Patent ID: 7878432

Claim:
A method for bringing a force to bear on a roller assembly by a plunger can assembly in a pulverizing mill, the method comprising the steps of: (a) seating a stub shaft in an aft end of a plunger can body of the plunger can assembly such that an aft portion of said stub shaft protrudes out of said aft end; (b) securing a locking guide in a fore end of said plunger can body, said locking guide having a center bore; (c) receiving a plunger can bushing through said center bore of said locking guide such that a portion of said plunger can bushing protrudes out of said fore end of said plunger can body; (d) containing a compression spring within said plunger can body and between said stub shaft and said plunger can bushing; (e) positioning said stub shaft to bear against the roller assembly, wherein said compression spring applies the force to said stub shaft which translates back and forth in a direction along a central axis of said plunger can body in response to the roller assembly; (f) forming a first annular flange in said plunger can body approximate to said fore end; (g) seating said first annular flange against a stiffening ring which encircles an opening in a pulverizer door of the pulverizing mill; (h) drilling a plurality of bores through said first annular flange, said stiffening ring, and said pulverizer door that align with each other and are spaced circumferentially around said first annular flange, said stiffening ring, and said pulverizer door; and (i) securing said first annular flange of said plunger can body to said stiffening ring and said pulverizer door with a plurality of nuts and bolts through said plurality of bores.