Develon DX420LC-5

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Higher productivity. More efficiency.
As a leader in the 40-50 metric ton size class, the Doosan® DX420LC-5 provides solid performance, excellent fuel efficiency, an operator-focused working environment and exceptional durability to deliver consistent results.

Designed for long life with an extra-sturdy frame and reinforced superstructure, the DX420LC-5 is built for reliability. The boom design and x-chassis frame are designed for greater integrity and durability.

Comfort and Convenience
A spacious cab provides unmatched visibility and operator comfort. An adjustable air suspension seat and high-performance air conditioning with five operating modes. An emergency engine stop is located at the base of the seat.

Enter and exit easily through the large door opening. The high-performance air conditioning offers adjustable airflow and five operating modes. The adjustable reclining air suspension seat offers lumbar support. A rear view camera and optional side camera give you more visibility to your work.

Designed for Durability
Bushings and ultra-hard wear disks are designed for extended service intervals and steady performance. The permanently sealed and lubricated track links maximize uptime and reduce operating costs. Monitor your Doosan heavy equipment and manage maintenance to reduce operating costs with Doosan Connect Telematics.

Controls for machine functions are simple and placed for your convenience. Easily change the control pattern from ISO to BHL to match your preference. Two-way auxiliary hydraulics can now be controlled via a joystick switches or the new optional foot pedal control.

Select the correct auxiliary flow rate using a switch on the control pattern. A straight travel option is ideal for straightforward and backward travel in trenching applications.

Tier 4 Technology
To reach Tier 4 emissions standards, the DX420LC-5 incorporates a high-pressure common-rail (HPCR) fuel delivery system as well as cooled exhaust gas recirculation (CEGR) combined with a diesel oxidation catalyst (DOC) and selective catalyst reduction (SCR). Read about our Tier 4 technologies to learn more


MODEL Doosan DX420LC-5
Rated Flywheel Power (Gross) 344.6 hp @ 1,800 rpm (ISO-9249)
Rated Horse Power (Net) 337.9 hp @ 1,800 rpm
Max. Torque (Net) 1176 lbf·ft @ 1,300 rpm
Engine Emissions Tier (EPA) --
Hydraulic System  
Main Pump: Displacement 11.29 in³/rev
Control Valve: Relief Valve Pressure (Normal) 4694 psi
Control Valve: Relief Valve Pressure (Boost) 4978 psi
Main Pump: Max. Flow Rate (each) 88.5 gal/min
Upper Rollers: Quantity Per Side 2
Lower Rollers: Quantity Per Side 9
Track Length 17' 0"
Track Link: Track Gauge 9' 0"
Swing Mechanism  
Swing Performance: Max Swing Torque 118332 lbf·ft
Swing Performance: Max Swing Speed (At Efficiency) 8.82 rpm
Travel System/Drive Mechanism  
Travel performance: Traction Force (Highest Value) 2,802,538 lbf
Travel performance: Traveling Speed - Low (XXX/) 1.93 mph
Travel performance: Traveling Speed - High (/XXX) 3.17 mph
Travel performance: Gradeability 70°
Operating Weight 94,799 lbs
Standard Boom Length 21.98 ft
Standard Arm Length 10.66 ft
Standard Bucket Size 2.49 yd³
Shoe Width 2' 7"
Shipping Height - Hose (With Attachment) 11' 4"
Shipping Length (Without Attachment) 38' 6"
Shipping Width (Standard) 11' 7"
Overall Height Over Cab 10' 4"
Working Range  
Max Digging Reach (Ground) 37' 0"
Max Digging Depth 25' 4"
Max Loading Height 25' 3"
Digging Force (ISO)  
Arm Digging Force - Pressure up 4429 lbf
Bucket Digging Force - Pressure up 6092 lbf
Arm Digging Force - Normal 4181 lbf
Refill Capacities  
Fuel Tank 169.07 gal
Hydraulic System 126.8 gal
Engine Coolant 13.47 gal
Engine Oil 11.89 gal
Hydraulic Tank 103.03 gal
Noise Level: Guaranteed Sound Power Level 106 dBA
Noise Level: Operator 72 dBA
Lift Capacity  
Lifting Capacity over front @ Horizontal Distance - 10 ft Above Ground 31,820 lb @ 20 ft
Lifting Capacity over front @ Horizontal Distance - Ground Level 37,380 lb @ 20 ft
Lifting Capacity over front @ Horizontal Distance - 10 ft Below Ground 35,010 lb @ 20 ft


WARNING: This product can expose you to chemicals including engine exhaust (including diesel engine exhaust when equipped), lead and lead compounds, mineral oils, soots, phthalates, and carbon monoxide which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.