Yanmar 3YM30, Service Manual

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4. Disassembly and reassembly
88
(34)Removing the main bearing
1) Remove the main bearing bolts.
2) Remove the main bearing cap and lower main
bearing metal.
NOTE:
The thrust metal (lower) is mounted to the base main
bearing cap.
(35)Removing the crankshaft
1) Remove the crankshaft
NOTE:
1) The thrust metal (upper) is mounted to the
standard main bearing of the cylinder block.
2) Remove the main bearing metal (upper) from the
cylinder block.
(36)Removing the tappets
Remove the tappets from the tappet holes in the
cylinder black.
NOTE:
1) Be careful to keep all disassembled parts in order.
2) Prepare clear and adequate area for parts and a
container(s).
3) Prepare a cleaner before disassembling.
(Removing main bearing and crankshaft)
Crankshaft
Thrust metal
Main bearing
(Base)
Cylinder block
Main bearing
Main bearing bolt