ROD 1237640 - Caterpillar

Stopping the engine immediately after it has been working under load can result in overheating and accelerated wear of engine components.Excessive temperatures in the turbocharger centerhousing will cause oil coking problems. Excessive temperatures in the turbocharger centerhousing may damage the turbocharger bearing/shaft system and significantly shorten the life of the turbocharger.Allow the engine to gradually cool before stopping the engine
There may be several ways to stop the engine. Ensure that the stopping procedure is understood. Use the following general guidelines for stopping the engine.
Disengage the driven equipment. Unload the compressor or pump.
Disengage the clutch (if equipped).
Place the transmission and/or other attachments for the power take-off in NEUTRAL.
Reduce the engine rpm to low idle. Operate the engine at low idle rpm for a cool down period before stopping the engine.For additional information on cool down, stopping, and rapid stop configurations, refer to the Application and Installation Guide.
If the engine has been operated at a low load, operate the engine at low idle for approximately 30 seconds before stopping the engine.
If the engine has been operated at a high load, operate the engine at low idle for 3 to 5 minutes before stopping the engine.
Shut off the engine according to the instructions that are provided by the OEM of the installation.The engine will coast to a stop. Ensure that any system that provides external support to the engine operation is secured after the engine is stopped.