Radiator Cooler 2 : An auxiliary cooling unit that circulates water from a pump through a heat exchanger to cool the radiator fluid in a pumper's engine
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}