Cav / Lucas * Fuel Pulsation Damper Damper with Check Ball for DPA Diesel Injection Pumps MPN: 7139-159 B PLEASE NOTE: See 4th Picture for important information. This damper is commonly fitted to DPA pumps in many Perkins Engines. Check ball will not be necessary for every pump. Watch for the ball This damper uses a 3/4" wrench; make sure this matches up with the damper you are replacing. Some pumps that use this damper include: 3230F180, 3230F350, 3230F420, 3230F450, 3233F350, 3233F521, 3238F500, 3241F102, 3241F171, 3241F350, 3241F490, 3241F570, 3241F800, 3241F970, 3243F020, 3246910, 3248F391, 3249F010, 3249F700, 3263F141C, 3263F621, 3263F730, 3268F110, 3269F980, 3340F000, 3343F210, 3343F570, 3343F993, 3348F110, 3348F460, 3362F870, 3442432C, 3542F992, 3832F020, 3842F020 3269F580