Used Caterpillar 303.5E Excavator

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Caterpillar 303.5E CR Mini Hydraulic Excavator

The Caterpillar 303.5E CR is a 3.5-ton class compact excavator developed by Caterpillar Inc., designed for high efficiency, maneuverability and durability in narrow-space operation scenarios. As one of the best-selling models in Cat’s mini excavator lineup, it is widely favored by contractors, rental fleet operators and individual users for its reliable performance, low operating cost and high residual value.

1. Core Performance

Powered by the Cat C1.1 turbocharged diesel engine, the 303.5E CR delivers a rated net power of 24.2 kW (32.5 hp) at 2,400 rpm, meeting Tier 4 Final/EU Stage V emission standards (Tier 3 versions are available for markets with lower emission requirements). The engine features high low-end torque, strong adaptability to high altitude and high temperature environments, and low fuel consumption, with a 55L fuel tank supporting 8-10 hours of continuous operation under common working conditions.

Equipped with Cat’s proprietary load-sensing hydraulic system, the excavator provides precise flow distribution according to operation demands, ensuring smooth compound movements (such as simultaneous digging, swinging and lifting) with no lag. The pilot control system offers light, responsive handle feedback, reducing operator fatigue during long shifts. Key performance parameters include:

Bucket breakout force: 30.1 kN
Stick digging force: 20.2 kN
Swing speed: 9 rpm
Travel speed (low/high): 2.4 km/h / 4.8 km/h
Maximum traction force: 37 kN

The standard boom offset function (left 75°, right 56°) and 1,220 mm ultra-short tail swing radius allow the machine to work close to walls, trenches or obstacles without collision, perfectly adapting to narrow construction sites.

2. Operator Comfort & Safety

The 303.5E CR is available with both enclosed ROPS/FOPS Level 2 certified cab and open canopy options. The enclosed cab adopts a pressurized, sealed design, with internal noise controlled at 74 dB(A), 3-5 dB lower than most competing models in the same class. It is fitted with a fully adjustable suspension seat, ergonomic armrests, a multi-function LCD monitor that displays real-time operating data (fuel level, water temperature, fault codes, working hours, etc.), and optional air conditioning/heating system for all-season comfort.

For safety, the machine is equipped with a standard hydraulic lockout lever, which disables all working and travel functions when lifted to avoid accidental operation. Other standard safety configurations include travel alarm, anti-slip foot pedals, and wide panoramic windows for 360° unobstructed visibility; a rearview camera is optional for further improving operation safety in complex sites.

3. Versatility & Attachment Compatibility

The 303.5E CR supports a wide range of Cat original and compatible attachments, with a standard auxiliary hydraulic circuit (dual circuit optional) to meet the needs of different operations. Users can quickly switch attachments within 10 seconds with the optional hydraulic quick coupler, common compatible attachments include:

General purpose / heavy duty digging buckets (capacity 0.07-0.18 m³)
Hydraulic breakers
Augers for hole drilling
Grapples for material handling
Tilt buckets for terrain grading
Power rakes, compactors, brooms, etc.This high versatility reduces equipment idle time and meets diversified operation demands.

4. Durability & Serviceability

Cat’s industry-leading structural design guarantees long service life of the 303.5E CR: the boom, stick and X-shaped chassis are made of high-strength thickened steel plate, with stress relief treatment after welding to resist deformation and impact under heavy load conditions. Users can choose between rubber tracks (suitable for urban road operation, no damage to pavement) and steel tracks (suitable for harsh construction sites) according to operation scenarios.

All daily maintenance points are centrally arranged on the left side of the machine, accessible by opening the side cover without climbing onto the machine. The 500-hour extended oil and filter change interval reduces maintenance frequency and downtime. The optional Cat Product Link™ system supports remote monitoring of equipment location, working hours, fuel consumption and fault warnings, helping fleet managers improve management efficiency and reduce operating costs.

5. Key Specifications

Parameter	Specification
Operating Weight	3,500 – 3,900 kg (depending on configuration)
Rated Net Power	24.2 kW (32.5 hp) @ 2,400 rpm
Emission Standard	Tier 4 Final / EU Stage V (Tier 3 optional)
Maximum Digging Depth	3,110 mm
Maximum Digging Reach (at ground level)	5,060 mm
Maximum Dump Height	3,370 mm
Tail Swing Radius	1,220 mm
Bucket Capacity	0.07 – 0.18 m³
Fuel Tank Capacity	55 L
Hydraulic Oil Capacity	40 L

6. Typical Applications

Urban municipal engineering: pipe trench digging, sidewalk maintenance, street greening construction
Landscaping: tree planting, terrain shaping, irrigation pipeline laying
Indoor demolition and renovation: ultra-short tail swing fits limited space inside buildings
Agricultural operations: farmland leveling, greenhouse construction, livestock waste handling
Rental market: high reliability and low maintenance cost make it one of the most popular mini excavators in the rental segment
Construction site auxiliary work: material transfer, foundation pit cleaning, small concrete breaking

Non flooded

No accident

Original product

Used Caterpillar 303.5E Excavator

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