Here’s some pics of a Caterpillar 777G truck radiator with the two aftercoolers. The radiator came in with brass modular cores, or sections. Several of the fins in the cores were deteriorated from external contamination of a corrosive material such as salt. We eneded up replacing all the cores with aluminum replacements from Caterpillar. Both of the aftercoolers are aluminum & we were able to repair them back to satisfactory condition. After passing the pressure test both aftercoolers & the radiator are ready for another round of service.
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