Used Sany SY50U Pro Excavator for Sale

Technical Specifications & Performance Matrix

Understanding the mechanical heart of this platform is essential for evaluating its field readiness in projects. Operating Weight: 5,300 kg. Engine: Yanmar 4TNV88-PSY (Tier 4 Final). Rated Power: 29.1 kW (39 HP) @ 2400 rpm. Maximum Digging Depth: 3,420 mm. Maximum Reach at Ground: 5,880 mm. Hydraulic Pump Flow: 2 x 45.8 + 37 L/min. This technical configuration provides the high stability and torque required for deep excavation while maintaining a fuel-efficient profile for diverse urban sites. Understanding the mechanical heart of this 5,300 kg platform is essential for evaluating its field readiness in projects. Below is the detailed performance breakdown for the available unit: Operating Weight: 5,300 kg (5.3 Tons) - High stability-to-weight ratio for urban work. Engine Model: Yanmar 4TNV88-PSY - Tier 4 Final compliant, global fuel compatibility. Rated Power: 29.1 kW (39 HP) @ 2400 rpm - Optimized torque for deep excavation. Bucket Capacity: 0.18 m³ (Standard) - Perfect for precise utility trenching. Max Digging Depth: 3,420 mm - Excellent reach for residential foundation work. Hydraulic Pump Flow: 2 x 45.8 + 37 L/min - Fluid multifunction capability and precision. Swing Speed: 10.0 rpm - Rapid cycle times in tight workspaces.

Engineering for Urban Agility: The Zero Tail Swing Advantage

The primary architectural advantage of the 5-ton series is its 'U' (Ultra-compact) designation. Unlike conventional excavators where the counterweight protrudes significantly beyond the tracks, the Zero Tail Swing design allows the operator to focus entirely on the bucket and boom movement rather than worrying about the rear of the machine striking an obstacle. This is particularly valuable in municipal utility repairs, such as water pipe replacements or fiber optic installations under city streets, where space is restricted to a single lane of traffic. By utilizing this specialized excavator, contractors can significantly reduce their site insurance liability and minimize the costs associated with accidental structural damage. The 5.3-ton operating weight provides enough ballast to maintain stability even at full reach, while the compact footprint ensures it can be transported on a standard medium-duty trailer, reducing mobilization costs.

Yanmar 4TNV88 Powertrain: Reliability and Fuel Economy

Renowned globally for high thermal efficiency, this engine is perfectly matched to Sany's proprietary electronic control system. The engine delivers 29.1 kW of power, which is distributed with millisecond precision through the high-flow axial piston pumps. This power-matching technology ensures that every drop of fuel is converted into digging force, rather than heat. For global buyers concerned with operational costs, the integrated Eco-mode may reduce fuel consumption during light grading or trenching; verify the result on the exact unit. Beyond exhaust emissions, the machine is designed to operate at low noise decibel levels, which is crucial for residential landscaping projects or night-time utility work. Our technical team at the Shanghai yard verifies that the ECM logs show consistent performance history, confirming the unit is ready for immediate deployment upon arrival at your destination port.

Advanced Hydraulics and Precision Control

The hydraulic system of this platform is designed for fluid, simultaneous movements during complex grading. Many compact diggers in the 5-ton class suffer from jerky responses when attempting to swing and lift simultaneously. However, the Pro generation utilizes a load-sensing hydraulic management system that prioritizes flow based on operator input and real-time load resistance. This results in a precision grading capability that rivals much larger machines. Whether you are performing fine-grading for a sidewalk or digging a deep foundation for a residential garage, the high-sensitivity pilot joysticks provide the tactile feedback required for professional-grade finishes. This level of control not only improves work quality but also reduces operator fatigue over long shifts.

Durability and Reinforced Structural Integrity

While the machine is compact, its construction is 'heavy-duty' with high-tensile steel reinforcements. The boom and arm are built with high-tensile strength steel and feature internal baffle plates to withstand the stresses of high-impact digging and demolition work. The X-frame undercarriage is designed to shed mud and debris effectively, preventing buildup that can lead to premature track wear. For units exported from our Shanghai yard, we verify that all original factory welds are intact and that there is zero structural fatigue. The reinforced rubber tracks provide low ground pressure, allowing the machine to work on finished surfaces like asphalt or concrete without causing surface degradation. We also inspect the swivel joint and slew bearing for zero play, ensuring that the machine maintains its pinpoint accuracy throughout its service life.

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