The Doosan DX420 LC-9C Hydraulic Crawler Excavator is a tracked
hydraulic excavator designed for large-scale projects under the
Doosan brand. Manufactured by Doosan Construction Machinery (China)
Co., Ltd., it leverages advanced technology and fine craftsmanship
to suit high-performance and reliability-demanding scenarios,
providing efficient excavation solutions for mining and large civil
engineering projects.
Equipped with a Scania DC13 turbocharged electronic injection
engine with a power output of 245kW, it integrates an intelligent
fuel-saving mode and EPOS intelligent control system to adjust
dynamically according to different working conditions, reducing
fuel consumption.
Featuring a 2m³ large bucket design, it delivers excellent digging
force, travel traction, and lifting capacity, along with high swing
torque for smooth compound operations. The wide-track crawler and
reinforced structural components ensure stability and durability in
complex working conditions.
The split-type engine hood design centralizes maintenance
components, with an optimized fuel filter location. Long
replacement cycles for hydraulic oil and other fluids reduce
maintenance costs and workload.
The new cab offers a wide field of vision and low noise, equipped
with a full-automatic air conditioner, adjustable suspension seat,
and ergonomic control handles for an enhanced operating experience.
| Parameter Category | Specific Parameter |
|---|
| Overall Operating Weight | 42,400 kg |
| Standard Bucket Capacity | 2m³ |
| Engine Model | Scania DC13 |
| Rated Power | 245kW (328HP)/1,800rpm |
| Travel Speed | 3.2/5.1 km/h (Low/High) |
| Swing Speed | 8.6 rpm |
| Max. Digging Radius | 11,200mm |
| Max. Digging Depth | 7,435mm |
| Max. Digging Height | 10,490mm |
| Max. Unloading Height | 7,310mm |
Suitable for open-pit mining tasks such as ore excavation, loading,
and stripping, efficiently handling large volumes of earth and
rock.
Used in highway, railway, and water conservancy projects for
earthwork excavation, backfilling, and site leveling.
Applied in foundation excavation and basement construction for
large buildings, meeting excavation needs of varying depths and
scales.
Participates in urban road reconstruction and underground pipeline
laying for earthwork operations and muck cleaning.
Q: Why does the equipment’s fuel consumption suddenly increase?
A: Possible causes include a clogged engine air filter, blocked fuel
filter, hydraulic system leaks, or improper operation (e.g.,
frequent sudden acceleration, prolonged idling). Check and replace
filters as needed, inspect hydraulic systems for leaks, and
standardize operation habits.
Q: How to troubleshoot reduced digging force?
A: First, check hydraulic oil level and quality, replenishing or
replacing as necessary. Then inspect hydraulic components (e.g.,
pumps, control valves) for faults such as stuck spools.
Additionally, check for looseness or wear in working devices (e.g.,
boom, arm, bucket).
Q: What should I do if the equipment makes unusual noises?
A: Engine noises may indicate internal component wear, looseness, or
poor lubrication—check oil level and belt tension. Hydraulic system
noises may stem from pump wear or air in pipelines—inspect pump
operation and vent pipelines. Track mechanism noises require
checking crawler tracks, carrier rollers, and idlers for wear or
loose connections. Stop operation immediately to prevent fault
escalation.
