35. ENGINE OIL PAN HEATER, COOLANT HEATER 35.1METHOD OF USE In seasons when the ambient temperature when starting the engine is less than –20°C (for SAE30 engine oil, the season when the temperature is less than +4°C), start the heater immediately after stopping the engine on the previous day to prevent the temperature of the engine water and lubricating oil from going down. The connector for the heater is installed to the side face of the frame on the left side of the engine.
If the engine is stopped and the machine is to be left unused, and the engine is to be started again in ambient temperatures below –20°C (for SAE30 engine oil, below 4°C), start the heater immediately after stopping the engine to make it easier to start the engine again. The relationship between the ambient temperature and the time that the machine can be left before starting the engine again is shown in graph A. Please use this graph for reference. Graph A gives the general situation, so adjust the values to match the actual working conditions of the machine. Note that the items marked with fl must not be adjusted. Precautions when using graph A 1.
Depending on the relationship between the ambient tempera- ture and the time that the machine is left, it may be possible to start the engine without using the electric heater to maintain the temperature. However, to reduce the load on the engine starting system, use the heater to maintain the temperature after stop- ping the engine when the ambient temperature is less than –20°C (for SAE30 engine oil, the season when the temperature is less than +4°C). 2. If the ambient temperature is less than –43°C, depending on the relationship between the type of oil and the time that the machine is left, it may be difficult to start the engine using only the electric heater to maintain the temperature.
In such cases, use an electric fan heater to blow hot air and warm the engine and the inside of the engine room before starting. 3. Even when using the electric heater to maintain the temperature, if the temperature of the oil inside the engine oil pan is below –20°C, do not turn the starting switch to the START position. 5-50