SHAFT A. 0006386 - Caterpillar

Stopping the engine immediately after it has been working under load can result in overheating and accelerated wear of engine components.Refer to the following procedure to allow the engine to cool and to prevent excessive temperatures in the turbocharger housing, which could cause oil coking problems.
While the machine is stopped, run the engine for five minutes at low idle.
Illustration 1 g01141200
Turn the start switch key to the OFF position. Remove the start switch key. Idling the Engine for Extended Periods
If the machine is parked and left running for extended periods of time, set the engine speed at an RPM that is slightly higher than low idle. Idling the engine at a higher RPM ensures good engine lubrication.