Cummins 3002956 Water Transfer Tube

The Cummins 3002956 water transfer tube is a cooling system component designed to facilitate coolant flow between engine blocks and cylinder heads or external cooling circuits. It is manufactured from aluminum alloy to withstand high coolant temperatures and resist corrosion in heavy-duty diesel applications. This tube serves Cummins large-bore engine platforms including the KTA19, KTA38, KTA50, NT855, and QSK19, QSK38, QSK50, QSK60 series. It functions as a critical conduit in the engine cooling network, maintaining thermal stability under continuous high-load operation. The part is referenced by OEM number 3002956 and aftermarket cross-reference M-3002956 (Interstate-McBee) and 206709. Installation typically requires associated gaskets or O-rings for sealing at connection flanges.