Model Number

DX420LC

Engine

1. Model
DOOSAN DV11

 “Common Rail” engine with direct fuel injection and electronic
 control, 4 valves per cylinder, vertical injectors, water cooled,
 turbo charged with air to air intercooler.
 The emission levels are well below the values required for Phase III.
2. Number of cylinders : 6
3. Nominal flywheel power
  218 kW (297 Ps) at 1.800 rpm (DIN 6271 net)
  218 kW (293 Hp) at 1.800 rpm (SAE J1349 net)
4. Max torque : 140 kgf.m (1.373 Nm) at 1.300 rpm
5. Piston displacement : 10.964 cc
6. Bore & stroke : 128 mm x 142 mm
7. Starter : 24 V / 7 kW
8. Batteries : 2 x 12 V / 150 Ah
9. Air cleaner : Double element and pre-filtered Turbo with auto dust evacuation.

Hydraulic system

The heart of the system is the e-EPOS (Electronic Power Optimizing
System). It allows the efficiency of the system to be optimized for
all working conditions and minimizes fuel consumption.
The new e-EPOS is connected to the engine electronic control via a data
transfer link to harmonize the operation of the engine and hydraulics.

 The hydraulic system enables independent or combined operations.
 Two travel speeds offer either increased torque or high speed tracking.
 Cross-sensing pump system for fuel savings.
 Auto deceleration system.
 Two operating modes, two power modes.
 Button control of flow in auxiliary equipment circuits.
 Computer-aided pump power control.

1. Main pumps : 2 variable displacement axial piston pumps
   Max flow: 2 x 315 l/min
2. Pilot pump : Gear pump – max flow: 22 l/min

3. Main relief valves
Boom/arm/bucket:
Normal mode: 320 kg/cm2 (314 bar)
Power mode: 350 kg/cm2 (343 bar)
Travel: 320 kg/cm2 (314 bar)
Rotation: 270 kg/cm2 (265 bar)

Weight

Boom 6.700 mm • Arm 3.250 mm • Bucket 1,90 m3 (SAE) • Shoes 600 mm.

                      Shoe width (mm)          Operating weight (kg)         Ground pressure (kg/cm2)
Triple grouser         600 (std)                        40.900                                     0,74
                             750                                41.600                                     0,61
                             800                                41.900                                     0,57
                             900                                42.400                                     0,50
Double grouser      600 (opt)                        41.700                                     0,76