DX420LC-5 | Doosan

Doosan DX420LC-5


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.

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 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.



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) Tier 4

Hydraulic System

Main Pump: Displacement 11.29 in³/rev
Control Valve: Relief Valve Pressure (Normal) 4,694 psi
Control Valve: Relief Valve Pressure (Boost) 4,978 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) 90169 lbf-ft
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 lb
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

43,431 lb

Bucket Digging Force - Pressure Up

59,745 lb

Arm Digging Force - Normal

41,006 lb

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
  • 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
Approved Attachments

Heavy Duty Bucket

Ditch Cleaning Bucket

Severe Duty Bucket

Plate Compactor

Hydraulic Quick Coupler

Wedge Lock Coupler

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