Yanmar 3TNV88F Service Manual page 123

Crankshaft and Camshaft Components
8. Remove the circlips (Figure 6-55, (5)) from the
wrist pin.
9. Remove the wrist pin (Figure 6-55, (6)) and
connecting rod (Figure 6-55, (8)) from the
piston (Figure 6-55, (9)).
10. Repeat the steps until all pistons are removed
and dissembled.
■ Removal of crankshaft
1. Remove the flywheel (Figure 6-56, (1)) from
the crankshaft.
2. Remove the bolts from the rear oil seal
assembly (Figure 6-56, (2-3)). Remove the
assembly from the engine.
1
Figure 6-56
3. Before removing the main bearing caps,
measure the crankshaft end play. Use either of
the following two methods.
• Method A: Install a dial gauge
(Figure 6-57, (1)) on the cylinder block. Move
the crankshaft (Figure 6-57, (2)) in and out to
measure the end play. Record the
measurement.
Figure 6-57
3TNV88F Service Manual
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K0001707A
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K0001961
• Method B: Use a feeler gauge to measure the
clearance (Figure 6-58, (3)) between the
thrust bearing (Figure 6-58, (1)) and
crankshaft (Figure 6-58, (2)). Record the
measurement. See Thrust Bearing on
page 6-7 for the service limit.
Figure 6-58
4. Remove the main bearing caps
(Figure 6-59, (3)). Be sure to note the markings
on the main bearing caps, or mark them
yourself, so they can be reinstalled in the same
order as they were removed. Do not remove the
bearing inserts at this time.
Note: The "arrows" on the main bearing caps
point to the flywheel end of the engine.
2
Figure 6-59
ENGINE
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K0001962
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046359-00X00
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6-39