Used Caterpillar 312D2GC Excavator

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Detailed Introduction to CATERPILLAR 312D2GC Hydraulic Excavator

The Caterpillar 312D2GC is a 12-ton class midi hydraulic excavator belonging to Caterpillar's D2GC (General Construction) product line. It is tailored for global construction markets that prioritize high reliability, low operating cost and easy maintenance, combining Caterpillar's proven core technology with cost-optimized design, and is especially suitable for light to medium-duty non-extreme working scenarios.

1. Engine Performance

The 312D2GC is equipped with a Caterpillar C4.4 ACERT 4-cylinder diesel engine, with the following core features:

Net power output of 72 kW (97 hp) at 2200 rpm, meeting EU Stage IIIA / US EPA Tier 3 emission standards, no complex aftertreatment system is required, which reduces post-maintenance costs.
Optimized high-pressure common rail fuel system has strong tolerance to low-quality diesel, effectively reducing fuel system failure risks in regions with unstable fuel supply.
Built-in automatic engine speed control and idle shutdown function, delivering up to 15% higher fuel efficiency than the previous generation 312D model under partial load conditions, significantly cutting long-term fuel expenditure.

2. Hydraulic System

It adopts Caterpillar's mature load-sensing flow-sharing hydraulic system, ensuring precise and responsive operation while minimizing energy loss:

Total main pump flow reaches 150 L/min, with standard bucket digging force up to 96 kN and stick digging force up to 65 kN, meeting construction demands in compacted soil and light rock conditions.
Two operation modes are available for switching: Power mode provides maximum output for heavy digging tasks, while Economy mode adjusts pump output to reduce fuel consumption for light work such as grading and material handling.
Optional 1 or 2 auxiliary hydraulic circuits support a wide range of work tools including hydraulic breakers, grapples, augers and compactors, greatly expanding the machine's application scenarios.

3. Operator Comfort & Safety

The cab is designed in line with Caterpillar's ergonomic standards, ensuring safety and reducing fatigue during long shifts:

The cab is certified with ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure), providing effective protection for operators in case of rollover or falling debris.
The internal operating noise is controlled at 76 dB(A), equipped with a fully adjustable air-suspension seat with lumbar support, and a high-efficiency heating/cooling air conditioning system with multi-directional vents.
The ergonomic control layout and large LCD monitor display real-time machine status including fuel level, hydraulic oil temperature and fault codes; an optional rearview camera eliminates reversing blind spots.

4. Structural Durability

All core structural components are designed for long service life under high load:

The main frame, boom and stick adopt heavy-duty box-section structure made of high-tensile steel, which has passed strict fatigue tests to adapt to long-term uneven operation.
Sealed and lubricated track chain reduces wear between parts, extending track service life by 30% compared with non-lubricated tracks; optional reinforced track shoes are available for rocky construction sites.
The welded upper frame adopts reinforced mounting points for the boom, swing mechanism and cab, ensuring structural stability during high-load digging operations.

5. Service & Maintenance

As a core advantage of the GC series, the 312D2GC greatly reduces maintenance difficulty and cost:

All routine service points (fuel filter, oil filter, hydraulic filter, air filter, etc.) are centrally arranged and accessible from ground level, cutting daily inspection and maintenance time by 20%.
Extended service intervals: engine oil and filter replacement every 500 working hours, hydraulic oil and filter replacement every 4000 working hours, reducing downtime.
Optional Cat Product Link telematics system supports remote monitoring of machine location, working hours, fuel consumption and fault alerts, helping fleet managers carry out proactive maintenance. It is also supported by Caterpillar's global after-sales network, with genuine spare parts readily available in most regions.

6. Typical Applications

The 312D2GC is suitable for a wide range of light and medium construction scenarios:

Urban municipal construction: trench digging, pipe laying, road repair
Landscaping: site clearing, terrain shaping, garden construction
Small civil construction: residential foundation excavation, construction material handling
Small-scale demolition: with hydraulic breaker attachment
Agricultural engineering: farmland renovation, irrigation ditch digging
Waste management: waste sorting, transfer station material handling

7. Core Technical Specifications

Parameter	Specification
Operating weight	11.6 – 12.8 t (depends on configuration)
Standard bucket capacity	0.38 – 0.65 m³
Max travel speed	5.5 km/h (high) / 3.4 km/h (low)
Max swing speed	11.5 rpm
Max digging depth (standard stick)	5.7 m
Max digging reach	8.7 m
Fuel tank capacity	250 L
Hydraulic oil tank capacity	120 L

Summary

The Caterpillar 312D2GC excavator balances strong working performance, low total cost of ownership and high reliability, making it a cost-effective choice for small and medium-sized construction contractors, especially for users pursuing high return on investment in non-extreme working conditions.

Non flooded

No accident

Original product

Used Caterpillar 312D2GC Excavator

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