Used Excavator SANY SY55U Gallery, Images, Pictures

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Used Excavator SANY SY55U Main Parts Pictures

The SANY SY55U is a compact mini hydraulic excavator designed for small to medium-scale excavation and construction tasks. It offers high versatility, power, and efficiency, making it ideal for urban projects, tight spaces, and light construction work. Below are the main parts of the SANY SY55U Excavator:

1. Engine

• Engine Type: The SY55U is powered by a Yanmar 4TNV88C 4-cylinder, water-cooled, turbocharged diesel engine.
• Rated Power: Approximately 36.2 kW (48.5 hp) at 2,240 rpm.
• Turbocharged: The turbocharger boosts engine performance by enhancing efficiency and providing higher power output, ideal for demanding tasks.
• Cooling System: The engine comes with a radiator and oil cooler system to maintain optimal operating temperatures, preventing overheating.
• Fuel System: The common rail fuel injection system allows for precise fuel delivery, improving fuel efficiency, reducing emissions, and optimizing combustion.
• Fuel Tank: Equipped with a large fuel tank for extended operation time between refueling stops, ensuring the excavator can work longer hours without interruption.

2. Hydraulic System

• Main Hydraulic Pump: The SY55U features a high-performance, variable displacement piston pump that provides efficient power delivery for the hydraulic system.
• Hydraulic Cylinders: The hydraulic cylinders control the movement of the boom, arm (stick), and bucket. These cylinders provide powerful and smooth operation, making the excavator highly effective for digging, lifting, and material handling.
• Hydraulic Control Valve: The hydraulic control valve directs hydraulic fluid to various parts of the machine, ensuring coordinated and smooth movement of components.
• Pilot Control System: The excavator uses a pilot-operated hydraulic system to reduce control effort and offer precise and responsive control of the machine’s functions.
• Hydraulic Oil Cooler: A hydraulic oil cooler maintains the correct temperature for the hydraulic fluid, ensuring the system runs at peak efficiency.

3. Undercarriage

• Track Frame: The track frame is robust, providing the stability and support needed for working on uneven ground. The undercarriage components are designed to handle tough conditions while maintaining the machine’s balance.
• Tracks: The SY55U uses steel tracks that offer durability and excellent traction, especially on soft or muddy ground.
• Track Rollers: Track rollers distribute the weight of the excavator evenly across the tracks, helping to reduce wear and ensuring smooth operation.
• Idlers: Positioned at the front of the track assembly, idlers help maintain proper track tension and direct the tracks along the undercarriage.
• Sprockets: Sprockets provide the necessary engagement to move the tracks and allow the machine to travel forward and reverse.
• Track Shoes: Track shoes are the large pads that provide the traction needed to move the machine over various surfaces, preventing slipping or sinking.

4. Upper Structure

• Cab: The operator's cab of the SY55U is designed for comfort and visibility, providing an ergonomic workspace with adjustable seating, air conditioning, and easy access to controls. It’s built to minimize operator fatigue and improve overall efficiency.
• Swing Bearing: The swing bearing allows for 360-degree rotation of the upper structure, enabling the operator to perform tasks such as digging, lifting, and material handling without having to reposition the entire machine.
• Counterweight: The counterweight helps to balance the excavator during heavy lifting and digging operations, improving stability and performance.
• Engine Hood: The engine hood protects critical components like the engine, radiators, and hydraulic parts from dirt and debris, while allowing for easy access to maintenance points.

5. Boom, Arm (Stick), and Bucket

• Boom: The boom provides vertical reach and is designed for strength, enabling the excavator to perform lifting and digging tasks efficiently.
• Arm (Stick): The arm connects the boom to the bucket and provides additional reach for deep digging or material handling.
• Bucket: The bucket is the primary tool for excavation, material handling, and digging tasks. It can be replaced with various attachment types (e.g., trenching or heavy-duty buckets) depending on the work requirements.
• Quick Coupler: The quick coupler system allows the operator to easily switch between different attachments without manual tools, improving the machine’s versatility and reducing downtime.

6. Attachment System

• The SANY SY55U can be fitted with various attachments for different applications, including:
  • Buckets (general-purpose, trenching, and heavy-duty)
  • Hydraulic Hammers
  • Grapples
  • Augers
• The quick coupler system allows for easy attachment swaps, improving flexibility and reducing downtime on the job site.

7. Cooling System

• Radiator: The radiator is used to cool the engine coolant, maintaining optimal engine performance during operation.
• Oil Cooler: The oil cooler ensures that the hydraulic oil stays at the correct temperature, preventing overheating and preserving hydraulic performance.
• Coolant Reservoir: The coolant reservoir ensures the engine has sufficient coolant, preventing the engine from overheating during extended periods of operation.

8. Electrical System

• Alternator: The alternator generates electrical power to charge the battery and operate electrical components such as lights, sensors, and monitoring systems.
• Battery: The battery stores electrical energy required for starting the engine and powering the electrical components.
• Fuse Box and Wiring Harness: These components are responsible for safely distributing electrical power to various systems, including lights, sensors, and hydraulic controls.
• Machine Monitoring System: The SY55U is equipped with a machine monitoring system that provides real-time diagnostics, allowing operators and fleet managers to monitor critical parameters such as fuel consumption, engine load, and hydraulic pressure.