When buying a used CAT excavator, prioritize these steps:

• Service History: Request maintenance records to verify regular servicing. Lack of documentation may indicate neglect.
• Structural Integrity: Inspect the boom, arm, and undercarriage for cracks, rust, or weld repairs. Misaligned tracks or excessive wear suggest heavy use.
• Hydraulic System: Check for leaks, slow movements, or unusual noises during operation. Replacing hydraulic pumps can be costly.
• Engine Hours: Compare hours to the model's typical lifespan. Cat excavators often last 10,000+ hours with proper care.
• Seller Reputation: Buy from dealers with verified reviews or OEM-certified resellers. Avoid auctions with no inspection access.