2. Operation and Management Operation in Winter antifreeze at revised ratio when replacing or replenishing the coolant. The antifreeze prevents Cold Start Periodically check for frozen coolant and viscosity of coolant from freezing. lubrication oil. CAUTION Preventing Overcooling of the Engine A preheater should be mounted on the engine to improve the cold start performance. When the engine is cooled below the normal operating temperature, thermal efficiency is lowered and fuel consumption as well as abrasion of the Start the engine after turning off the preheating lamp. cylinder liner may increase. Therefore, the engine Do not operate the starter motor for over 10 seconds.
If the engine does not start even though it is fully preheated, wait for about 30 seconds, preheat the engine again, and then start the engine. should be operated within the normal operating temperature. If the engine has been sufficiently operated, but the temperature of coolant remains below the normal operating temperature, check the water temperature controller or other parts related to the cooler. Perform the cold start in the following order. 1. Turn the key switch to 'Preheat' and then the Engine Oil preheat lamp will operate for about 20 seconds.
When the viscosity of engine oil increases due to its low temperature during cold weather or in areas with Note) Operate the preheater if coolant is below 10 °C during cold weather. If preheating is not necessary, the preheat lamp will not switch on. cold climate, the rpm may not be stable after starting the engine. To prevent this, replace the oil with 2. When the preheat lamp switches off, turn the key engine oil for cold weather or areas with cold climate. When replacing engine oil, Use only engine oil switch to 'Start' to start the engine. recommended by Doosan.
Note) If the key is turned to 'Start', the air heater is continuously heated to provide an easy start and reduce white exhaust gas. If the coolant temperature is above 10°C , it is not necessary to heat the air heater. 3. After starting the engine, the key switch changes to ON. CAUTION As the ECU heats the intake air for about 180 seconds after starting the engine, the white exhaust gas is reduced quickly. Preventing Coolant from Freezing. When only water used as coolant without mixing with antifreeze, corrosion in the engine, degradation of cooling efficiency, and freezing of the engine in winter may occur.
If the engine is not operated for a long period during cold weather or in areas with cold climate, fully discharge the coolant from the engine. Freezing of coolant leads to critical damage to the engine. Please use a mixture of coolant with 2 - 6