What to Watch for When Buying a Used Mobile Crane?

Short answer: With a mobile crane, the safety chain is checked before bargaining: boom straightness and telescoping movement, rope/hook wear, the load moment indicator (LMI) functioning, and periodic inspection records. A crane with a disabled LMI or no inspection is expensive whatever its price.

This guide answers: How is boom damage spotted? · When should the rope be replaced? · Which inspection records are required? · How many tons of crane to choose?

What to check on boom and telescope?

Bending/weld marks on the boom are signs of a transport accident; telescoping in and out should be smooth — stiffness is a hydraulic or friction-plate issue.

When are rope and hook replaced?

Broken wires, crushing and rust on the rope; throat opening and the safety latch on the hook are checked. These are not cheap parts and they fail inspection.

Inspection and paperwork

Is the periodic inspection report (authorized inspection) up to date? Is the capacity chart legible in the cabin? The operator's license is the operating party's responsibility — our guide has the details.

Frequently asked questions

How many tons of crane to choose? Selected from the capacity chart based on the heaviest load + working radius; the "ton" label does not apply at maximum radius.

Hours or kilometers? Both: the chassis (road) and superstructure (crane) wear separately — ask for records of both.

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Last updated: 06.07.2026 · This guide is based on field practice and platform data; it does not replace a technical inspection.