Part number 551181 - A New Grease Fitting For The Over Running PTO Clutch On A New Idea 526, 527, 528, 5209, 5406, 5407, 5408, 5409 Disc Mowers, CaseIH 3204, 3205, 3206 Disc Mowers, CaseIH 3309 Disc Mower Conditioners.  Old Part Numbers Are 700708915, ZA551181.