Purchasing a used CAT excavator can be a smart investment — if you know what to look for. Renowned for their reliability and power, CAT excavators hold their value well, making them a popular choice for contractors looking to expand their fleet without paying the price of a new machine. However, buying used heavy equipment requires careful inspection to avoid costly surprises.
Here are 5 critical tips to help you inspect a used CAT excavator before you buy.
1. Check the Hour Meter and Machine History
One of the first things to examine is the hour meter. Excavators with high operating hours may require more frequent maintenance and could be nearing the end of their service life. As a general guideline:
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Under 5,000 hours: low use
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5,000–10,000 hours: moderate use
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Over 10,000 hours: high use
Request a maintenance log or service history if available. Well-maintained machines with higher hours can often be more reliable than those with lower hours but poor upkeep.
2. Inspect the Hydraulic System Thoroughly
The hydraulic system is the heart of an excavator. Check for:
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Leaks around cylinders and hoses
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Proper fluid levels and cleanliness
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Smooth and responsive movements during operation
A poorly maintained hydraulic system can lead to major repairs and performance issues down the line. Ask if seals and pumps have been replaced or repaired recently.
3. Evaluate the Undercarriage and Tracks
The undercarriage is one of the most expensive parts of the excavator to repair or replace. Look for:
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Uneven or excessive wear on the tracks
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Loose or damaged rollers, idlers, and sprockets
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Signs of rust or cracks
Run the machine forward and backward to ensure smooth track movement and stability.
4. Examine the Boom, Stick, and Bucket
Inspect the boom, stick, and bucket for:
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Cracks or weld repairs
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Loose pins and bushings
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Excessive play or slack
Worn pivot points can affect precision and efficiency. Shake the boom slightly to see how much movement there is at the joints — too much play can indicate significant wear.
5. Check the Engine Performance and Exhaust
Start the machine and listen closely to the engine. Warning signs include:
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Rough starts
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Unusual noises
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Excessive smoke from the exhaust
Inspect filters, belts, and coolant hoses. A clean engine bay can be a good sign that the machine has been well-maintained, though be cautious if it looks like it's been recently power-washed — it could be hiding leaks.
Bonus Tip: Verify the Serial Number and Ownership
Always confirm the serial number (VIN) with the seller and cross-check it with CAT's equipment database or your local dealer. Ensure there are no outstanding loans or liens on the machine.
Final Thoughts
Buying a used CAT excavator can save you a significant amount of money — but only if you take the time to perform a detailed inspection. Use these five tips to make an informed purchase and avoid expensive mistakes. If you're not confident in your assessment, consider hiring a professional equipment inspector or asking a trusted mechanic to join you.
A well-chosen used CAT excavator can offer years of dependable service — just make sure it’s the right machine for your job from the start.
Looking for reliable used CAT excavators? Work with trusted suppliers and manufacturers offering transparent history, professional inspections, and fair pricing. A solid machine at a competitive price starts with the right questions.
