Used Caterpillar 312D2GCExcavator

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📌 Overview

The Cat 312D2 GC is a mid-size hydraulic excavator from Caterpillar's D2 Series (2nd Generation). The "GC" stands for "General Construction", indicating it is configured for versatile general construction tasks such as digging, grading, utility work, landscaping, and road building. It sits in the 12-tonne class and is one of Cat's most popular models worldwide.

Parameter	Specification
Series	D2 (2nd Generation)
Class	12–13 tonne (Medium)
Configuration	GC – General Construction
Manufacturer	Caterpillar Inc.
Emission Standard	Tier 4 Final / EU Stage V

🔧 1. Engine

Spec	Detail
Model	Cat C4.4 ACERT® Diesel Engine
Type	4-cylinder, turbocharged & aftercooled
Displacement	4.4 litres (268 cu in)
Rated Power	84 hp (62.6 kW) @ 2,200 rpm
Max Torque	~310 Nm (229 lb-ft) @ 1,400 rpm
Fuel Tank	~220 L (58 gal)
Emissions	Tier 4 Final / Stage V (no DEF/AdBlue required — uses DOC + DPF + SCR in some regions)

✅ The C4.4 ACERT is known for fuel efficiency, reliability, and low maintenance costs.

& 2. Hydraulic System

Spec	Detail
Pump Type	Variable displacement piston pumps (2 pumps)
Total Flow	~2 × 113 L/min (2 × 30 gpm)
System Pressure	350 bar (5,076 psi)
Auxiliary Flow	~42 L/min (11 gpm) — for attachments
Hydraulic Tank	~110 L (29 gal)

📐 3. Dimensions & Weight

Parameter	Metric	Imperial
Operating Weight	12,100 – 12,900 kg	26,675 – 28,440 lb
Transport Length	~7,560 mm	24.8 ft
Transport Width	~2,490 mm	8.2 ft
Transport Height	~2,980 mm	9.8 ft
Track Width	450 mm (standard)	17.7 in
Ground Clearance	~440 mm	17.3 in
Tail Swing Radius	~2,240 mm	7.35 ft

🏗️ 4. Digging Performance

Performance Metric	Metric	Imperial
Max Digging Depth	~5,730 mm	18.8 ft
Max Reach (Ground Level)	~8,850 mm	29.0 ft
Max Dumping Height	~6,870 mm	22.5 ft
Max Digging Reach (10 ft level)	~8,380 mm	27.5 ft
Max Vertical Wall Dig	~4,560 mm	15.0 ft
Dozer Blade Capacity	Optional (straight blade ~2,440 mm / 8 ft)	—

🪣 Bucket Capacities (Standard)

Bucket	Capacity (m³)	Capacity (yd³)
GP (General Purpose)	0.23 – 0.55	0.30 – 0.72
600 mm (24 in)	0.23	0.30
800 mm (32 in)	0.34	0.45
900 mm (36 in)	0.42	0.55
1,000 mm (40 in)	0.50	0.65
1,200 mm (48 in)	0.55	0.72

🖥️ 5. Cab & Operator Environment

Feature	Detail
Cab Type	Enclosed cab with ROPS/FOPS certified
Seat	Air-suspended, heated, adjustable
Climate Control	Heater + Air Conditioning (standard on most markets)
Display	7" (178 mm) LCD touchscreen monitor
Controls	Joystick with programmable buttons
Camera	Rear-view and side-view cameras (standard)
Sound Level	~72 dB(A) inside cab
Lighting	LED working lights (front, rear, boom)
USB/Bluetooth	Available for media & connectivity

🤖 6. Technology & Smart Features

Technology	Description
Cat Product Link™	Real-time machine monitoring, location tracking, diagnostics via web/app
Cat GRADE with 2D	On-board grade control system (2D or 3D optional) — reduces rework by up to 45%
Cat Payload	Real-time bucket load weighing (optional)
Eco Mode	Automatically reduces engine speed when idle — saves up to 15% fuel
Auto-Idle	Engine automatically idles when controls aren't used
Security	Cat Security system with immobilizer & alarm
Cat App	Remote monitoring & diagnostics via smartphone

🔩 7. Undercarriage & Track System

Feature	Detail
Track Type	Steel tracks with triple grouser (optional single or double)
Track Width	450 mm (17.7 in) standard
Track Shoe Width	600 mm (23.6 in)
Number of Rollers	5 per side
Ground Pressure	~45 kPa (6.5 psi)
Undercarriage Options	450 mm / 600 mm / 800 mm triple grouser

🆚 8. Comparison: 312D2 GC vs Competitors

Feature	Cat 312D2 GC	Komatsu PC128US-11	Doosan DX140LCR-5
Weight	~12,100 kg	~12,800 kg	~14,000 kg
Power	84 hp	87 hp	96 hp
Max Depth	5.73 m	5.85 m	5.95 m
Max Reach	8.85 m	8.70 m	8.80 m
Emission	Tier 4 Final	Stage V	Stage V
Tech	Product Link + GRADE	KOMTRAX + 3D GPS	DoosanCONNECT

🏆 The 312D2 GC is known for its best-in-class fuel efficiency, dealer network, and resale value.

💰 9. Approximate Pricing (2024)

Region	Estimated Price (USD)
USA	$115,000 – $145,000
Europe	€110,000 – €140,000
Asia/Middle East	$100,000 – $130,000
Australia	AUD $180,000 – $220,000

Prices vary by configuration (cab, A/C, grade control, bucket, etc.)

✅ 10. Key Advantages

✅ Advantage	Explanation
🔋 Fuel Efficient	Up to 15% less fuel vs previous D series
🛠️ Low Maintenance	Extended service intervals (500/2,000 hr)
📡 Connected Technology	Product Link + GRADE for productivity
🏗️ Versatile	GC config suits most general construction jobs
🔄 High Resale Value	Cat holds ~60-65% value after 5 years
🌍 Global Dealer Network	170+ countries, parts availability

📋 11. Typical Applications

Application	Suitability
🏗️ General construction	⭐⭐⭐⭐⭐
🛣️ Road building & grading	⭐⭐⭐⭐⭐
🔌 Utility work (pipe laying)	⭐⭐⭐⭐⭐
🌳 Landscaping	⭐⭐⭐⭐
🏚️ Demolition (with hammer)	⭐⭐⭐⭐
🏔️ Mining (light duty)	⭐⭐⭐
🪨 Quarrying	⭐⭐⭐

🔧 12. Common Attachments

Attachment	Use
🔨 Hydraulic Breaker (Hammer)	Demolition, rock breaking
🪝 Quick Coupler	Fast attachment changeover
🥄 Tiltrotator	Precision grading, pipe laying
🪵 Grapple	Log handling, waste sorting
🔩 Thumb	Material handling, precision digging
🔄 Rotating Grapple	Tree handling, scrap
🪣 Clean-up Bucket	Fine grading, finishing work

📊 Summary Table

Specification	Value
Model	312D2 GC
Engine	Cat C4.4 ACERT, 84 hp
Operating Weight	~12,100–12,900 kg
Bucket Range	0.23–0.55 m³
Max Dig Depth	5.73 m (18.8 ft)
Max Reach	8.85 m (29.0 ft)
Emission	Tier 4 Final / Stage V
Technology	Product Link™, Cat GRADE, Eco Mode
Price (approx.)	$115K–$145K (USD)

🎯 Bottom Line: The Cat 312D2 GC is one of the best-selling mid-size excavators in the world, offering an excellent balance of power, fuel efficiency, technology, and versatility for general construction work. It's a reliable workhorse with strong resale value and unmatched dealer support.

Would you like more details on any specific aspect — such as maintenance schedule, fuel consumption, or comparison with the 312D2 L (Long Reach)? 🚜