PLUG-ORIFICE 2648153 - Caterpillar

Proper operation, driving techniques and maintenance are key factors in obtaining the maximum service life and economy of Caterpillar engines. Following the recommendations in this manual will lower operation costs. For more information, ask your Caterpillar dealer for LEDT2254, CAT Answers Your Questions About Truck Performance.Idling
Idle speed is adjustable on Caterpillar electronic engines. Consult your Caterpillar dealer for information. The idle speed preset to 700 rpm. Avoid excess idling. If the vehicle is parked for more than five minutes, STOP the engine. An engine can burn from 2.8 to 5.7 L (.7 to 1.5 US gal) of fuel per hour while idling. Excessive idling can cause excessive carbon buildup and/or slobber, which is harmful to the engine.If extended idle time is required, control the engine speed to 1000 rpm or greater and take steps to ensure that the coolant temperature exceeds 82°C (180°F). Consult your Caterpillar dealer for assistance.Fast idle can be programmed within the range of 700 to 1600 rpm. Fast idle requires an ON/OFF switch on the dashboard. Consult your Caterpillar dealer for assistance.Idle Shutdown Timer
The idle shutdown timer can be programmed to shut the engine down after a specific time period of engine idling. The idle time can be programmed from 3 minutes to 1440 minutes (24 hours). If the idle shutdown timer is set to 0 minutes, the idle shutdown feature is disabled. If the timer setting is unknown, allow the engine to idle and observe how much time elapses before the engine shuts down. The following conditions must be met in order to activate the idle shutdown timer.* The idle shutdown feature must be selected* No vehicle speed is detected by ECM* The engine is not under load* The engine is at operating temperature (NOT in Cold Mode)After the vehicle is stationary, the idle shutdown timer begins. The engine can be operating at low idle or at an idle rpm selected by the PTO governor. The CHECK ENGINE/DIAGNOSTIC (YELLOW) lamp will flash rapidly 90 seconds prior to shutdown. Movement of the vehicle automatically resets the idle shutdown timer to the programmed setting.To override the idle shutdown timer:1. Program the ALLOW IDLE SHUTDOWN OVERRIDE to YES.2. The CHECK ENGINE/DIAGNOSTIC (YELLOW) lamp will flash rapidly 90 seconds prior to shutdown. Depress the service brake or the clutch pedal during the 90 seconds when the YELLOW lamp flashes.After an idle shutdown, the engine can be restarted without turning the ignition key switch to the OFF position.The override capability is disabled If the ALLOW IDLE SHUTDOWN OVERRIDE is programmed to NO.Cold Mode Operation
Cold mode is initiated if the sum of the coolant temperature and the air inlet temperature is less than 35°C (95°F). In cold mode, the low idle is increased to 1000 rpm and the engine power is limited. The cold mode strategy provides reduced smoke emission and faster warm-up time.Cold mode is deactivated when the temperature condition is met, or when the engine has been operating for 12 minutes.After cold mode is completed, the