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Deutz WP6C/WP4C Series Marine Diesel Engine Use and Maintenance Manual
18 5.7 Oil pressure is too low S/N Cause Troubleshooting 1 The lubrication oil is in poor quality (the specific Select proper lubrication oil to relevant specifications. 2 The diesel engine is overheated and the oil gets Troubleshoot according to items 3 The oil filter is clogged. Clean 4 There are loose pipe joints and oil leakage in the oil Check and tighten. 5 There is diesel fuel mixed in the oil. Change and find out the cause. 6 The spring for the pressure adjusting valve of the oil Replace 7 Oil pressure in the oil sump is too low or the oil pump Add some oil or reinstall the oil 8 The clearance between the connecting rod bearing and Check and replace 5.8 Diesel engine is overheated S/N Cause Troubleshooting 1 There is no sufficient coolant. Troubleshoot according to items in Section 5.6 of 2 The water inlet temperature is too Reduce the water inlet temperature. 3 The oil pressure is too low. Troubleshoot according to items in Section 5.7 of 4 The diesel engine is overloaded. Reduce its load and find out the cause. 5 Fuel injection is too late. Check and adjust. 6 There is air leakage at the piston Check and replace 7 The bearing fit is too tight. Check and properly grind. 8 The ambient temperature is too high. Implement power correction and reduce the load |