Buying a Used Digger or Excavator: What to Check

A good used digger can do everything a new one will for a fraction of the price — but only if it's been looked after. Whether you're after a mini digger for groundworks or a larger excavator for site work, here's a practical checklist to help you buy with confidence.

Match the machine to the job

Start with the work, not the machine. The size class — usually measured in operating weight — decides what you can dig, lift and get into:

• 1–2 tonne mini diggers — domestic groundworks, drainage, landscaping and access through gateways.
• 3–5 tonne — the all-rounder for farms, builders and contractors.
• 8 tonne and up — heavier site work, bulk muck-shifting and demolition.

Also think about transport: can your trailer and towing vehicle legally carry it? A machine that's too big to move easily costs you every time you use it.

Check the hours — but read between them

Engine hours are the digger's mileage, but context matters. A machine with high hours that's been serviced on schedule can be a far better buy than a low-hour machine that's been neglected. Ask for the service history and look for consistent, sensible use.

Inspect the undercarriage and tracks

On a tracked machine the undercarriage is the most expensive thing to put right, so check it carefully:

• Track tension and wear — rubber tracks should have plenty of tread and no chunks missing; steel tracks shouldn't be sloppy.
• Rollers, idlers and sprockets for play or leaks.
• Even wear side to side — uneven wear can hint at alignment or repair issues.

Test the hydraulics

Run the machine up to temperature and work every function — boom, dipper, bucket, slew and auxiliary lines. Movements should be smooth and strong, with no juddering, drifting or whining. Check rams and hoses for leaks, and make sure the machine holds a load without creeping down.

Engine, fluids and the cab

Look for a clean start, steady idle and no excessive smoke. Check oil and coolant for contamination, and have a look underneath for leaks. In the cab, test the controls, lights and any safety cut-offs.

Attachments and history

Buckets, breakers, augers and grabs add real value — confirm what's included and that hitches match. Finally, check the paperwork: serial numbers, any finance owing, and a clear description that matches the machine.

Buying with confidence

At North Norfolk Vehicle Solutions we hand-pick straightforward, mechanically sound machines and describe them honestly — and our own workshop is on hand if anything ever needs attention. Browse our diggers and excavators for sale or all our stock, ask about finance, and we'll arrange nationwide delivery. Get in touch for honest advice on the right machine for you.