Used Caterpillar 320D Excavator

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Detailed Introduction to CATERPILLAR 320D Hydraulic Excavator

The Caterpillar 320D is a class-leading 20-ton medium-sized crawler excavator developed by Caterpillar Inc., the world's top construction machinery manufacturer. As a star product in Caterpillar's D-series excavator lineup, it inherits the brand's legendary durability, while optimizing power efficiency and operational comfort, making it one of the most widely used excavator models in global construction markets.

1. Core Overview

The 320D is positioned as a versatile heavy-duty workhorse for medium to large construction scenarios. It balances strong digging performance, low operating cost and high residual value, and is compatible with a wide range of work attachments to adapt to diversified construction demands. It has been widely recognized by construction teams, rental fleets and mining operators worldwide since its launch.

2. Power System

The 320D is equipped with a Caterpillar proprietary C6.4 ACERT (Advanced Combustion Emission Reduction Technology) inline 6-cylinder diesel engine:

Rated net power: 110 kW (148 hp) at 2000 rpm, meets Tier 3 / Stage IIIA emission standards
High torque reserve of up to 35%, delivers stable output even under heavy load, high-altitude or low-temperature working conditions
Optimized fuel injection system reduces fuel consumption by 10~15% compared with same-class competing models, without sacrificing digging force
Excellent cold start performance, supports normal start-up at ambient temperatures as low as -20℃ without auxiliary devices.

3. Hydraulic System

It adopts Caterpillar's mature load-sensing hydraulic system, delivering precise and responsive operation experience:

Total main pump flow: 252 L/min (2×126 L/min), maximum system pressure: 35 MPa
Smooth compound action control: supports synchronous operation of boom lifting, swinging and bucket digging without lag, greatly improves operation efficiency
Equipped with anti-drift valve for boom and stick, avoids accidental drop of working devices to ensure construction safety
Extended hydraulic oil service interval of 5000 working hours, reduces long-term maintenance cost.

4. Key Operating Specifications

Parameter	Specification
Operating weight	20300 kg ~ 21800 kg (varies by configuration)
Standard bucket capacity	0.8 m³ ~ 1.2 m³
Maximum digging depth	6710 mm
Maximum digging reach	9850 mm
Maximum dumping height	6510 mm
Swing speed	11.5 rpm
Travel speed	3.1 km/h (low) / 5.5 km/h (high)
Gradeability	70% (35°)
Bucket breakout force	140 kN
Stick breakout force	106 kN

5. Structural Durability

The 320D is designed for harsh working conditions, with a service life 20% longer than average same-class models:

Boom, stick and main frame are made of high-tensile strength steel, welded with full penetration process, and have passed 10000+ hours of heavy load impact test
Undercarriage supports optional standard or heavy-duty configuration: high-strength track shoes, sealed lubricated track chains and oversized carrier rollers / idlers extend undercarriage service life by 30%
Oversized swing bearing with double seal structure, effectively prevents dust and impurities from entering, reduces wear during long-term operation.

6. Operator Comfort & Safety

The cab is certified with ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure), ensuring operator safety in case of rollover or falling construction debris
Spacious cab with fully adjustable suspension seat, low-effort joysticks, and multi-function LCD monitor that displays real-time operating data (fuel consumption, fault warning, working hours, etc.)
Ultra-low interior noise of only 75 dB(A), high-performance air conditioning system with 8 air outlets, and multiple storage compartments, greatly reduces operator fatigue during long shifts
Full-view tempered glass design with small blind area, equipped with rearview camera (optional) for safer reversing and operation.

7. Maintenance & Cost Efficiency

All daily maintenance points (engine oil dipstick, fuel filter, air filter, etc.) are accessible from the ground, no need to climb on the machine for routine inspection
Standard Caterpillar Product Link telematics system: supports remote monitoring of machine location, operating status, fuel consumption and fault warning, greatly improves fleet management efficiency and reduces unplanned downtime
Global Caterpillar dealer network provides 24/7 after-sales support and original spare parts supply, the model has an extremely high residual value, with second-hand resale price 15~20% higher than competing models of the same age.

8. Application Scenarios

The Caterpillar 320D adapts to almost all medium construction scenarios, including:

Municipal engineering, road and bridge construction, real estate development
Quarry mining, hard rock excavation, material handling
Water conservancy projects, forestry logging, small demolition works
It can be fitted with optional attachments including hydraulic breaker, log grapple, ripper, auger, etc., to expand its function coverage.

Core Advantages Summary

Industry-leading reliability and low failure rate under heavy load conditions
Outstanding fuel efficiency, reduces long-term operating cost
Precise and smooth operation, extremely friendly to operators
High residual value and perfect global after-sales supportIt is widely recognized as the benchmark model in the 20-ton excavator segment.

Non flooded

No accident

Original product

Used Caterpillar 320D Excavator

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