7- motor drive v-belt pulley bushing 8- gear and pinion jaw crusher spare parts 1jaw- fxed and movable 2-key fxed and movabel (for mj 90) 3-key fxed and movabel (for mj 110 and mj 130) 4-toggle plate 5-toggle plate seat adjuster 6-v-belt pulley and fly wheell 7-toggle plate seat 8-side wear plates mti tertiary ... The primary object of this invention is an improved rotary jaw crusher. FIG. 1 is an elevated view of a typical system employing a prior art horizontal feed jaw crusher. FIG. 2 is a side view of the FIG. 1 system. FIG. 3 schematically depicts in cross-section a typical prior art vertical feed jaw crusher.