TM 5-3805-261-20COOLING SYSTEM MAINTENANCE.6-48.RadiatorServicing.(Sheet 2 of 4)DRAININGWARNINGSTEAM UNDER PRESSURELoosen radiator cap slowly to relievepressure before completely removingwhen the engine is hot. Failure tofollow this procedure may causeINJURY. If you are scalded by steam,seek medical aid immediately.CAUTIONIf machine is to be stored in, orshipped to an area with belowfreezing temperatures, the coolingsystem must either be protected tothe lowest expected ambienttemperature, or drained completely.When permanent antifreeze and watersolutions are used in the coolingsystem, the solution should bedrained and replaced every 2000service hours or one year, whichevercomes first.1.Loosen radiator cap (1, Figure 6-120) slowlyto relieve pressure and remove.2.Open drain cock (2, Figure 6-121) underradiator and drain coolant in suitablecontainer.3.Close drain cock (2).Figure 6-121.Go to Sheet 36-171Figure 6-120.
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