Oil circuit diagram
1. Oil pressure sensor
2. Bypass valve (opens when oil filter is clogged)
3. Oil overpressure valve (opens at too high pressure)
Through the receiving grid, the pump takes engine oil from the oil pan and pumps it into the main oil filter. There is an overpressure valve on the pressure side of the oil pump (oil pressure control valve). If the oil pressure is too high, the valve opens and part of the oil flows into the oil pan.
Through the central axis of the filter element, the filtered oil enters the main pipeline. When the oil filter is clogged, the bypass valve directs the crude oil directly into the main pipeline. There is a non-return valve in the oil filter pipe that prevents the oil passages and hydraulic poppets from idling.
Channels for lubricating the main bearings of the crankshaft branch off from the main pipeline. Through inclined holes in the crankshaft, oil enters the connecting rod bearings, and from there it sprays and gets on the piston pins and cylinders.
At the same time, oil is supplied through vertical pipelines to the cylinder head and provides lubrication to the main bearings of the camshaft and bucket tappets.
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