The oil pump takes oil from the engine sump through the oil receiver and delivers it through the filter through the channels to the parts of the connecting rod and piston group, the crankshaft and the parts of the cylinder head.
The oil pressure is controlled by a pressure reducing valve located in the oil pump.
Oil pressure in the system:
- 1.0 bar at idle;
- 3.5 bar at 3000 min–1.
Pic. 3.90. Oil pump details: 1 - bolts; 2 - hairpin; 3 - adjusting screw of the pressure reducing valve; 4 - spring; 5 - plunger of the pressure reducing valve; 6 - oil receiver; 7 - pump casing; 8 - drive sprocket
Details of the oil pump are shown in fig. 3.90.