Doosan GL08K - Inspections After Starting; Winter Operation Considerations

Commissioning and Operation - 150 -
4.3. Inspections after Starting
During operation the oil pressure in the engine lubrication system must be monitored. If the monitoring
devices register a drop in the lube oil pressure, switch off the engine immediately.
And the charge warning lamp of the alternator should go out when the engine is running.
 Do not disconnect the battery or pole terminals or the cables.
 If, during operation, the battery charge lamp suddenly lights up, stop the engine immediately and
remedy the fault in the electrical system.
 Engine should be stopped if the color, the noise or the odor of exhaust gas is not normal.
 Confirm the following things through warning lamps and gauge panel.
4.3.1. Pressure of lubricating oil
The normal pressure comes up to 1 kg/cm2 (1.0 bar) at idling and 3 ~ 5 kg/cm
2
(3.0 ~ 4.9 bar) at
maximum speed. If the pressure fluctuates at idling or does not reach up to the expected level at high
speed, shut down the engine immediately and check the oil level and the oil line leakage.
4.3.2. Temperature of cooling water
The cooling water temperature should be 79 ~ 95 °C in normal operating conditions. Abnormally high
cooling water temperature could cause the overheating of engine and the sticking of cylinder
components. And excessively low cooling water temperature increases the fuel consumption,
accelerates the wears of cylinder liners and shortens the engine life-time.
4.4. Operation in Winter Time
Pay special attention to the freezing of cooling water and the viscosity of lubricating oil.
4.4.1. Prevention against the freeze of cooling water
When not using anti-freeze, completely discharge the whole cooling water after engine running. The
freeze of cooling water causes the fatal damages of the engine. Because the anti-freeze is used to
prevent cooling water from freeze, consult "The amount of anti-freeze".
4.4.2. Prevention against excessive cooling
Drop of thermal efficiency caused by excessive cooling increases fuel consumption, therefore prevent
the engine from excessive cooling. If the temperature of coolant does not reach to normal condition (79
~ 95 °C) after continuous operation, examine the thermostat or the other cooling lines.
4.4.3. Lubricating oil
As cold weather leads to the rise of oil viscosity, engine speed becomes unstable after starting.
Therefore the lubricating oil for winter should be used to prevent this unstability. Refer to Lubricating
System section.