Yanmar 2TNV70 Service Manual page 142

ENGINE
(2)
Figure 6-90
3. Install the crankshaft in the engine.
IMPORTANT
The main bearing caps are numbered and
have arrows for proper positioning. The No.
1 cap is at the flywheel end. The arrows
point toward the flywheel end of the engine.
4. Reinstall the main bearing caps.
5. Apply a light coat of clean engine oil to the
bearing cap bolts and tighten the bolts to the
specified torque in two stages (1/2 then full
torque). See Special Torque Chart on
page 6-13.
6. Rotate the crankshaft to ensure it turns freely.
7. Apply ThreeBond Liquid Gasket No. 1212,
Yanmar Part No. 977770-01212 to the mounting
flange of the flywheel housing
(Figure 6-91, (2)).
8. Align the flywheel housing with the two dowel
pins (Figure 6-91, (3)).
9. Reinstall flywheel housing and seal assembly.
10. Reinstall the flywheel (Figure 6-91, (1)) and
tighten the bolts to the specified torque. See
Special Torque Chart on page 6-13.
6-56
(1)
(1)
0002189
Installation of Pistons
Do not allow the connecting rod to contact
the crankshaft journal during piston
installation. Damage to the crankshaft
bearing journal may result.
1. Lubricate piston, piston rings, and cylinder with
clean engine oil or assembly lubricant.
2. Rotate the crankshaft so the crankpin for the
piston being installed is near bottom dead
center.
Cylinder Block
(2)
(4)
Figure 6-91
IMPORTANT
TNV IDI Service Manual
(3)
0002188