DS21 & DS21M / DS19A & DS19MA Repair Manual — Page 311

14, Fit the wheel-arm bearing housing. a) Fit the sealing cup (1) using a tube outside diameter = 60 mm inside diameter = 56mm length = 200 mm b) Place the bearing (3) in housing (4) and fit the gasket (2) with a tube: outside diameter 79 mm inside diameter = 67mm length = 100 mm c) Fit the housing (4) on the arm, Insert 50 g . of special bearing grease in the housing.