Yanmar 3JH4E Service Manual page 97

(35) 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.
(36) Removing the crankshaft
1) Remove the crankshaft.
NOTE:
1) The thrust metal (upper) is mounted to the
standard main bearing.
2) Remove the main bearing metal (upper) from the
cylinder block.
(37) Removing the tappets
Remove the tappets from the tappet holes in the cylinder black.
[Precautions when disassembly]
1) Be careful to keep all disassembled parts in order.
2) Clear and adequate area for parts and prepare a container(S).
3) Prepare a cleaner and cleaning can before disassembling start.
4. Disassembly and Reassembly
Thrust metal
Main bearing
(Base)
(Removing main bearing and crankshaft)
81
Crankshaft
Main bearing
Main bearing bolt