Yanmar 4BY, Service Manual, Page: 100 / 275

ENGINE
BY Service Manual 5-45
Flywheel and Flywheel Housing
7. Install bolts and tighten securely.
8. Install oil sump. See Remove and Install Oil
Sump on page 8-16.
9. Install crankshaft sensor. See Replacing
Crankshaft Sensor on page 12-26.
10. Install flywheel. See Installation of Flywheel on
page 5-45 .
11. Add engine oil to the correct oil level.
Installation of Flywheel
Figure 5-68
1. If removed, install the pilot bushing
(Figure 5-65, (3)) in the crankshaft.
2. Install torque plate (Figure 5-65, (2)) .
IMPORTANT
Never reuse flywheel bolts. Always install
new flywheel bolts.
3. Install the flywheel on the crankshaft.
Note: Flywheel bolts are T-60 Torx head.
4. Apply medium strength thread lock and sealer
to the threads of the flywheel bolts
(Figure 5-65, (1)) . Install bolts and tighten to
initial torque specification.
Flywheel Bolt Torque
5. Tighten flywheel bolts to final torque
specification.
6. Install drive coupling ( See Remove and Install
Drive Coupling on page 5-42 ).
7. Install flywheel housing ( See Remove and
Install Flywheel Housing on page 5-42 ).
Item Initial Torque Final Torque
Flywheel Bolt
15 N·m
(133 in.-lb)
120 N·m
(89 ft-lb)
000 3 577
(1)
(2)
(
3
)