TILT RELIEF VALVE GROUP 7J3972 - Caterpillar

3412 Industrial And Marine EnginesDescription of Change: The 3412 Industrial and Marine Engines have an improved engine oil cooler core assembly. The two inner end sheets have been removed, and the baffle spacer bars have been shortened. See the illustrations. Without the inner end sheets, it is possible to remove all of the brazing flux residue from the core assembly, as the core is being assembled. Formerly, it was possible for some of the flux residue to remain in the core assembly after it was assembled. The residue can cause corrosion of the tubes in the core assembly, and the tubes can fail.
Adaptable To: The new 1W7406 Cooler Core Assembly is a direct replacement for the former 6N9114 Cooler Core Assembly, which is canceled.
Illustration 1. New 1W7406 Oil Cooler Core Assembly.
Illustration 2. Former 6N9114 Oil Cooler Core Assembly.