John Deere RE39121 Water Pump Assembly

The RE39121 water pump assembly is engineered for John Deere 6076 series 7.6L and 6068 series 6.8L PowerTech diesel engines. It utilizes a gear-driven design with a 14-tooth drive gear to ensure precise coolant circulation timing and high-flow capacity required for heavy-duty agricultural and industrial applications. The unit features a cast iron housing for structural rigidity and thermal stability under continuous high-load operation. This assembly supersedes previous part numbers RE49540, RE68229, and RE68230, incorporating updated sealing technology and bearing specifications for extended service intervals. It serves as a direct replacement for cooling system maintenance on a wide range of John Deere tractors, combine harvesters, cotton pickers, motor graders, and excavators equipped with the specified engine platforms.