Used Caterpillar 320D Excavator

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CATERPILLAR 320D Hydraulic Excavator Detailed Introduction

The Caterpillar 320D is a class-leading 20-ton medium-sized hydraulic excavator developed and manufactured by Caterpillar Inc., the world’s top construction equipment producer. As a core model in Cat’s D-series excavator lineup, it is globally reputed for exceptional reliability, high operation efficiency, low lifecycle cost and strong adaptability to harsh working conditions, making it one of the best-selling excavator models in infrastructure, mining, landscaping and municipal engineering sectors.

1. Core Specifications

Item	Specification
Operating Weight	19,800 kg – 21,000 kg (varies with configuration and attachments)
Engine Model	Cat C6.4 ACERT inline 4-cylinder water-cooled diesel engine
Net Rated Power	103 kW (138 hp) @ 2,000 rpm
Emission Standard	EU Stage IIIA / US EPA Tier 3
Maximum Torque	620 N·m @ 1,500 rpm
Bucket Capacity	0.8 m³ – 1.2 m³ (customizable for special scenarios)
Hydraulic System Type	Load-sensing Positive Flow Control (PFC) system
Main Pump Maximum Flow	2 × 210 L/min
Hydraulic System Working Pressure	35 MPa (350 bar)
Max. Digging Depth (standard arm)	6,710 mm
Max. Digging Radius (standard arm)	9,850 mm
Max. Dumping Height	6,510 mm
Travel Speed	3.5 km/h (low gear) / 5.5 km/h (high gear)
Gradeability	35° (70%)

2. Key Performance Advantages

(1) Fuel-efficient, highly adaptable powertrain

The C6.4 ACERT engine adopts advanced high-pressure common rail fuel injection technology, delivering high torque output at low rotating speeds to reduce unnecessary fuel consumption: its comprehensive fuel efficiency is 5-10% higher than competing products of the same class. It is equipped with a 3-stage fuel filtration system, which can adapt to low-quality diesel in remote construction sites, greatly reducing engine failure risks caused by impure fuel. The electronic control module adjusts fuel supply in real time according to actual load, further optimizing fuel economy under both heavy and light load conditions.

(2) Precise, durable hydraulic system

Caterpillar’s proprietary positive flow control system delivers ultra-fast response and extremely smooth compound movements (simultaneous operation of boom, arm, bucket and swing without lag or jitter), which greatly improves operation accuracy for fine works such as trenching, landscaping and pipeline laying. The hydraulic system is fitted with high-performance seals and multi-stage filtration devices, extending the service life of hydraulic oil to 5,000 working hours, significantly cutting long-term maintenance costs.

(3) Heavy-duty structural design

The boom, arm and main chassis frame are made of high-strength wear-resistant steel, processed with full-penetration welding technology, which can bear long-term heavy load impact in quarries, mining sites and demolition works. The undercarriage is equipped with high-manganese steel track shoes, sealed and lubricated track links, and heavy-duty carrier rollers/idlers, with a service life 20% longer than average models in the same class. Multiple configuration options are available: standard version for general construction, heavy-duty (HD) version for high-load mining scenarios, and long-reach version for deep excavation or high-altitude material handling.

(4) Safe, user-friendly operating cabin

The cabin is ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure) certified, meeting global construction safety standards to effectively protect operators in case of accidents. The fully sealed, sound-insulated design keeps internal noise below 75 dB(A), providing a quiet working environment. It is also fitted with a fully adjustable air-suspension seat, ergonomic pilot control joysticks with low operating force, high-efficiency automatic air conditioning, and a high-definition LCD monitor that displays real-time operation data (fuel level, oil temperature, fault codes, maintenance reminders, etc.) to reduce operating fatigue for long shifts.

(5) Low lifecycle cost

All daily maintenance points (oil filters, fuel filters, hydraulic oil return filters, lubrication points, etc.) are designed to be accessible from the ground, cutting routine maintenance time by 30% compared to older-generation models. Caterpillar’s global after-sales service network provides easy access to genuine spare parts and professional technical support. In addition, the Cat 320D has an extremely high residual value, with second-hand resale prices 15-20% higher than competing models of the same age and working hours.

3. Wide Application Scenarios

The 320D is highly compatible with a wide range of work attachments, including hydraulic breakers, grapples, hydraulic shears, rippers and augers, so it can adapt to diverse construction demands:

Municipal engineering: road construction, pipeline laying, small building demolition, urban greening construction
Building construction: foundation excavation, construction material handling, site leveling
Mining & quarrying: topsoil stripping, ore loading, rock crushing when fitted with breakers
Water conservancy & agriculture: canal excavation, fish pond digging, land reclamation
Logistics & waste treatment: bulk cargo handling, construction waste sorting and transfer

As a benchmark product in the 20-ton excavator segment, the Caterpillar 320D has been widely recognized by users around the world since its launch, and is the preferred choice for both individual contractors and large construction teams.

Non flooded

No accident

Original product

Used Caterpillar 320D Excavator

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