
• Swing speed: 9.3 rpm; rear swing radius: 1,650 mm.
• Fully hydraulic steering with mechanical 2-speed transmission.
• Travel speeds: High 26 km/h, Low 10 km/h.
• Maximum traction force: 3,300 kgf; maximum gradeability: 35° (70%).

Operator Cabin Features

• Spacious, independent, shock and noise-free cabin with safety glass on all sides.
• Front window slides upward and stores in roof; side windows open for ventilation.
• Fully adjustable suspension seat with headrest and armrest.
• Air conditioning included; ISO standard cabin.
• Noise levels: External 97.4 dB(A), Operator 76 dB(A).

Bucket and Blade Specifications

• Bucket capacities vary: 0.175 m³ (PCSA), 0.15 m³ (CECE), widths from 300 mm to 784 mm depending on side cutters.
• Bucket weights range from 96 kg to 150 kg.
• Blade widths: 1,600 mm (standard), 1,920 mm or 2,290 mm depending on configuration.
• Operational weight includes operator, lubricants, fuel, and standard equipment; varies by tire and blade setup.

Fuel and Fluid Capacities

• Fuel tank: 120 L.
• Cooling system: 10 L.
• Engine oil: 11.6 L.
• Final drive (each): 1.5 L.
• Hydraulic system: 147.8 L; hydraulic tank: 72 L.

Additional Features and Recommendations

• Molded counterweight reduces deformation from impacts.
• Metal hood protects engine from external damage.
• Joystick levers allow independent and combined operation of all functions.
• Recommended bucket material densities provided for optimal use.

Dimensions and Physical Parameters

• Cabin height: 2,855 mm; tail swing radius: 1,650 mm; minimum ground clearance: 290 mm.
• Upper structure length: 1,850 mm; wheelbase: 2,100 mm; track gauge options: 1,600 mm or 2,275 mm.
• Arm lengths available: 1,600 mm and 1,900 mm.

Excavation Forces and Working Range

• Arm digging force: 2,690 kgf (1,600 mm arm), 2,410 kgf (1,900 mm arm).
• Bucket digging force: 4,060 kgf (PCSA 0.175 m³ bucket).
• Maximum digging reach: 6,110 mm (1,600 mm arm), 6,400 mm (1,900 mm arm).
• Maximum digging depth: 3,495 mm and 3,795 mm respectively.
• Maximum digging height and dumping height also specified per arm length.

Lifting Capacity and Load Ratings

Lifting capacities are detailed for various blade positions (raised/lowered), arm lengths, load radii, and heights. Key safety notes emphasize that loads must not exceed 87% of hydraulic capacity or 75% of tipping load. Load point is defined as the hook behind the bucket. Tables provide maximum safe lifting loads in kilograms and pounds for different configurations.

Operational Notes and Safety Limits

• Load ratings are conservative and based on hydraulic system limits.
• Operators must adhere strictly to load limits to maintain safety.
• Blade position significantly affects lifting capacity and stability.

Standard and Optional Equipment

• Standard: Wide handrails, safety belt, hydraulic safety lock lever, safety glass, emergency exit hammer, rearview mirrors, hydraulic accumulator, rotating beacon, frame, single tires, heavy-duty axle, automatic water elevator lock system, 1,920 mm blade.
• Optional: Dual element air cleaner, fuel pre-filter, aluminum radiator, engine overheating and restart prevention systems, self-diagnostic system, 12V 60 amp alternator, electric horn, halogen work lights, automatic acceleration module, overload alarm, boom lock valve, cabin options (seat heater, radio, sun visor), dual tires, 2,290 mm blade, fuel supply pump, quick clamp.
• Availability of options varies by market; consultation with local distributors recommended.

Hydraulic System Features

• Arm flow regeneration, boom holding valves, replacement valve port.

Cabin and Interior Features

• Rubber mounts, air conditioning, adjustable suspension seat with headrest and armrest, front window opening outward, ambient lighting, intermittent windshield wiper, storage box, AM/FM radio with remote on/off, 12V power socket, joystick lever with 3 buttons, air conditioning filter, glass antenna, cabin mirror, additional work lamp.

Critical Information and Recommendations

• Strict adherence to load capacities by radius and height is essential for safe operation.
• Equipment options should be selected based on application needs and market availability.
• Safety features such as overload alarms and hydraulic locks are critical for operational safety.
• Regular consultation with local Doosan distributors is advised to ensure compliance and optimal equipment configuration.

Summary

The Doosan DX53W hydraulic excavator is a technologically advanced machine designed for enhanced productivity, operator comfort, durability, and safety. It features a powerful YANMAR engine, optimized hydraulic system, and robust structural components. The machine offers improved operational speeds, stability, and extended maintenance intervals. Detailed technical data on dimensions, forces, lifting capacities, and equipment options support safe and efficient use in demanding construction and excavation environments.