SEAL FOR COILED SPRING ASSEMBLY

A coil spring assembly for connection with a separator body to apply a spring force to a grinding roll of a journal assembly to pulverize solid fuel. The coil spring assembly includes: a preload stud having a first end in communication with the journal assembly and an exposed opposite second end extending from the coil spring assembly; a spring adjustment bolt and bearing assembly being fixed relative to the preload stud extending therethrough; and a seal being substantially cylindrical shaped and flexible at least along a central axis thereof. The seal has a first end operably secured to the spring adjustment bolt and bearing assembly and an opposite second end operably secured to the second end of the preload stud thereby sealing a bushing area corresponding to a portion of the preload stud surrounded by the spring adjustment bolt and bearing assembly from ground solid fuel dust and allowing movement of the preload stud at least along the central axis thereof to apply the spring force from the coil spring assembly to the grinding roll.