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CRANKSHAFT, MAIN BEARING CONSTRUCTION [MZR-CD (RF Turbo)]

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## Structure

• A five axle-hole, 8 counter weight steel crankshaft has been adopted.
• An oil line for supplying oil to each journal is provided in the crankshaft. Crank pins and fillets on both sides of the journal are rolled to bear heavy loads.
• Upper and lower main bearings are made of aluminum alloy and thrust bearings are used at the No.3 journal. The upper main bearing has oil grooves and oil holes.

1 | Upper thrust bearing
2 | Oil pump drive gear
3 | Upper main bearing
4 | Lower main bearing
5 | Main bearing cap
6 | Lower thrust bearing
7 | Oil passage
8 | Lolled