An adjustment and suspension system for supporting the mainshaft (38) of a gyratory crusher (10) within a stationary spider hub (42). The system includes a piston (76) movable within the spider hub to adjust the vertical position of the mainshaft. A stop member (120) positioned within the spider hub controls the maximum vertical movement of the piston within the spider hub. A drive assembly (130) is used to adjust the vertical position of the stop member to limit the vertical position of the mainshaft. The mainshaft is supported by a vertical support bearing (101) and a radial support bearing (110) that are located separate from each other. The vertical position of the drive shaft is controlled by a supply of pressurized hydraulic fluid introduced into the spider hub to control the vertical position of the movable piston.
