Used Sany SY155C Medium-Duty Construction Excavator – Reliable and Efficient Earthmoving Solution

1. Introduction

The Used Sany SY155C Medium-Duty Construction Excavator is a versatile hydraulic machine designed for medium-scale construction projects, municipal works, and general earthmoving tasks. With a durable chassis, fuel-efficient engine, and advanced hydraulic system, this pre-owned excavator offers smooth operation, precise digging, and reliable performance.

Ideal for road construction, foundation work, landscaping, and urban development, the Sany SY155C combines operational efficiency, medium-duty power, and long-term durability, making it an excellent choice for contractors seeking cost-effective and dependable used machinery.

2. Performance Testing

Before deploying a used excavator like the Sany SY155C, comprehensive performance testing is crucial to ensure reliability and safety.

2.1 Engine Performance

• Conduct a full engine run-up to check idle stability, acceleration, and load response.

• Monitor fuel consumption to confirm energy efficiency.

• Listen for unusual noises, vibrations, or exhaust smoke that may indicate engine issues.

2.2 Hydraulic System Check

• Test the boom, arm, and bucket movements under various loads.

• Verify hydraulic pressure and flow rates meet manufacturer specifications.

• Inspect hoses, fittings, and cylinders for leaks or wear.

2.3 Undercarriage and Tracks

• Assess track tension, roller function, and track alignment.

• Check for wear on sprockets, idlers, and rollers.

• Ensure smooth and stable travel over uneven terrain.

2.4 Control and Safety Systems

• Test joysticks, pedals, and switches for responsiveness.

• Verify alarms, lights, and emergency stop systems are functional.

• Ensure the operator cabin offers full visibility and ergonomic comfort.

3. Usage Guidelines

Proper usage of the Sany SY155C Excavator ensures optimal performance, operator safety, and extended machine life.

3.1 Pre-Operation Checks

1. Inspect engine oil, hydraulic fluid, coolant, and fuel levels.

2. Examine undercarriage, boom, arm, and bucket for visible damage or wear.

3. Test all control systems, lights, and alarms for proper operation.

4. Ensure operator cabin is clean and seat/controls are properly adjusted.

3.2 Operating Procedures

• Start the engine with all controls in neutral, allowing a 3–5 minute warm-up.

• Operate the boom, arm, and bucket at low speed initially to confirm responsiveness.

• Avoid overloading the bucket or exceeding manufacturer-recommended digging limits.

• Maintain clear communication on-site and observe all safety protocols.

3.3 Post-Operation Routine

• Clean debris from tracks, rollers, and pivot points.

• Inspect hydraulic hoses, connections, and moving parts for wear.

• Record unusual noises, vibrations, or operational issues for maintenance reference.

4. Maintenance and Servicing

Regular maintenance is essential for reliable operation and longevity, especially for a pre-owned medium-duty excavator.

4.1 Daily Maintenance

• Check engine oil, hydraulic fluid, coolant, and fuel levels.

• Inspect tracks, rollers, and undercarriage for debris or damage.

• Verify all control systems, lights, and alarms are operational.

4.2 Weekly Maintenance

• Grease all pins, bushings, and pivot points.

• Inspect hydraulic hoses and fittings for leaks or wear.

• Check track tension and roller alignment.

4.3 Monthly Maintenance

• Test engine and hydraulic system performance.

• Replace filters and perform minor adjustments as required.

• Inspect structural components for cracks, corrosion, or excessive wear.

4.4 Annual Maintenance

• Conduct a comprehensive system inspection, including engine, hydraulics, and undercarriage.

• Replace any worn or damaged components to maintain operational efficiency.

• Update software or control systems if applicable.

5. Installation and Assembly

Proper installation and setup are critical for safe and effective operation of the Sany SY155C.

5.1 Delivery and Unloading

• Ensure the delivery platform is level and stable.

• Use heavy-duty cranes or ramps to unload the excavator safely.

• Verify the machine has no transit damage.

5.2 Track and Undercarriage Setup

• Inspect tracks, rollers, and idlers for proper tension and alignment.

• Grease pins, bushings, and pivot points before first operation.

• Confirm undercarriage is stable on the site terrain.

5.3 Hydraulic and Engine Checks

• Fill engine oil, hydraulic fluid, coolant, and fuel to recommended levels.

• Inspect hydraulic hoses, cylinders, and connections for leaks or damage.

• Start the engine and check all control functions.

5.4 Operator Cabin Setup

• Adjust seat and controls for operator comfort.

• Test joystick response, pedals, and alarms.

• Verify all safety systems and visibility before operation.

6. Conclusion

The Used Sany SY155C Medium-Duty Construction Excavator is a reliable, efficient, and cost-effective solution for medium-scale construction and earthmoving projects. Its durable undercarriage, advanced hydraulic system, and fuel-efficient engine provide smooth operation, precise digging, and long-term performance.

By following performance testing, proper usage, regular maintenance, and installation guidelines, contractors can maximize productivity, reduce operating costs, and extend the lifespan of this pre-owned excavator, making it a valuable asset for any construction or municipal project.