Part Number 3139592R4 - A New Piston Sleeve (3-7/8) For An IH D-179, D-239, D-246, D-268, D-358 Engines, CaseIH 1620 Combines, CaseIH 782 Cotton Pickers, IH 782 Cotton Pickers, CaseIH 4000, 5000 Self-Propelled Windrowers, CaseIH Industrial 248 Tractors, CaseIH 485,495, 685, 3220, 3230, 4210, 4230, 4240 Tractors, IH 433, 484, 533, 633, 684, 733, 833 Tractors, Case 380B Loader Tractors.  Old Part Numbers Are 3139592R3, 3139592R2, 3139592R1.