Used Caterpillar 336D2 Excavator

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🏢 Overview

The CAT 336D2 is a medium-to-large large hydraulic excavator belonging to Caterpillar's D2 Series (Generation 2). It is one of the most popular and versatile excavators in the 30-ton class, widely used in construction, mining, quarrying, demolition, road building, and material handling. It replaced the 336D and offers significant improvements in fuel efficiency, technology, operator comfort, and productivity.

📐 Key Specifications

Parameter	Details
Model	336D2
Series	D2 (Next Generation)
Operating Weight	~74,980 lbs (34,010 kg)
Engine	Cat C7.1 ACERT® Turbo Diesel
Net Power	255 hp (190 kW) @ 2,000 rpm
Torque	682 lb·ft (925 N·m) @ 1,400 rpm
Displacement	439 in³ (7.2 L)
Emissions	EPA Tier 4 Final / EU Stage V (DOC + DPF + SCR)
Fuel Tank Capacity	92.5 gal (350 L)
Track Gauge	8'2" (2,500 mm)
Track Length on Ground	14'10" (4,520 mm)
Transport Width	10'2" (3,100 mm)
Transport Height	10'7" (3,230 mm)

🔧 Hydraulic System

Parameter	Details
Pump Type	2 × Variable Displacement Piston Pumps
System Pressure	5,076 psi (35 MPa)
Total Flow	93 gpm (352 L/min)
Auxiliary Flow (High)	54 gpm (204 L/min)
Auxiliary Flow (Low)	30 gpm (114 L/min)

🪣 Digging Performance

Parameter	Metric	Imperial
Max Digging Depth	7.24 m	23'9"
Max Reach (Ground Level)	10.77 m	35'4"
Max Dumping Height	7.52 m	24'8"
Max Digging Height	10.26 m	33'8"
Max Vertical Wall Dig	7.08 m	23'3"
Ground Clearance	470 mm	18.5"

🪣 Bucket Capacities

Bucket Type	Capacity (ISO)	Capacity (SAE Heaped)
Standard	1.0 – 1.2 m³ (1.3 – 1.6 yd³)	1.2 – 1.4 m³ (1.6 – 1.8 yd³)
Heavy Duty	1.1 – 1.3 m³	1.3 – 1.5 m³
Maximum Digging	1.3 m³ (1.7 yd³)	—

🖥️ Technology & Smart Features

The 336D2 is loaded with Cat's latest technology:

Technology	Description
📱 Cat Grade with 2D/3D	GPS-based grade control for precise digging — flat, slope, or 3D design surfaces. Reduces rework and improves accuracy.
📡 Product Link™ (EL350)	Remote machine monitoring — tracks location, fuel usage, idle time, diagnostic codes, maintenance alerts.
🧠 Cat Payload (Optional)	Real-time bucket load weighing — prevents overloading trucks and improves productivity.
📹 Rear View Camera	Standard — improves safety around the machine.
🎛️ SmartBoom	Optimized boom geometry for better dig forces and faster cycle times.
&co Mode**	Automatically adjusts engine speed to match workload — saves up to 15% fuel.
🔄 Auto Engine Idle	Engine automatically idles when not in use — reduces fuel waste.
🛡️ Auto Swing Lock	Locks swing during travel for safety.
🔊 Cat Detect (Optional)	Radar-based object detection — alerts operator of nearby personnel/objects.

🛋️ Operator Environment (Cab)

The D2 cab is a massive upgrade over the previous generation:

Feature	Details
Cab Type	ROPS/FOPS Certified (Rollover & Falling Object Protection)
Climate Control	Fully automatic AC with heater
Seat	Air-suspension, heated, fully adjustable with armrests
Display	10" (254 mm) Touchscreen monitor with rearview camera
Controls	Electronic joystick controls with programmable buttons
Noise Level	~72 dB(A) — significantly quieter than D1 series
Vibration	Reduced by ~50% compared to previous models
Lighting	LED work lights (front, rear, boom)
Sound System	AM/FM/Bluetooth/USB radio
Storage	Multiple cup holders, phone mount, glove box

🛡️ Safety Features

Feature	Description
✅ ROPS/FOPS Cab	Protects operator from rollover & falling objects
✅ Anti-Two Block System	Prevents boom from hitting house
✅ Auto Swing Lock	Locks swing for travel safety
✅ Rear View Camera	Standard
✅ Cat Detect (Optional)	Radar-based proximity detection
✅ Ground-level Engine Shut-off	Emergency stop accessible from ground
✅ Walk-around Inspection Points	Easy daily check access

💰 Fuel Efficiency

One of the biggest selling points of the D2 series:

Mode	Fuel Savings vs D1
Eco Mode + Auto Idle	Up to 15% fuel savings
Cat Grade (2D/3D)	Reduces rework by up to 40%, saving fuel & time
Cat Payload	Eliminates guesswork — optimal loading = fewer cycles

📊 Typical fuel consumption: 6–9 gal/hr (23–34 L/hr) depending on application.

🆚 336D2 vs 336D (Comparison)

Feature	336D (D1)	336D2 (D2)
Engine	C7 ACERT	C7.1 ACERT
Power	235 hp	255 hp (+8.5%)
Fuel Efficiency	Baseline	~15% better
Cab	Older design	New spacious cab, quieter
Technology	Basic	Grade 2D/3D, Payload, Detect
Emissions	Tier 4 Interim	Tier 4 Final / Stage V
Weight	~74,500 lbs	~74,980 lbs
Serviceability	Standard	Improved access, easier maintenance

🔩 Maintenance

Item	Interval
Engine Oil Change	500 hrs / 6 months
Hydraulic Oil Change	2,000 hrs / 1 year
Fuel Filter	500 hrs
Final Drive Oil	4,000 hrs
Track Inspection	Daily
Grease (Pivot Points)	Every 8–10 hrs

The D2 series features improved service access — ground-level drain valves, side-mounted filters, and easier engine access.

🌍 Typical Applications

Application	Suitability
🏗️ General Excavation	⭐⭐⭐⭐⭐
🪨 Quarrying & Mining	⭐⭐⭐⭐⭐
🛣️ Road Construction	⭐⭐⭐⭐⭐
🏚️ Demolition	⭐⭐⭐⭐ (with HB boom)
🚛 Truck Loading	⭐⭐⭐⭐⭐
🌊 Dredging	⭐⭐⭐ (with long reach)
🌲 Land Clearing	⭐⭐⭐⭐
🕳️ Deep Foundation	⭐⭐⭐⭐

📊 Summary — Why the 336D2?

✅ Strengths	⚠️ Considerations
Excellent fuel efficiency	Higher purchase price than D1
Best-in-class operator comfort	Requires DEF (diesel exhaust fluid)
Advanced technology options	Heavier than some competitors
Strong dig forces & fast cycles	Needs trained operator for Grade tech
Low maintenance costs	Emission system adds complexity
Excellent resale value	—

🏆 Bottom Line

The CAT 336D2 is one of the most productive, fuel-efficient, and technologically advanced 35-ton class excavators on the market. It delivers ~15% better fuel economy, a dramatically improved cab, and cutting-edge technology (Grade 2D/3D, Payload, Detect) that makes it the go-to choice for contractors who want maximum productivity with minimum operating cost.

Would you like me to compare it with a specific competitor (e.g., Komatsu PC360, Hitachi ZX350, Volvo EC380), or go deeper into any specific area? 🚜