HOSE AS 3815908 - Caterpillar

pelleted filters have been historically used on some Cat machines or engines. The main function of these pelleted filters was to allow dosing of the supplemental coolant additives into the cooling systems that used DEAC coolants. Starting in 2013, Caterpillar pelleted coolant filters will be discontinued and will be replaced with a non-pelleted filter and direct dosing with supplemental coolant additive (SCA).Note: The coolant pelleted filters are discontinued during 2013. The non-pelleted filter replacements require that the cooling system using Cat DEAC should be dosed directly with the supplemental coolant additive. For the recommended dosing volumes and dosing intervals follow the instructions provided in Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations" or Special Publication, SEBU6251, "Cat Commercial Diesel Engine Fluids Recommendations".The coolant filters that replaced the pelleted filters are a spin-on filter design. Servicing of these filters is recommended as follows:
Replace the filter when you change the coolant fluid.
If signs of corrosion appear on the filter, specifically at the top of the filter where the filter is assembled into the system. Inspect the filter for corrosion every time you dose the system with coolant additives.