2022-11-01
Idle Engine A Few Minutes Before Shut-Down
It is important to idle an engine 3 to 5minutes before shutting it down to allow the lubricating il and water to carry heat away from the combustion chamber, bearings, shafts etc. This is especially important with turbocharged engines.
The turbocharger contains bearings and seals that are subject to the high heat of combustion exhaust gases. While the engine is running, this heat is carried away by oil circulation, but if the engine is stopped suddenly, the turbocharger temperature may rise as much as100°F[38°C]. The results of the extreme heat may be seized bearings or loose oil seals.
Do Not Idle Engine for Excessively Long Periods
Long periods of idling are not good for an engine because the combustion chamber temperatures drop so low the fuel may not burn completely. This will cause carbon to clog the injector spray holes and piston rings and may result in stuck valves.
If the engine coolant temperature becomes too low raw fuel will wash the lubricating oil off the cylinder walls and dilute the crankcase oil so all moving parts of the engine will suffer from poor lubrication
If the engine is not being used ,shut it down
Turn Switch to “Off” Position to Shut Down the Engine
The engine can be shut down completely by turning off the switch on installations equipped with an electric shut-down valve, or by turning the manual shut-down valve knob. Turning off the switch which controls the electric shut-down valve stops the engine unless the override button on the shut-down valve has been locked in the open position. If the manual override on the electric shut-down valve is being used turn the button fully counterclockwise to stop the engine. Refer to Normal Starting Procedure”. The valve cannot be reopened by the switch until after the engine comes to a complete stop unless a rapid restart valve is installed.
Caution: Never leave the switch key or the override button in the valve open or in the run position when the engine is not running. With overhead tanks this would allow fuel to drain into the cylinders causing a hydraulic lock.
Stop Engine Immediately If Any Parts Fail
Practically all failures give some warning to the operator before the parts fail and ruin the engine Many engines are saved because alert operators heed warning signs (sudden drop in oil pressure unusual noises ,etc.) and immediately shut down the engine.
