Changing the jaws of a primary crusher

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The primary crusher used to produce aggregate in the Meilleraie (Vendée) quarry, operated by Eurovia, is equipped with two superimposed jaws, very heavy parts subject to wear that have to be changed at least five times a year. These operations require maintenance personnel to work at a depth of around five metres in the crushing chamber (the space between the jaws). The operation is generally carried out on a ladder – and thus with a harness – and is both arduous (lack of space) and risky (crushing, fall from height).

These two platforms were produced in February 2012. Since that date, they have been systematically used for the five jaw-replacement operations.

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