Used Caterpillar 312D2GC Excavator

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CATERPILLAR 312D2 GC Excavator Detailed Introduction

The Caterpillar 312D2 GC is a 12-13 ton class medium-sized crawler excavator under Cat’s D2 product line, where "GC" stands for General Construction. This model is specifically tailored for price-sensitive emerging markets (including Asia-Pacific, Latin America, Africa and Southeast Asia), balancing reliable performance, excellent fuel efficiency and low operating costs, making it a preferred choice for small and medium-sized construction contractors.

1. Engine Performance

The 312D2 GC is equipped with a Caterpillar C4.4 ACERT 4-cylinder diesel engine, optimized for harsh operating environments with low fuel quality:

Rated net power: 72.4 kW (97 hp) at 2000 rpm, meeting EU Stage IIIA / US EPA Tier 3 / China Non-road Stage III emission standards
High-pressure common rail fuel injection system and electronic control module deliver precise fuel supply, reducing fuel consumption by 10-15% compared to the older 312D model
Automatic idle reduction and engine shutdown functions cut unnecessary fuel waste during standby
Upgraded 3-stage fuel filtration system adapts to low-quality diesel, reducing engine failure risks caused by bad fuel
Engine oil change interval reaches 500 working hours, lowering routine maintenance costs

2. Hydraulic System

The Cat proprietary load-sensing electronic hydraulic system ensures smooth operation and high working efficiency:

Optimized flow distribution logic enables coordinated compound movements (simultaneous boom lifting, swinging and arm pulling), suitable for both heavy digging and fine precision works like pipeline laying
Boom and arm regeneration functions reduce hydraulic pump load during component lowering, further saving fuel and speeding up operation cycles
Main valve and pipeline design minimizes pressure loss, improving overall hydraulic system efficiency
Hydraulic oil service life reaches 5000 working hours under normal operating conditions, greatly reducing long-term maintenance expenses
System pressure: 30500 kPa, swing speed: 11.5 rpm, delivering stable power for various working scenarios

3. Operator Comfort & Safety

The cab is designed to reduce operator fatigue during long working hours, and meets global safety standards:

ROPS (Roll-Over Protective Structure) certified cab, ensuring operator safety in case of accidental rollover
Sealed and sound-insulated design keeps internal noise level as low as 78 dB(A), far lower than industry average
Fully adjustable air-suspension seat with lumbar support, matched with ergonomic low-operation-force joysticks, reducing physical strain for long shifts
Multi-functional LCD monitor with multi-language support, displays real-time operating data (fuel consumption, fault codes, maintenance reminders, etc.)
High-efficiency heating and cooling system with multi-position air outlets, and wide frameless glass for 360° panoramic visibility, minimizing blind spots
Front windshield can be fully pushed up and stored, and is equipped with a protective guard for harsh working sites

4. Durability & Structural Design

All core structures are tested for extreme working conditions, ensuring long service life:

High-strength tensile steel welded boom and arm, with reinforced stress points, suitable for continuous heavy-load digging works
X-type lower frame structure, with uniform force distribution, strong impact resistance, and extended service life
Sealed and lubricated track chain, with wear-resistant carrier rollers and idlers, reducing wear during travel and extending track service life by 30% compared to ordinary tracks
Standard bucket is made of high-abrasion steel, with capacity ranging from 0.38 m³ to 0.65 m³, and optional rock buckets, grading buckets are available
All exterior sheet metal parts are thickened and anti-corrosion treated, adapting to harsh construction site environments

5. Serviceability & Fleet Management

The design prioritizes easy maintenance to reduce downtime:

All routine maintenance points (oil filters, fuel filters, air filters, hydraulic oil level gauge, etc.) are accessible at ground level, no need to climb on the machine for daily checks
Optional Cat Product Link™ telematics system, enabling remote monitoring of machine location, working hours, fuel consumption, fault alarms and other data, convenient for fleet management
Caterpillar’s global after-sales service network provides genuine spare parts and professional maintenance support, ensuring stable operation of the machine throughout its life cycle

6. Typical Applications

The 312D2 GC can be equipped with a variety of attachments (hydraulic breaker, grapple, ripper, hydraulic shear, auger, etc.), suitable for a wide range of scenarios:

Municipal works: trench digging, pipeline laying, road maintenance, landscaping
Building construction: foundation excavation, material loading and unloading, construction waste cleaning
Agricultural and water conservancy projects: irrigation ditch digging, reservoir renovation, land consolidation
Small quarry and mining works: light material handling, site leveling

7. Key Specifications

Parameter	Specification
Operating weight	12,400 kg – 13,600 kg (depending on configuration)
Max digging depth	5,740 mm
Max digging reach (ground level)	8,790 mm
Max dumping height	6,180 mm
Travel speed	3.4 km/h (low) / 5.5 km/h (high)
Gradeability	35° (70%)
Fuel tank capacity	250 L
Hydraulic tank capacity	120 L

Non flooded

No accident

Original product

Used Caterpillar 312D2GC Excavator

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