CLAMP 1081610 - Caterpillar

Checking Engine Oil Filter Service Indicator
The D379, D398 and D399 Industrial Engines, and the D379, D398 and D399 Generator Set Engines may be equipped with an engine oil filter service indicator. The oil filter service indicator is located on the top center of the oil filter housing, or... ... in the left side cover of the oil filter housing.The indicator measures the pressure difference between the inlet and outlet side of the oil filter elements. When the engine is operating under full load with the oil hot, observe the red plunger of the indicator. When the plunger raises approximately half of the height of the clear plastic window, new filter elements should be installed.If the normal oil filter change period occurs before the indicator raises, change the oil filter elements at that time.The Operation and Maintenance Guide has the necessary information for servicing engine oil filter elements.The "Maintenance Periods for Engine Filters, Oils and Breather" section of the Lubrication and Maintenance Chart has the oil filter element change interval for your engine.The "Maintenance Periods for Engine Filters, Oil and Breather" section of the guide has the instructions for changing the engine oil filter elements.