DRIVE AS-FAN 3891573 - Caterpillar

Stopping the engine immediately after it has been working under load, can result in overheating and accelerated wear of the engine components.See the following stopping procedure, to allow the engine to cool, and to prevent excessive temperatures in the turbocharger center housing, which could cause oil coking problems.
Note: Delayed engine Shutdown is the default and recommended way to stop the engine.
While the machine is stopped, run the engine for 5 minutes at low idle. The engine idle allows hot areas of the engine to cool gradually.
Illustration 1 g03733352
Ignition Keyswitch
(1) Delayed Engine Shutdown Override
(2) OFF
(3) ON
(4) START
Turn the engine start switch to the OFF position and remove the key. There are several machine features that can occur when stopping the engine. Note: If the "Regen Active" indicator is illuminated, do not shut off the engine. Refer to Operation and Maintenance Manual, "Monitoring System" for more information on indicators. (966M - 982M Only)Engine Idle Shutdown (If Enabled)
The engine can shut down if all of the following conditions exist:
The machine was warm when started
The engine is left idling with the transmission in neutral
No implement control movement
No right pedal movement
Engine idle shutdown is enabled in the monitoring system.The control limits the engine speed to 1000 rpm at 20 seconds before shutdown and turns on the action lamp. An alarm sounds for 20 seconds before the engine shuts down.An operator can move one of the controls in order to cancel a shutdown. Using the left brake pedal to cancel a shutdown is the recommended option for the operator.Reference: Refer to the Operation and Maintenance Manual, "Operator Controls", “Engine Idle Shut Down” section for more information.In order to restart the engine after an engine idle shut down, the keyswitch must be moved into the Off position. Then turn the keyswitch back to the On or Start positionDelayed Engine Shut Down (If Enabled)
The Delayed Engine Shutdown allows the engine to run for a time after the engine start switch is turned to the OFF position to cool the engine and system components. The engine start switch key may be removed.Note: There may be regulations that define the requirements for the operator and/or support personnel to be present when the engine is running.
Leaving the machine unattended when the engine is running may result in personal injury or death. Before leaving the machine operator station, neutralize the travel controls, lower the work tools to the ground and deactivate all work tools, and place the lever for the hydraulic lockout control in the LOCKED position.
Note: Leaving the engine unattended while running may result in property damage in the event of a malfunction.Turn the engine start switch to the OFF position.
Delayed Engine Shutdown - The delayed engine shutdown indicator will illuminate or the following text will be displayed, ENGINE COOLDOWN ACTIVE.Delayed engine shutdown will run for a minimum of 30 seconds and will continue to run until the engine and system components are cooled. The maximum run time is 10 minutes.Note: An authorized dealer can change the maximum run time