Used Caterpillar 307.5Excavator

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The Cat 307.5 (also known as 307.5 CR and 307.5 E2) is a compact/mini hydraulic excavator in Caterpillar's lineup, designed for versatility in tight job sites. It replaced the legendary Cat 307 and comes in two main variants:

Feature	307.5 CR (Compact Radius)	307.5 E2 (Standard)
Operating Weight	~7,250 kg (15,983 lb)	~7,400 kg (16,314 lb)
Max Digging Depth	4,020 mm (13.2 ft)	4,220 mm (13.8 ft)
Max Reach (Ground)	5,930 mm (19.5 ft)	6,520 mm (21.4 ft)
Bucket Capacity	0.12 – 0.25 m³ (0.16–0.33 yd³)	0.12 – 0.38 m³ (0.16–0.50 yd³)
Blade Width	1,830 mm (72 in)	1,830 mm (72 in)
Track Width (Adjustable)	1,400 – 2,000 mm (55–79 in)	1,400 – 2,000 mm (55–79 in)

🔧 1. ENGINE & POWER

Specification	Details
Engine Model	Cat C3.3B DI Turbo
Type	4-cylinder, inline, turbocharged diesel
Displacement	3.3 L (201 in³)
Rated Power	57 hp (43 kW) @ 2,200 rpm
Emissions	Tier 4 Final / Stage V (EPA & EU compliant)
Fuel Tank	~130 L (34.3 gal)
Cooling System	Pressurized, with fan drive

✅ The C3.3B is a proven, fuel-efficient engine known for reliability and low maintenance costs.

& 2. HYDRAULIC SYSTEM

Feature	Details
Pump Type	Variable displacement axial piston
Max Flow	~148 L/min (39.1 gpm)
Operating Pressure	34,500 kPa (5,000 psi)
Auxiliary Hydraulics	2 circuits (flow-sharing)
Aux. Flow Rate	~68 L/min (18 gpm) per circuit
Quick Coupler Ready	✅ Yes (factory-installed or optional)

✅ The flow-sharing system allows simultaneous operation of attachments without sacrificing performance.

🏗️ 3. UNDERCARRIAGE & MOBILITY

Feature	Details
Track Type	Steel tracks with rubber pads (optional)
Track Width	Adjustable hydraulic — 1,400 to 2,000 mm
Ground Pressure	~35 kPa (5.1 psi)
Travel Speed	0 – 4.7 km/h (0 – 2.9 mph)
Gradeability	70% (35°)
Dozer Blade	1,830 mm (72 in) wide, angle & float adjust
Swing System	Reduced tail swing (CR) / Zero tail swing (E2)

✅ The adjustable track width is a major advantage — narrow for tight spaces, wide for stability.

🖥️ 4. CAB & OPERATOR COMFORT

Feature	Details
Cab Type	Enclosed ROPS/FOPS certified
Seat	Suspended, adjustable, with armrests
Climate Control	Heater & air conditioning (standard)
Display	7" (178 mm) touchscreen monitor
Camera System	Rearview camera (standard on most models)
Controls	Joystick with proportional control
Noise Level	~72 dB(A) — very quiet for its class
Lighting	LED work lights (front & rear)

✅ The 307.5 is one of the most comfortable mini excavators on the market — designed for all-day operation.

🛠️ 5. SMART TECHNOLOGY & CONNECTIVITY

Technology	Description
Cat Product Link™	Telematics — real-time machine monitoring, location tracking, diagnostics
Cat GRADE (2D)	Optional — guidance system for grading & excavation accuracy
Cat PAYLOAD (2D)	Optional — real-time bucket payload weighing
E-Fence	Geofencing — alerts when machine leaves designated area
Remote Flash	Over-the-air software updates
Security	CAT Security (PIN code, immobilizer)

📐 6. DIMENSIONS (Approximate)

Dimension	307.5 CR	307.5 E2
Length (w/o bucket)	5,980 mm (19.6 ft)	6,350 mm (20.8 ft)
Height (to cab top)	2,600 mm (8.5 ft)	2,600 mm (8.5 ft)
Width (min tracks)	1,400 mm (4.6 ft)	1,400 mm (4.6 ft)
Width (max tracks)	2,000 mm (6.6 ft)	2,000 mm (6.6 ft)
Tail Swing Radius	1,490 mm (4.9 ft)	1,110 mm (3.6 ft) — Zero Tail Swing

🎯 7. COMMON ATTACHMENTS

Attachment	Use Case
🪣 Buckets (120mm – 600mm)	Digging, trenching, grading
🔨 Hydraulic Breaker/Hammer	Concrete demolition, rock breaking
🪚 Hydraulic Thumb	Grapple, sort material
🔧 Auger Drive	Post holes, fence posts
🌿 Rake	Leveling, debris removal
🧹 Sweeper	Site cleanup
🪓 Compactor Plate	Soil/gravel compaction
🔌 Quick Coupler	Fast attachment changeover

📊 8. PERFORMANCE SUMMARY

Metric	Value
Fuel Consumption	~8–12 L/hr (depending on workload)
Service Interval	500 hrs (engine oil), 1,000 hrs (hydraulic oil)
Max Digging Force (Boom)	~36 kN (8,100 lbf)
Max Digging Force (Arm)	~27 kN (6,100 lbf)
Max Digging Force (Bucket)	~40 kN (9,000 lbf)
Swing Speed	10.5 rpm
Lift Capacity (at full reach)	~1,700 kg (3,750 lb)

✅ 9. KEY ADVANTAGES

Advantage	Explanation
🏆 Reliability	Cat build quality — industry-leading uptime
📏 Compact Size	Fits through gates, narrow trenches, indoor work
🔄 Zero/Reduced Tail Swing	Works close to walls & structures
🎛️ Adjustable Tracks	Ultimate versatility — tight + stable
🧠 Smart Tech	Product Link, Grade, Payload ready
🔇 Low Noise	Can work in residential areas
💰 Low Operating Cost	Fuel-efficient C3.3B, long service intervals
🔧 Easy Maintenance	Ground-level service points, wide-open engine compartment

🆚 10. COMPETITORS COMPARISON

Machine	Weight	Power	Dig Depth
Cat 307.5 CR	7,250 kg	57 hp	4,020 mm
Komatsu PC78US-11	7,800 kg	53 hp	3,980 mm
John Deere 75G	7,760 kg	51 hp	4,080 mm
Kubota KX080-4	7,850 kg	51 hp	4,110 mm
Volvo ECR88	8,200 kg	58 hp	4,320 mm

📈 The Cat 307.5 stands out for its cab comfort, technology integration, and dealer support network.

🏁 SUMMARY

The Caterpillar 307.5 is a premium compact excavator in the 7-ton class, perfect for:

Application	✅
🏗️ Residential construction	✅
🌳 Landscaping & gardening	✅
🔌 Utility/trenching work	✅
🏚️ Small demolition	✅
🛤️ Road & pavement work	✅
🏭 Indoor/confined spaces	✅

It combines Cat's legendary durability with modern technology, operator comfort, and exceptional versatility — making it one of the best-selling mini excavators in the world. 🐱🚜

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