Sany Excavator Problems : 5 Common Issues (Explained)

Sany excavators are known for their durability and efficiency in the construction industry, but they are also prone to problems like most machjnes. In this article we will discuss some of the common Sany excavator problems, their causes, and ways of solving or addressing them practically.

Table of Contents

What Is A Sany Excavator?

Sany excavators are equipped with powerful engines that ensure efficient, reliable and durable operation. They feature intelligent control systems that provide excellent precision, making them perfect for a variety of digging tasks. Sany excavators have high digging capacities that make them to complete more work in less time. They also have strong hydraulic systems that give them more power and precision making sure they are accurate and smooth in all operations.

Sany Excavator Problems

1. Hydraulic System Problems

Hydraulic system problems are common in Sany excavators. When the hydraulic system fails, the excavator may not be able to move or perform its functions. These problems can be caused by contaminated;

  • Hydraulic fluid
  • Damaged hydraulic hoses
  • Faulty hydraulic pumps
  • Faulty relief valve

Troubleshooting Hydraulic System Problems

  • Start by checking the hydraulic oil levels and condition. Low or contaminated hydraulic oil can result in hydraulic system problems. And make sure that the hydraulic oil is at the recommended level and is clean, free of water, and debris.
  • Check for any hydraulic lines, hoses, and connections that may be leaking hydraulic fluid. The leaking component will need to be repaired or replaced to prevent further damage.
  • Check the hydraulic filter and replace if it is dirty or clogged.
  • Check the hydraulic pump for any signs of failure, such as unusual sounds, leaks or overheating and replace it if necessary.
  • A defective relief valve will lead to high hydraulic pressure which can be responsible for equipment damage. Check the relief valve for any damage or wear, which needs either repairs or replacements.

2. Electrical Problems

These problems can cause the machine to shut down or fail to start. Electrical problems can occur in Sany excavators due to;

  • Damaged wires
  • Faulty sensors
  • Failed alternators.

Troubleshooting Electrical Problems

  • Start by checking the battery condition and connections. Ensure the battery terminals are free of corrosion, tight, and not damaged. Ensure the battery has enough charge and that the alternator is functioning properly.
  • Sany excavators have a fuse box inside the cab that contains fuses to protect the electrical system. Check the fuses to see if any have blow and replace them if necessary.
  • Check that all of the wiring connections are secure and not damaged. Make sure there are no loose, disconnected or frayed wires that could cause electrical problems.
  • Inspect the electrical components such as the starter motor, solenoid, relays, and switches. Check the components for any damage, wear and tear or signs of overheating. If any component is damaged, it will need to be repaired or replaced.
  • Check the excavator’s controller, which is the main electrical control unit for the Sany excavator.

3. Engine Problems

Engine problems are common in Sany excavators due to poor maintenance or contaminated fuel. These problems can cause the excavator to;

  • Overheat
  • Produce excessive smoke
  • Failure to start
  • Misfire
  • Backfire, etcetera

Troubleshooting Engine Problems

  • Start by checking the fuel system for any issues such as contaminated or low fuel levels, clogged fuel filters, or damaged fuel lines. And make sure the fuel system components are clean and replace any damaged or worn components.
  • Check the air filter for damage or clogging, as clogged air filters will reduce engine power output. Clean or replace the air filter as necessary.
  • The cooling system is responsible for regulating the engine temperatures. Check for leaks, check the coolant level, and check the condition of the radiator, hoses and water pump. Replace any worn or damaged components.
  • Also make sure the battery terminals are free of corrosion and connections are tight. A defective battery can cause issues with the ignition system and prevent the engine from starting or cause a complete loss of power.
  • Inspect the engine and its components, such as the spark plugs, wires, and coils. Replace any components that are damaged or worn.

4. Undercarriage Problems

These problems can cause the machine to move slowly, lose stability, or fail to move at all. Undercarriage problems can occur due to;

  • Worn-out tracks
  • Damaged rollers
  • Faulty idlers

Troubleshooting Undercarriage Problems

  • Make sure that the tension of the track is set to the Sany excavator’s specifications and adjust if necessary. Replace damaged or excessively worn parts as appropriate.
  • Check the rollers for damage, wear and tear, and make sure they are moving freely. Make sure the roller bearings are correctly lubricated and if there is any issue with the bearings replace them.
  • Check the idlers and sprockets for damage or wear, and ensure they are moving freely. If any component is damaged or worn out thrn you need to replace it.
  • The Sany excavator’s final drive is responsible for powering the tracks. Check for leaks, damage, and wear, and check the oil level. If the final drive is worn out or damaged, it will need to be repaired or replaced.
  • Also check the alignment of the tracks, as they could cause undercarriage problems if misaligned. Ensure both tracks are aligned and parallel to each other.
  • Finally check the undercarriage for external damage in the form of dents or signs of impact. Make sure the undercarriage is not bent or twisted, so any damage can cause significant undercarriage issues.

5. Control System Malfunctions

The Sany excavator’s control systems like the joystick and pedal controls can fail due to;

  • Wear and tear, or
  • Electrical issues

Troubleshooting Control System Malfunctions

Before you begin troubleshooting you need to known exactly where the problem is coming from.

  • Check the battery and electrical connections to ensure they are functioning properly.
  • Then inspect the hydraulic lines, cylinders, and valves for damage or leaks.
  • The control system on the Sany excavator relies on sensors and switches to detect changes in the environment and respond accordingly. Check these components to ensure they are functioning properly.

How To Prevent Problems With Your Sany Excavator

  • Change the hydraulic fluid and filters regularly.
  • Inspect the engine for oil leaks and worn-out parts.
  • Checking the undercarriage for worn-out tracks, damaged rollers, or faulty idlers.
  • Proper operation of the Sany excavator can also help prevent problems such as hydraulic system failure and undercarriage problems. This means not overloading the machine and operating it on level ground and also avoiding harsh impacts.

How Often Should I Change The Hydraulic Fluid In My Sany Excavator?

The hydraulic fluid in a Sany excavator should be changed every 1000 hours of operation or as recommended by the manufacturer.

How Can I Prevent Undercarriage Problems In My Sany Excavator?

Undercarriage problems can be prevented by inspecting the tracks, rollers, and idlers regularly and replacing worn-out components as needed.


In conclusion Sany excavators are prone to problems like any other machinery. However withproper maintenance, operation, and timely repairs you can prevent the problems and ensure longevity and durability to your Sany excavator. It is important to seek professional repair services and use genuine Sany parts and accessories to prevent future problems. By following these tips and tricks, you can maintain your Sany excavator and increase its lifespan.