3356177 - INTRODUCTION - ENGINE LUBRICATION

Engine oil supply circuit

VIEW OF ASSEMBLY

The engine lubrication circuit is illustrated in the diagram.1, Suction head with filter mesh2, Oil pump3, Oil filter cartridge4, Main longitudinal channel5, Jets (piston skirt cooling)6, Vertical channel (camshaft mounting lubrication)7, Oil falling back into sump8, Switch for engine oil pressure warning light

Engine oil pump

The engine oil is drawn in by the sump by means of the vacuum created by the rotation of the gears on the crankshaft.There is a vacuum from the partition (2) for the gears as far as the oil sump suction head.The pressure develops starting from the partition (2) in all the engine supply ducts (4).When the pressure exceeds 5 bar, the force exerted on the restricter valve (5) overcomes the reaction of the spring underneath and moves the valve until the connecting duct between the pressure chamber (3) and the low pressure chamber (1) opens.1, Low pressure chamber2, Partition3, Pressure chamber4, Oil supply duct5, Oil pressure restricter valveENGINE OIL PRESSURE RESTRICTER VALVE IN CLOSED OPERATING POSITIONENGINE OIL PRESSURE RESTRICTER VALVE IN SHORT CIRCUIT OPERATING POSITION