A well-bought used machine is one of the best capital decisions there is: same work, a fraction of the price. Bought badly, it's a bottomless pit of repairs. The difference is checking the right things before you pay. Here's the checklist.
1. Real hours and service history
The hour meter is the machine's odometer, but how those hours were used matters more. Ask for the maintenance history and, if the equipment has it, the telematics report (like KOMTRAX on Komatsu): it shows real hours, alerts and usage patterns. A unit with many hours but up-to-date maintenance is often better than one with few hours and neglected service.
2. Engine and hydraulics: leaks and smoke
Start it cold and watch the exhaust smoke: blue is burnt oil, persistent white can be coolant. Look for oil and hydraulic leaks at hoses, cylinders and seals. An oil analysis (metals in parts per million) reveals internal wear you can't see — worth every cent on a large purchase.
3. Undercarriage and wear: the costliest to replace
On an excavator or dozer, the undercarriage (tracks, rollers, idlers) can be 20% of the machine's value; check its wear carefully. On loaders and skid-steers, look at tires and, on all of them, the GET — teeth, cutting edges and shrouds. They're consumables, but replacing them all at once adds up fast. Discount that cost from the price.
4. Structure, frame and repairs
Inspect the frame, arm and boom for cracks, recent welds or mismatched paint: they can reveal a repair from a hard hit. A compromised structure is hard and expensive to fix properly. The cab, controls and safety systems (ROPS/FOPS) also count for daily operation.
5. Provenance and backing: who you buy from
A used unit from a dealer with backing — certified inspection, parts availability, workshop and some warranty — is worth more than the same model from a private seller with no history. Confirm parts exist for that model in the region and that someone services it. The lowest price stops being lowest the day it breaks down and there's no part.
Frequently asked questions
How many hours are too many?
It depends on type and maintenance more than the number. A well-maintained excavator with 8,000–10,000 hours can run for years; a neglected one with 3,000 can be a problem. Service history says more than the hour meter.
Is an oil analysis worth it?
On a large purchase, always. It costs little and detects internal wear (metals in the oil) you can't see from outside. It's the X-ray of the engine and hydraulics before you pay.
Does used equipment come with a warranty?
Bought from a dealer with backing, yes: our Constru Usados equipment is inspected and certified, with a limited warranty and parts availability. From a private seller, usually not — which is why provenance matters so much.
Can used machinery be financed?
Yes. Certified used equipment can be financed with plans similar to a new unit's, subject to credit evaluation and the asset. Ask us about terms for your country.
Ready for the next step?
See Constru Usados