OPTION AR-CAB 3534195 - Caterpillar

The exterior of the coolers can be cleaned with steam. However, do NOT blow the steam into the oil passages or on the ends of the coolers. This can damage the baffles or end plates.
DO NOT use chlorinated solvents when flushing oil coolers with rubber end sheets. Use only solvents of the mineral spirits family. Stanisol is an acceptable mineral spirit solvent. Use the solvent only as long as needed. The oil cooler must be completely flushed with clean water after a solvent has been used. Use compressed air to dry the oil cooler and apply a rust preventive if the oil cooler is not to be installed immediately.
If vendors are cleaning or flushing oil coolers for you, check to see what solvents they are using before sending them rubber end sheet oil coolers.