What to Check Before Buying a Second Hand Excavator

Buying a second hand excavator can be a cost-effective solution for construction companies, contractors, and equipment rental businesses. A well-maintained used excavator can provide strong performance at a much lower price than a new machine.

However, choosing the wrong excavator may result in expensive repairs and reduced productivity. Before purchasing a used excavator, buyers should carefully inspect the machine and verify its overall condition.

In this guide, we will explain the most important things to check before buying a second hand excavator in 2026.

Why Inspection Is Important When Buying a Used Excavator

A used excavator may appear clean and attractive on the outside while hiding serious mechanical problems internally.

A proper inspection helps buyers:

  • Avoid costly repairs
  • Reduce operational risks
  • Understand the machine’s true condition
  • Improve long-term investment value
  • Choose reliable equipment for construction projects

Careful inspection is especially important when importing excavators from overseas suppliers.

1. Check the Overall Appearance

Start with a general visual inspection of the excavator.

Look carefully for:

  • Structural cracks
  • Rust damage
  • Welding repairs
  • Oil stains
  • Missing components

Fresh paint may sometimes hide previous repairs or damage, so inspect carefully around the boom, arm, and chassis.

Heavy structural damage may affect machine durability and safety.

2. Inspect the Hydraulic System

The hydraulic system is one of the most important and expensive parts of an excavator.

Carefully inspect:

  • Hydraulic pump
  • Hydraulic cylinders
  • Hydraulic hoses
  • Motor basculante
  • Travel motor

Common warning signs include:

  • Hydraulic oil leakage
  • Weak digging power
  • Slow arm movement
  • Unusual hydraulic noise
  • Machine vibration

Hydraulic repairs can be extremely expensive, so this step should never be ignored.

3. Examine the Engine Condition

The engine directly affects machine reliability and working efficiency.

Start the engine and check:

  • Cold start performance
  • Engine vibration
  • Oil leakage
  • Unusual engine noise
  • Exhaust smoke color

Different smoke colors may indicate different problems:

Smoke ColorPossible Issue
Black SmokeFuel system issue
Blue SmokeEngine oil burning
White SmokeCoolant leakage or engine damage

A stable engine with smooth operation is a positive sign.

4. Check the Working Hours

Working hours provide useful information about machine usage.

Recommended working hour ranges:

Excavator TypeRecommended Hours
Mini Excavator2,000–5,000 Hours
Medium Excavator4,000–8,000 Hours
Large Excavator6,000–12,000 Hours

However, working hours alone do not fully determine machine quality.

A well-maintained excavator with higher hours may still perform very well.

5. Inspect the Undercarriage

The undercarriage is one of the most expensive wear areas on an excavator.

Inspect:

  • Tracks
  • Rodillos
  • Rodillos
  • Piñones
  • Track tension

Heavy wear may indicate:

  • Intensive usage
  • Poor maintenance
  • Mining or quarry operation history

Replacing undercarriage components can significantly increase maintenance costs.

6. Test Machine Operation

Whenever possible, test the excavator during operation.

Check:

  • Boom movement
  • Arm movement
  • Bucket response
  • Swing rotation
  • Travel speed

The machine should move smoothly without delays or abnormal sounds.

Operational testing can reveal hidden hydraulic or engine issues.

7. Inspect the Bucket and Boom

The bucket, boom, and arm experience continuous heavy pressure during operation.

Look for:

  • Cracks
  • Welding marks
  • Bent structures
  • Excessive wear

Structural damage may reduce digging performance and long-term durability.

8. Check for Oil and Fluid Leaks

Inspect carefully for:

  • Hydraulic oil leaks
  • Engine oil leaks
  • Fugas de refrigerante

Fluid leakage may indicate:

  • Worn seals
  • Damaged hoses
  • Poor maintenance

Serious leakage problems should be repaired before purchase.

9. Verify Maintenance History

Maintenance records can help buyers understand how well the machine was maintained.

Request:

  • Oil change records
  • Engine service history
  • Hydraulic maintenance records
  • Repair records

Regular maintenance usually indicates better machine condition and reliability.

10. Choose a Reliable Supplier

Choosing a trustworthy supplier is essential when buying a second hand excavator.

A professional supplier should provide:

  • Real machine photos
  • Inspection videos
  • Export experience
  • Loading photos
  • Clear communication

Avoid suppliers that only use internet photos or cannot provide detailed machine information.

Common Mistakes Buyers Should Avoid

Choosing Only Based on Price

Extremely cheap machines often require expensive repairs later.

Ignoring Hydraulic Inspection

Hydraulic system repairs can be very costly.

Not Testing the Machine

Always test machine movement whenever possible.

Buying From Unverified Suppliers

Reliable suppliers reduce purchasing risks and improve transaction safety.

Best Excavator Brands to Consider

Popular used excavator brands include:

  • CAT
  • Komatsu
  • Hitachi
  • SANY
  • Volvo
  • Hyundai
  • Kobelco

These brands are known for strong performance, durability, and stable resale value.

Final Thoughts

Before buying a second hand excavator, buyers should carefully inspect the machine condition, hydraulic system, engine performance, undercarriage wear, and supplier reliability.

A professionally inspected excavator can provide excellent performance while reducing long-term maintenance costs.

If you are looking for reliable used excavators from China, Shanghai Shenhu Machinery provides professionally inspected machines ready for global export.