TM 5-6115-593-34NAVFAC P-8-631-34TO-35C2-3-463-2top part of the top tank, from 1 to 3 inches (2.54 to 7.62cm), so that a cushion of air is trapped here to take careof normal surge.17-45. A strainer is used in the water line returning fromthe radiator to catch dirt, scale, and core sand. Theelectric auxiliary water pump shown in figure 17-13 isused to assist the engine driven pump in maintaining thedesired coolant flow rate which would have beenreduced in remoting the radiator by the line and fittingdrop incurred by the additional piping. A drain valveshould be incorporated to facilitate servicing theradiator.17-46. The pipe size utilized should be the same sizeas the radiator inlet an outlet fittings. Use the same pipesize throughout the entire system. Use straight lengthsof pipe wherever possible in conjunction with radiuselbows wherever turns are required.17-47. Flexible hoses used to isolate vibration shouldbe used at the inlet and outlets of both the engine andradiator.17-48. The fan motor and electric auxiliary pump mustbe electrically connected to ensure their operationwhenever the unit is running.17-49. For applications in which the radiator ispositioned at some horizontal distance from the unit andis not the highest point in the water system theconfiguration shown in figure 17-14 is recommended.The surge tank, located in a position elevated above theradiator provides the space to accommodate the naturalexpansion of heated water and the air and gasestrapped and dissolved in the water. The surge tank isvented permitting escape of vapor and air.Figure 17-14. Remote Radiator Application "B"17-17
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