How to Inspect a Used Excavator: A Complete Buyer's Guide

Purchasing a used excavator can save your company up to 60% compared to buying new, but only if you avoid a 'lemon'. As a heavy machinery inspector with 15 years of experience, here is my definitive 4-step inspection checklist: 1. Test the Hydraulics: Start the engine, run it at full throttle, and perform full cylinder extensions. Listen for unusual whining noises from the main pump and check for jerky movements. 2. Inspect the Engine: Look for oil leaks around the head gasket and inspect the exhaust smoke. Blue smoke indicates burning oil, black smoke indicates fuel system issues, and white smoke means coolant is leaking into the combustion chamber. 3. Evaluate the Undercarriage: Undercarriage replacement can cost thousands. Measure the wear on the track links, rollers, and sprockets. Check if the track tension is properly adjusted. 4. Check for Play and Cracks: Inspect the boom and arm welds for stress cracks. Wiggle the bucket to check the pin and bushing play. Excessive play means they need immediate replacement.