450B - BULLDOZER 55 HYDRAULIC PUMP DRIVE, REMOTE CYLINDER AND COUPLER Parts group 55 HYDRAULIC PUMP DRIVE, REMOTE CYLINDER AND COUPLER 55 HYDRAULIC PUMP DRIVE, REMOTE CYLINDER AND COUPLER . BREAKAWAY COUPLING [G10] BREAKAWAY COUPLING BRACKET [G11] REMOTE CYLINDER AND HOSES [G12] REMOTE CYLINDER PARTS [G13] HYDRAULIC PUMP DRIVE AND DISCONNECT [G15]