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As a leader in the 40-50 metric ton size class, the 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.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 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 straight forward and backward travel in trenching applications.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.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. Learn about all of the other performance, reliability, and comfort features by viewing the crawler excavator product section.


Doosan Construction
Model Year
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38 ft 6 in.
10 ft 4 in.
11 ft 7 in. outside tires
94,799 lb
Fuel Tank Capacity
169.07 gal


Track Length
17 ft 0 in.


Engine Type
Gross Horsepower
344.6 hp @ 1,800 rpm (ISO-9249)
Net Horsepower
337.9 hp @ 1,800 rpm
1176 lbfft @ 1,300 rpm


System Relief Pressure
4,694 psi
4,978 psi
Std Pump Flow
88.5 gal/min


Travel Speed - Forward
Low : 1.93 mph
High : 3.17 mph
Arm Length
10.66 ft
Arm Force
43,431 lb
Dig Depth
25 ft 4 in.
Dig Height
37 ft 0 in.
Load Height
25 ft 3 in.
Bucket Capacity
2.49 yd
Bucket Digging Force
59,745 lb
Boom Length
21.98 ft
Boom Lift Capacity
Over Front, 10 ft. Above Ground: 31,820 lb @ 20 ft
Over Front, Ground Level: 37,380 lb @ 20 ft
Over Front, 10 ft. Below Ground: 35,010 lb @ 20 ft


 Diesel powered Coolant Heater  
 Block Heater  
 Auxiliary Hydraulics, Two-Way w/ Optional Pedal Control  
 Intelligent Floating Boom  
 Boom Lock Valve  
 Rain Shield  
 Guard, FOGS  
 Guard, Front Window  
 Vandalism Covers  
 Work Lights  
 Rotating Beacon  
 Track Shoe Sizes  
 Straight Travel  
 Air Compressor  

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*Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer freight/preparation, dealer document preparation charges or any finance charges (if applicable). MSRP and/or final actual sales price will vary depending on options or accessories selected.