21-Year-Old Doosan Dx75 Excavator for Heavy-Duty Construction Tasks

 

Basic Information  
Product Model: DX75  
Product Type: Crawler Excavator  
Product Power: Traditional Power  
Bucket Type: Backhoe  
Product Tonnage: 7 Tons  
Operating Weight: 7350kg  
Bucket Capacity: 0.28m³  

Power System  
Engine Model: Yanmar 4TNV94L  
Rated Power: 39.7kW/2200rpm  
Maximum Torque: 24.6N·m/1475rpm  
Number of Cylinders: 4  
Working Cycle: 4-Stroke, Water-Cooled, Direct Injection  

Operating Performance  
Travel Speed: 3.0/4.7km/h  
Swing Speed: 10.7rpm  
Climbing Ability: 30°  
Bucket Digging Force: 53.4kN  
Arm Digging Force: 36.9kN  

Operating Range  
Maximum Digging Radius: Over 6270mm  
Maximum Digging Depth: 3930-4080mm  
Maximum Digging Height: 7050mm  
Maximum Unloading Height: 5165mm  
Maximum Vertical Digging Depth: 2570mm  

Overall Dimensions  
Transport Length: 6030mm  
Transport Width: 2100-2180mm  
Transport Height: 2680mm  

Hydraulic System  
Main Pump Type: Variable Displacement Pump  
Fluid Capacity: Fuel Tank Capacity 111L  

Reliability and Durability  
Reinforced Front Working Device: Advanced technology is applied for stress analysis on key parts of the boom and arm, increasing the thickness of steel plates in critical areas to enhance overall strength. Hydraulic cylinders are made of heat-resistant materials to improve oil leakage issues and increase overall strength and lifespan.  
Upper Body: Durability is enhanced by improving the main structural design and increasing the thickness of steel plates.  
Lower Body: The reliability of the overall track frame is strengthened, with a bolt protection structure designed at the cover plate of the travel motor, and reinforcement plates set at both ends of the idler support. The track pins are designed with interference fit.  

Serviceability  
Air Filter: Features high-performance dual filtration, with a snap-lock mechanism for easy maintenance.  
Water Separator: Uses a float display method for easy confirmation of fuel status.  
Oil/Fuel/Fuel Filter: Increased capacity enhances performance and extends the exchange cycle.  
Dust Screen for Radiator: The radiator is equipped with a dust screen to ensure smooth heat dissipation.  

Comfort  
Side Window Glass: Enlarged glass area at the bottom right of the cab for a wider ground view for the operator.  
LED Display: Equipped with a high-quality LED display to enhance operational efficiency and ensure visibility at night.  
Air Conditioning System: Fully automatic air conditioning system with defrost and anti-frost functions to maintain a comfortable driving environment.  
Driver's Visibility: Redesigned the left side wiper, right lower glass, and sun visor position of the front windshield to expand the driver's field of view.  
Convenience: The cab is equipped with a cup holder, ashtray, and cigarette lighter, along with a small item storage box for charging and safely storing devices like mobile phones, and a quick start switch for the air conditioning system.