The John Deere AL172218 is a genuine OEM air/water heat exchanger designed for efficient cooling in John Deere agricultural machinery. This critical component ensures optimal engine performance and longevity by regulating temperatures. It is a direct replacement for previous part numbers AL163273 and AL158308, fitting various 6R Series Tractors including 6140R, 6145R, 6150R, 6155R, 6170R, 6175R, 6190R, 6195R, 6210R, 6215R, 6R 140, 6R 145, 6R 150, 6R 155, 6R 165, 6R 175, 6R 185, 6R 195, 6R 215, 6R 230, 6R 250, and R4000 Series Sprayers such as R4030, R4038, R4045. With approximate dimensions of 647.7 mm length, 304.8 mm width, and 101.6 mm height, and a weight of 11.79 kg, this heat exchanger is built to John Deere's rigorous quality standards.