System for maintenance of crusher jaw of a compact eccentric crusher

A compact eccentric roll crusher for crushing a supply of mineral material, the crusher comprising:

• a crusher frame that at least partially defines a crushing chamber;
• a crushing roller mounted to a drive shaft for movement in the crushing chamber;
• a crusher jaw having a first end and a second end and movable between a crushing position and a maintenance position, wherein when the crusher jaw is in the crushing position, the first end is pivotably mounted to the crusher frame such that the second end is movable into and out of the crushing chamber to adjust a crushing gap between the crusher jaw and crushing roller and wherein when the crusher jaw is in the maintenance position, the second end is pivotably mounted to the crusher frame such that the first end is movable toward and away from the crusher frame;
• and
• a pair of upper bearing assemblies each mounted to the crusher frame, wherein the pair of upper bearing assemblies support the first end of the crusher jaw in the crushing position and move with the first end of the crusher jaw when the crusher jaw moves into the maintenance position.

A method of providing maintenance on a crusher jaw of a crusher having a crusher frame and a crushing roller that defines a crushing gap between the crusher jaw and the crushing roller, the method comprising the steps of:

• providing upper bearing assemblies to pivotably mount a first end of the crusher jaw to the crusher frame such that the second end of the crusher jaw is movable to adjust the crushing gap;
• securing the second end of the crusher jaw to the crusher frame;
• releasing the upper bearing assemblies from attachment to the crusher frame;
• and
• moving the first end of the crusher jaw away from the crusher frame into a maintenance position.