The present inventive dust seal assembly substantially improves the prevention of dust entry into a flat head cone crusher or a steep head cone crusher and substantially improves its ease of use and durability. The present inventive dust seal assembly includes non-fixed or floating labyrinth seals, does not require lubrication, and is effective for use with flat head cone crushers and steep head cone crushers using roller bearings. The dust seal assembly may comprise multiple non-fixed or floating horizontal labyrinth seals and labyrinth seal retainers, an attachment assembly to secure the multiple horizontal labyrinth seals and labyrinth seal retainers to either a cone head or an inner bonnet, a cone crusher inner bonnet adapted to interface with the multiple labyrinth seals and labyrinth seal retainers and, optionally, injection of pressurized air within the dust seal assembly itself.
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