Field guides · free, and genuinely useful
How to check a machine yourself
Everything here is taken from the protocol we use on a paid inspection. It is published in full because a buyer who knows what to look for is a better customer than one who does not — and because most of this trade's knowledge has never been written down anywhere.
Buying
Buying
How to inspect a used excavator before you buy it
What should I check before buying a used excavator?
A field method for checking a used excavator without instruments: documents first, cold start, undercarriage measured, welds, timed hydraulics and the drift test — in the order that saves you the most wasted time.
How to work out what a used machine is actually worth
How do you value a used excavator in India?
There is no Blue Book for used construction equipment in India. A method for valuing a machine anyway — comparable asking prices, the deferred-cost deduction, hours, documentation and the discount for doubt.
Twelve questions to ask before you drive out to see a machine
What should I ask a seller before going to see a used machine?
A phone screen for used construction equipment. Twelve questions that take four minutes, sort the machines worth visiting from the ones that are not, and tell you what kind of seller you are dealing with.
Condition
Condition
How to tell if a machine's hours have been wound back
How can you tell if an excavator's hour meter has been tampered with?
The wear points that betray a rolled-back hour meter on an excavator or backhoe loader — pedal rubber, seat bolster, joystick grips, step paint — and what to do when the wear and the reading disagree.
Hydraulic cycle times and the drift test
How do you test the hydraulics on a used excavator without a pressure gauge?
How to diagnose a used excavator's hydraulics with a stopwatch and a steel rule — timing every function against specification, reading the wear pattern, and measuring cylinder drift over five minutes.
Also free
The undercarriage wear calculator turns a grouser measurement into a percentage of life remaining — the single most useful number you can take yourself.
And if you would rather someone just looked at it: send six photographs and we will give you a grade band for nothing.