1 RS110170 Removing cylinder barrel • Unscrew and remove guide rail bearing screw (1). • Unscrew and remove cylinder retaining screws, and remove cylinder. e Caution: When removing cylinder, ensure that the piston does not strike the engine block. Removing/dismantling piston • Remove both retaining rings on piston pin. • Press out piston pin by hand. • Remove piston. • Carefully remove piston rings with piston ring pliers. • Remove carbonized oil from base of piston/clean the piston. e Caution: Do not accidentally confuse pistons, piston pins or piston rings. 11.30