CRANKSHAFT, MAIN BEARING CONSTRUCTION [ZY, Z6]


id0110b0100800

• A cast iron, five-bearing, four-counter weight crankshaft has been adopted for correction of crankshaft related balance.

• 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. The upper main bearing has oil grooves and an oil hole.

• There is no upper and lower bearings positioning tab for installing the main journal.

• Measure and attach the main bearings (upper and lower) so that they are positioned at the center of the main bearing cap.

• Three kinds of main bearings are available depending on the oil clearance.

Bearing size

Bearing thickness (mm {in})

Standard
2.511-2.529 {0.0989-0.0995}
0.25 {0.01} Oversize
2.625-2.635 {0.1034-0.1037}
0.50 {0.02} Oversize
2.750-2.760 {0.1083-0.1086}