The used Cat 320GC is a medium-sized excavator that strikes an effective balance between performance and investment cost. This 20-ton class machine prioritizes reliability, fuel efficiency, and ease of maintenance—making it an first choice for companies involved in earthmoving, equipment rental, or small-to-medium-scale construction projects. This article examines the used Cat 320GC by analyzing its technical specifications, suitable operating conditions, core advantages, and the reasons behind its strong market popularity.

Machine Overview
The Caterpillar Cat 320GC is a 20-tonne class medium-sized tracked hydraulic excavator, with an operating weight ranging from 20,400 to 22,000 kg. The "GC" designation stands for "General Construction." While it shares the same undercarriage, engine, and many structural components as the standard Cat 320 model of the same generation, it features a streamlined configuration—omitting certain advanced electro-hydraulic control functions and intelligent assistance systems—thereby reducing both the initial purchase cost and the complexity of daily operation.

Technical Specifications

• Engine Model: Cat® C4.4
• Net Power (ISO 9249): 107 kW / 143 hp
• Operating Weight: Approx. 20,400 kg (45,000 lb)
• Maximum Digging Depth: 6,630 mm (21.8 ft)
• Maximum Reach at Ground Level: 9,860 mm (32.3 ft)
• Bucket Capacity: 1.0 m³ (1.31 yd³)
• Main System Maximum Flow: 429 L/min (113 gal/min)
• Swing Speed: 11.6 rpm
• Fuel Tank Capacity: 345 L (86.6 gal)

What Kind of Working Environment is it Suited for?
The 320GC is not designed for mining or large-scale rock excavation, but it excels in the following scenarios:

• Earthmoving operations. Whether it involves excavating foundation pits for construction, digging trenches for pipelines, or site leveling, the machine's 1m³ bucket and maximum digging depth of approximately 6.6 meters are sufficient for most routine tasks. Its hydraulic system is optimized for high-speed, efficient operation.
• Municipal projects and road construction. With a tail swing radius of approximately 2.83 meters, it offers good maneuverability when working alongside roads or in confined spaces, requiring minimal operating area.
• It is suitable for environments at altitudes below 3,000 meters, capable of operating in ambient temperatures as high as 52°C, and features a cold-start capability down to -32°C. This ensures the machine remains operational across a wide range of climates—from the sweltering job sites of Southeast Asia to the frigid regions of Central Asia.

Why are More and More People Choosing Used Cat 320GC Excavator? 

1. Ease of maintenance and repair. Caterpillar has an extensive global after-sales network for construction machinery. Parts for a used Cat excavator—such as filters and hydraulic components—are readily available through any Cat dealer or independent parts supplier. For contractors, for whom "time is money," the prospect of "downtime while waiting for parts" represents a cost far more daunting than the initial purchase price.
2. Convenience of not requiring DEF (Diesel Exhaust Fluid). Some 320GC models utilize technology that eliminates the need for Diesel Exhaust Fluid (DEF). This offers a practical advantage for machines exported to regions with less stringent emission regulations: there is no DEF tank, no fluid consumption, and no risk of failure for associated sensors or pumps. Even in markets with stricter emission standards, the 320GC's emission system is designed to operate without the need for "regeneration" downtime, allowing the machine to keep working without interruption.
3. Structural durability. The undercarriage and structural components of the Cat 320GC have received high praise from users. When purchasing used equipment, the previous owner's usage history and maintenance records are key indicators of residual value; the 320GC's proven durability gives second-hand buyers greater confidence.

Conclusion
The Cat 320GC has gained increasing popularity in the used excavator market because it precisely meets the needs of a specific group of users: those who require a reliable, fuel-efficient, and easy-to-maintain mid-sized excavator, but who do not wish to pay for high-end. Opting for a used unit further lowers the barrier to entry and reduces the initial investment cost.
For overseas buyers in search of a 20-ton class used excavator, the 320GC is well worth considering. When evaluating a specific machine, it is advisable to focus on the condition of the hydraulic system, the wear level of the undercarriage, and whether a complete maintenance history is available. Hefei Yingju Machinery Co., Ltd., a company with extensive experience in the export of construction machinery, typically offers a variety of used Cat equipment across different model years and configurations. With relatively transparent information regarding the origin and condition of their machines, they can serve as a useful reference point for understanding current market availability.