Used Caterpillar 303.5EExcavator

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📌 Overview

The Cat® 303.5E2 CR (Compact Radius) is a 3.5-tonne class mini excavator manufactured by Caterpillar Inc. It is one of the most popular compact excavators in the world, designed for versatility, efficiency, and operation in tight spaces. It replaced the earlier 303.5E model.

Feature	303.5E (Old Gen)	303.5E2 CR (Current Gen)
Engine	Cat C1.1 ACERT	Cat C1.1 ACERT DIT
Weight	~3,400 kg	3,520–3,730 kg
Emission	Tier 4 Final	Stage V / Tier 4 Final
Cab	Basic	Advanced with LCD monitor

🔧 Engine

Specification	Detail
Engine Model	Cat® C1.1 ACERT® DIT
Type	3-cylinder, turbocharged, direct injection diesel
Displacement	1.1 L (67 cu in)
Rated Power	24.8 HP (18.5 kW) @ 2,200 rpm
Emission Standard	EU Stage V / EPA Tier 4 Final
Fuel Tank Capacity	~50 L (13.2 gal)
Cooling System	Liquid-cooled with auto-reversing fan

✅ No DPF (Diesel Particulate Filter) required — reduces maintenance complexity.

⚙️ Hydraulic System

Specification	Detail
Pump Type	Variable displacement piston pump
Max Flow	55 L/min (14.5 gpm)
Max System Pressure	210 bar (3,046 psi)
Auxiliary Hydraulic Flow	22 L/min (5.8 gpm) — for attachments
Hydraulic Couplers	Quick coupler ready (optional)

📐 Operating Dimensions & Performance

Specification	Value
Operating Weight	3,520 – 3,730 kg (7,760 – 8,223 lb)
Max Digging Depth	3.87 m (12 ft 8 in)
Max Reach (Ground Level)	5.72 m (18 ft 9 in)
Max Digging Height	5.93 m (19 ft 5 in)
Max Dump Height	4.18 m (13 ft 9 in)
Max Digging Force (Boom)	20.6 kN (4,630 lbf)
Max Digging Force (Arm)	14.5 kN (3,260 lbf)
Tail Swing Radius	1,340 mm (4 ft 5 in) — Zero Tail Swing! ✅
Blade Width	1,520 mm (5 ft)

⭐ The zero tail swing design is a huge advantage in confined job sites — the upper structure doesn't swing beyond the tracks.

🛞 Undercarriage Options

Track Width	Application
180 mm (7 in)	Indoor / very tight spaces
300 mm (12 in)	General purpose ⭐ Most popular
400 mm (16 in)	Soft ground / stability
450 mm (18 in)	Heavy-duty / muddy conditions

Rubber tracks available (reduces damage to surfaces, road-legal in some regions)
Steel tracks also available

🖥️ Cab & Operator Comfort

Feature	Detail
Cab Type	Enclosed ROPS/FOPS certified
Climate Control	Heater & A/C (standard on many configs)
Display	7-inch LCD monitor with rearview camera 📹
Seat	Suspended, adjustable, heated (optional)
Controls	Joystick with proportional control
Sound Level	~72 dB(A) — relatively quiet
Lighting	LED work lights

🔩 Boom & Stick Configurations

Configuration	Dig Depth	Reach
Standard Boom + Stick	3.87 m	5.72 m
Long Reach Boom + Stick	4.8 m	6.7 m
Short Stick Option	3.2 m	4.2 m (for very tight areas)

🛠️ Attachment Versatility (Quick Coupler)

The 303.5E2 is designed for quick attachment change:

Attachment	Use
🪣 Bucket (200–450 mm)	General digging
🔨 Hydraulic Breaker	Demolition / rock breaking
🪓 Hydraulic Thumb	Material handling / logging
🔩 Auger	Post hole drilling
🧹 Grading Bucket	Leveling / grading
🪚 Ripper	Hard ground breaking
🔌 Pallet Forks	Material transport
🧹 Brush Cutter	Land clearing
❄️ Snow Blade	Winter maintenance

🏗️ Typical Applications

Sector	Use Cases
🏙️ Construction	Foundation work, trench digging, utility installation
🌳 Landscaping	Tree planting, grading, garden excavation
🔌 Utilities	Cable/pipe trenching, sewer work
🏠 Residential	Driveways, pool digging, basement excavation
🏭 Demolition	Small-scale demolition with breaker
🌾 Agriculture	Drainage, fence line digging
❄️ Winter	Snow removal with blade

📊 Key Advantages

✅ Advantage	Explanation
⭐ Zero Tail Swing	Works right up to walls/fences
⭐ Compact Size	Fits through standard gates (~700 mm)
⭐ Fuel Efficient	~3–4 L/hr consumption
⭐ Low Maintenance	Simple engine, no DPF
⭐ Wide Track Options	Adaptable to any terrain
⭐ Easy Transport	Fits on a standard trailer
⭐ Resale Value	Cat brand = strong residual value

📈 Specifications Summary Table

Parameter	Value
Model	Cat 303.5E2 CR
Engine	Cat C1.1 ACERT DIT, 24.8 HP
Weight	3,520–3,730 kg
Dig Depth	3.87 m
Reach	5.72 m
Tail Swing	Zero (1,340 mm)
Hydraulic Flow	55 L/min
Track Width	180–450 mm
Fuel Tank	~50 L
Emission	Stage V / Tier 4 Final

💰 Approximate Pricing (2024)

Region	Price Range (USD)
🇺🇸 USA	$45,000 – $65,000
🇪🇺 Europe	€40,000 – €60,000
🌏 Asia	$40,000 – $55,000

Prices vary by configuration, attachments, and region.

🆚 Competitors

Machine	Weight	Power	Dig Depth
Cat 303.5E2	3.5T	24.8 HP	3.87 m
Kubota KX033-4	3.3T	24.7 HP	3.45 m
Komatsu PC35MR-3	3.5T	24.1 HP	3.45 m
John Deere 35G	3.7T	24.8 HP	3.66 m
Volvo ECR35D	3.6T	26.5 HP	3.45 m

🏆 Verdict

The Cat 303.5E2 CR is arguably the best-in-class 3.5-tonne mini excavator, offering:

✅ Excellent dig depth for its class
✅ Zero tail swing for tight spaces
✅ Fuel-efficient and low-maintenance
✅ Strong Cat dealer network & resale value
✅ Highly versatile with quick coupler system

🎯 Best for: Contractors, landscapers, utility workers, and rental companies needing a reliable, compact, and productive mini excavator.

Would you like more details on any specific aspect — such as maintenance schedule, attachment recommendations, or comparison with a specific competitor? 🚜