Yanmar 2TNV70 - Page 128

ENGINE
6-42
TNV IDI Service Manual
Cylinder Block
11. Remove the bearing inserts (Figure 6-53, (2)).
12. Remove the compression rings
(Figure 6-53, (3)) from the piston using a piston
ring expander.
13. Remove the oil ring (Figure 6-53, (4)) from the
piston using a piston ring expander.
Figure 6-53
14. Remove the circlips (Figure 6-53, (5)) from the
wrist pin.
15. Remove the wrist pin (Figure 6-53, (6)) and
connecting rod (Figure 6-53, (8)) from the
piston (Figure 6-53, (9)).
16. Repeat steps until all pistons are removed and
dissembled.
Removal of Crankshaft
1. Remove the flywheel (Figure 6-54, (1)) from
the crankshaft.
2. Remove the bolts (Figure 6-54, (2)) from the
flywheel housing assembly. Remove the
flywheel housing from the engine.
Figure 6-54
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 6-55, (1)) on the cylinder block. Move
the crankshaft (Figure 6-55, (2)) in and out to
measure the end play. Record the
measurement.
Figure 6-55
0001705A
(3)
(4)
(6)
(7)
(5)
(2)
(1)
(8)
(9)
(5)
0002188
(3)
(2)
(1)
(4)
(1)
(2)
0001961
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