Patent ID: 8832921

Claim:
A method of securing a mantle to a head assembly of a cone crusher, comprising: providing a locking nut assembly having an inner nut having a plurality of axial bores and an outer nut that is movable relative to the inner nut; attaching the inner nut of the locking nut assembly to the head assembly of the crusher; inserting a plurality of jackscrews into the axial bores of the inner nut; moving the plurality of jackscrews relative to the inner nut such that the jackscrews exert a first three on the mantle to create a locking force between the locking nut assembly and the head assembly; moving the outer nut along the inner nut until the outer nut exerts a second force on the mantle; and moving the plurality of jackscrews away from the mantle to eliminate the first force exerted by the plurality of jackscrews on the mantle such that only the outer nut exerts the locking force.