Lombardini Engine Troubleshooting LTC Repairwc_tx000364gb.fm 745.13 Checking Oil Pressure and Coolant Temperature SwitchesSee Graphic: wc_gr0032305.13.1 If the engine starts but shuts down after approximately 10 seconds,check the following.5.13.2 Check the engine oil level and add oil if necessary. Also check thecoolant temperature. If the coolant temperature is high, allow theengine to cool. Flush and fill the radiator with the correct coolant.5.13.3 Check the wiring of oil pressure switch (a) and the coolant temperatureswitch (b) (903 engines) or (c) (1003 engines). If the wiring of eitherswitch is shorted to ground, the engine will shut down. Be sure theswitches are functioning—check each for continuity. The oil pressureswitch is a normally closed (NC) switch that should have continuitywhen the engine is off. If the switch has no continuity when the engineis off, the switch is faulty; replace it.The high coolant temperature switch is a normally open (NO) switch.This switch should have no continuity when the engine is off. If thisswitch has continuity when the engine is off, it has shorted and is faulty;replace it.wc_gr003230acb
