Engines NOTE: Long periods of idling are not good for an engine because the combustion chamber tempera- tures drop so low that the fuel may not burn com- pletely. This will cause carbon to clog the injector spray holes and piston rings, and may result in perature, and coolant level. There are four customer programmable levels for Caterpillar engine monitoring: off, warning (factory default), derate, and shutdown. In the engine monitoring off mode the ECM will ignore the oil pressure sensor and coolant level sensor (if in- stalled). Engine monitoring warning mode uses oil pres- sure, coolant temperature, intake manifold temperature, and the coolant level sensor (if installed and enabled).
The CHECK ENGINE indicator will flash and the warn- ing light will come on when the diagnostic code is ac- tive. Engine monitoring derate and shutdown modes allow the ECM to alter engine performance or stop the engine to help the engine avoid damage and return to normal conditions. stuck valves.If the engine coolant temperature be- comes too low, raw fuel will wash the lubricating oil off the cylinder walls and dilute the crankcase oil, causing all moving parts of the engine to suffer from poor lubrication. Caterpillar Proper operation and maintenance are key factors in obtaining the maximum life and economy of a vehicle engine.
Follow the directions in the Caterpillar Opera- tion and Maintenance Manual and this manual for trouble-free, economical engine operation. 1. Operate the engine at low load. After minimum oil pressure is reached and the temperature gauge needle begins to move, the engine may be oper- ated at full load. Caterpillar electronic engines can be equipped with a variety of options designed to warn the driver of engine malfunctions. The driver of a vehicle equipped with these engines should know the extent of the warning system in order to bring the vehicle to a safe stop if the engine malfunctions.
If the driver doesn’t understand how the warning system works, an engine shutdown could cause a safety hazard. Caterpillar electronic engines automatically idle at 900 to 1000 rpm for the correct warm-up time after a cold engine start of less than 40°F (5°C). These electronic engine systems will reduce the idle speed to 600 rpm when the engine has warmed sufficiently to operate the vehicle. The electronic control system can monitor engine oil pressure, coolant temperature, intake manifold air tem- 4.10