TM 5-3825-229-14&P4-46A. THERMOSTAT AND COOLING LINES (cont)b.TestingThermostat(cont).(2)Heat water and stir gradually. Check watertemperature with a reliable thermostat.(3)Observe thermostat as water temperature rises.Thermostat should begin to open whentemperature is within 3C (5F) of the nominaltemperature (82C, 180°F). Thermostat should befully open at 12C(22F) above the nominaltemperature.(4)Thermostat is not adjustable and must bereplaced if it does not operate within the abovelimits.Testing Thermostatc.InstallationofThermostat.(1)Clean all old gasket material from cover (2) and mounting surface on water pump (3).(2)Install thermostat (7) in water pump (3) so that bypass plate is positioned above bypass opening.(3)Install new cover gasket (6) on water pump. Install cover (2), with attached hose (5), on water pump.(4)Secure cover with two screws (1) and washers (4). Tighten screws to a torque of 17 lb-ft (23 Nm) (wet).(5)Fill cooling system. Refer to para. 4-46. g.d.CoolingLines.(1)Removal.(a)Loosen clamps (1) and (4). Remove hose (2)from top of radiator (3) and from top of waterpump (5).(b)Loosen clamps (6) and (8). Remove hose (7)from bottom of radiator (3) and from bottom ofwater pump (5).(2)Installation.(a)Install hose (7) to bottom of water pump (5) andsecure with clamp (8).(b)Install hose (7) to bottom of radiator(3) and secure with clamp (6).Removing and installing Cooling Lines4-95
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