Part number 1272942C1 - A New Original Hydraulic Filter for IH Tractors With Power Priority Hydraulic Systems - 3388, 3588, 3788, 5088, 5288, 5488, 6388, 6588, 6788 Tractors, Also Fits IH Windrowers - 4000 With SN 4000 And Above, (5000, 5500 With SN 1901 And Above).