Remove Crankshaft - Yanmar BY Series Service Manual

ENGINE

Remove Crankshaft

1. Drain engine oil. See Change Engine Oil and
Replace Engine Oil Filter Element on page 8-9.
2. Remove flywheel housing. See Remove and
Install Flywheel Housing on page 5-37.
3. Remove flywheel. See Remove Flywheel on
page 5-39.
4. Remove rear crankshaft seal housing. See
Replace Rear Crankshaft Seal on page 5-40.
5. Remove cylinder head. See Remove Cylinder
Head on page 5-19.
6. Remove timing case cover. See Remove
Timing Case Cover on page 5-48.
7. Remove timing chain. See Remove and Install
Timing Chain on page 5-49.
8. Remove oil sump, oil suction pipe and strainer,
and the oil pump. See Oil Pump on page 8-12.
9. Remove oil deflector (Figure 5-106, (1)).
Figure 5-106
Figure 5-106
10. Remove pistons and connecting rods. See
Remove and Disassemble Piston and
Connecting Rod on page 5-31.
5-58
11. Before removing main bearing caps, measure
crankshaft end play.
• Mount a dial indicator on the cylinder block.
Figure 5-107
( 1 )
0003797
© 2009 Yanmar Marine International
Cylinder Block and Crankshaft
Move the crankshaft in and out to measure end
play (Figure 5-107).
Figure 5-107
Specifications
Inspection Item
Crankshaft End Play
BY Service Manual
Specification
0.060 to 0.250 mm
(0.0024 to 0.0098 in.)