FLYWHEEL GP 3082291 - Caterpillar

this procedure to troubleshoot low engine fuel pressure or use this procedure if the following event code is active. Refer to Troubleshooting, "Event Codes" for information about event codes. You must access the engine monitoring system on Caterpillar Electronic Technician (ET) to view the current trip points for these codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".
Table 1
Event Code
Code and Description Default Conditions which Generate this Code System Response
E198(3) Low Fuel Pressure The fuel pressure is below the trip point pressure for the programmed delay time. The engine will shutdown. The code is logged. Probable Causes
Fuel tank cap
Fuel pressure regulating valve
Fuel pressure relief valve
Fuel level
Primary fuel filter and water separatorRecommended Actions
Fuel Tank Cap
Check the vent in the fuel tank cap. Clear any restrictions with compressed air.Fuel Pressure Regulating Valve
A fuel pressure regulating valve that is stuck in the open position may cause low fuel pressure. If a problem is suspected, inspect the return fuel pressure regulating valve. Clean any contamination or debris that may keep the regulating valve open. If debris is present, find the source of the contamination. Replace the return fuel pressure regulating valve if the valve is worn or damaged. Refer to Systems Operation/Testing and Adjusting for information that is related to the fuel pressure regulating valve.Fuel Pressure Relief Valve
Inspect the fuel pressure relief valve in the fuel transfer pump. Check the valve and the valve seat for debris. Make sure that the valve is not stuck in the open position.Fuel Level
Ensure that the fuel tank contains enough fuel to operate the engine.Primary Fuel Filter and Water Separator
Check the fuel filter and water separator for excess fuel pressure drop