TM 5-4320-300-14Table 4-1 Organizational Preventive Maintenance Checks and Services - ContinuedW -WeeklyQ- QuarterlyM -MonthlyS- SemiannuallyIntervalItemItemTo BeNo. W M Q SInspected ProceduresNOTEThe cylinder block will drain faster if radiatorcap is left open.b. Close the radiator and oil cooler draincocks.CAUTIONEnsure that engine temperature does not exceed1850F (850C).c. Refill cooling system with clean water. Leave radiator cap off.d. Start engine and observe water level of radiator for evidenceof thermostat opening.CAUTIONEngine damage may occur if engine is allowedto run without water in cooling system.e. With engine running open the draincocks on the radiatorand oil cooler. Flush the cooling system with clean water.Replace water being drained by adding an equivalentamount to radiator.f. Stop the engine and drain the cooling system completely.4-29
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