7 Common Problems with Used Doosan Excavators and How to Avoid Them

Buying a used Doosan excavator can be a smart way to reduce upfront costs while maintaining strong performance on the job site. However, like any heavy equipment, used machines come with potential risks—especially if you don’t know what to look for.

In this guide, we’ll break down the 7 most common problems with used Doosan excavators and show you how to avoid them, helping you make a safer and more profitable investment.

1. Engine Wear and Performance Issues

The Problem:

Over time, engines can develop:

• Excessive smoke (black, blue, or white)
• Loss of power
• Oil leakage or high oil consumption

These issues often result from poor maintenance or long working hours.

How to Avoid:

• Check cold start performance
• Listen for unusual engine noise
• Inspect exhaust color
• Review maintenance history if available

2. Hydraulic System Failures

The Problem:

The hydraulic system is critical for excavator performance. Common issues include:

• Slow or weak operation
• Oil leaks
• Pressure loss

Repairs can be expensive and time-consuming.

How to Avoid:

• Test all hydraulic functions (boom, arm, bucket, swing)
• Check for leaks and worn hoses
• Ensure smooth and responsive movement

3. Undercarriage Wear

The Problem:

Undercarriage components such as tracks, rollers, and sprockets wear out over time.

This is one of the most expensive parts to replace.

How to Avoid:

• Inspect track tension and alignment
• Check for uneven wear
• Evaluate remaining service life

4. Structural Damage or Welding Repairs

The Problem:

Cracks or previous welding on the frame, boom, or arm may indicate:

• Past accidents
• Overloading
• Structural fatigue

How to Avoid:

• Inspect weld areas carefully
• Look for cracks, rust, or deformation
• Avoid machines with major structural repairs

5. Electrical System Malfunctions

The Problem:

Electrical issues can affect:

• Control systems
• Sensors and displays
• Starting and operation

These problems are often hidden and difficult to diagnose.

How to Avoid:

• Test all electrical functions
• Check dashboard warnings
• Inspect wiring for damage or modifications

6. Inaccurate Working Hours

The Problem:

The hour meter may not always reflect actual usage due to:

• Reset or replacement
• Faulty readings

This can mislead buyers about machine condition.

How to Avoid:

• Compare wear level with reported hours
• Check pedals, controls, and cabin condition
• Request service records if available

7. Lack of Proper Maintenance History

The Problem:

Machines without maintenance records may have:

• Irregular servicing
• Poor lubrication practices
• Hidden internal damage

How to Avoid:

• Ask for maintenance logs
• Check oil condition and filters
• Prefer machines from reliable suppliers

Bonus Tip: Don’t Focus Only on Price

Many buyers make the mistake of choosing the cheapest machine.

The real cost includes:

• Repairs and maintenance
• Downtime
• Parts replacement

Always evaluate the total cost of ownership, not just the purchase price.

How to Choose a Reliable Used Doosan Excavator

To reduce risk and ensure performance:

• Conduct a full inspection or request a third-party inspection
• Test the machine under working conditions
• Verify documents and machine history
• Work with a trusted and experienced supplier

Conclusion

A second-hand Doosan excavator can deliver excellent value—but only if you avoid common pitfalls. By understanding these 7 key problems and taking the right precautions, you can significantly reduce risks and make a smarter investment.

At HuaChunQiang Machinery, we provide fully inspected machines, transparent condition reports, and global shipping solutions.