Used Caterpillar 320D2 Excavator

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Detailed Introduction of Caterpillar 320D2 Hydraulic Excavator

The Caterpillar 320D2 is a classic 20-ton class medium crawler excavator developed by Caterpillar as an upgraded iteration of the best-selling 320D model. It is designed to balance high working efficiency, low operating cost, and extreme durability, and is widely used in construction, mining, municipal engineering and other scenarios worldwide, especially suitable for construction sites with harsh working conditions and unstable fuel supply.

1. Key Specifications

Parameter	Details
Operating Weight	20,500 kg – 22,000 kg (varies with boom/stick configuration, attachment and counterweight)
Engine	Caterpillar C7.1 ACERT 6-cylinder inline diesel engine
Net Rated Power	104 kW (140 hp) @ 2,000 rpm
Emission Standard	EU Stage IIIA / US EPA Tier 3 / China Non-road Stage III
Hydraulic System	Dual main pumps, total flow 2×202 L/min, maximum working pressure 35 MPa
Bucket Capacity Range	0.8 m³ – 1.5 m³
Max Digging Depth (standard 2.9m stick)	6,720 mm
Max Digging Radius	9,850 mm
Max Dump Height	6,520 mm
Travel Speed	3.3 km/h (low) / 5.6 km/h (high)
Max Drawbar Pull	196 kN
Gradeability	70% (35°)

2. Core Performance Advantages

Power System

The C7.1 ACERT engine has strong low-end torque reserve, can operate stably at altitudes up to 3000m without obvious power derating, and adapts to ambient temperatures from -20℃ to 49℃. It is optimized for fuel efficiency, consuming 5-8% less fuel than the previous generation 320D under the same working load. Users can switch between Standard Mode (for heavy-load digging) and Economy Mode (for light-load material handling) according to working conditions to further reduce fuel cost.

Hydraulic Performance

Adopting Caterpillar's mature negative flow control system, it achieves precise and smooth control of compound movements (simultaneous digging, swinging and lifting) with almost no lag. The system also has an automatic power adjustment function that matches engine output with hydraulic load in real time to avoid power waste.

3. Durability & Reliability Design

The boom and stick are made of high-tensile strength steel with full penetration welding and stress relief treatment, which can withstand long-term heavy impact loads in demolition and mining scenarios.
The sealed and lubricated track (SALT) system reduces wear between track pins and bushings, extending undercarriage service life by 30% compared to non-lubricated tracks. Heavy-duty rollers and idlers are standard for high-wear working conditions.
The three-stage fuel filtration system removes 99.9% of contaminants above 2 microns, effectively preventing injector damage caused by low-quality fuel.
The parallel cooling system avoids overheating even under long-term full-load operation in high-temperature environments.

4. Operator Comfort & Controllability

The cab is standard ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure) certified, with internal noise as low as 77 dB(A), far below the industry average.
Equipped with a fully adjustable suspension seat with lumbar support, and an automatic climate control system with 10 air outlets, reducing operator fatigue during long shifts.
Low-effort pilot joysticks require minimal operating force, and the ergonomic layout of control buttons further reduces operation burden.
The 4-inch color LCD monitor displays real-time operating data such as fuel level, oil pressure, working hours and fault codes, making it easy for operators to grasp the equipment status.

5. Safety Features

Optional rear-view camera eliminates reversing blind spots; standard travel alarm and reverse beeper automatically warn surrounding personnel when the machine moves.
High-brightness LED work lights provide wide-range illumination for safe night operation.
Anti-slip steps and handrails on both sides of the fuselage ensure safe access for operators and maintenance personnel.
Dual emergency stop buttons (one inside the cab, one at ground level) cut off power immediately in case of emergency.

6. Maintenance Convenience

All daily maintenance points (oil filter, fuel filter, air filter, etc.) are accessible at ground level, eliminating the need to climb onto the upper structure, saving maintenance time.
The hydraulic oil replacement interval is up to 5000 working hours when using genuine Caterpillar hydraulic oil, and the engine oil replacement interval is 500 working hours, reducing long-term operating costs.
Optional Cat Product Link™ telematics system supports remote monitoring of equipment location, working hours, fuel consumption and fault codes, helping fleet managers optimize scheduling and reduce unplanned downtime.
Optional automatic centralized lubrication system delivers grease to all pivot points regularly, reducing manual maintenance work.

7. Typical Applications

Municipal engineering: road construction, pipeline laying, landscaping, trench digging, urban small demolition
Building construction: foundation excavation, material handling, construction waste clearing
Mining & quarrying: ore loading, site leveling, slope trimming
Water conservancy projects: river dredging, dam construction, irrigation channel excavation
Special scenarios: forestry log handling, landfill waste sorting, emergency rescue

8. Optional Configurations

Multiple boom/stick combinations (5.7m standard boom, 2.5m/2.9m/3.2m stick) to meet different digging depth and reach requirements
Various work tools: hydraulic breaker, log grapple, hydraulic shear, ripper, auger, quick coupler for fast attachment switching
Custom kits: cold start kit for extremely cold regions, high-altitude adjustment kit, heavy-duty undercarriage, dust suppression system for mining sites

The Caterpillar 320D2 is widely recognized as one of the most cost-effective 20-ton excavators on the market, and is the preferred choice for both individual contractors and large construction fleets.

Non flooded

No accident

Original product

Used Caterpillar 320D2 Excavator

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