Yanmar 3TNV82A Service Manual page 213

Crankshaft and Camshaft Components
Installation of Crankshaft
1. If removed, reinstall the keys and timing gear on
the crankshaft.
2. Reinstall new bearing inserts
(Figure 6-134, (1)) and thrust bearing
(Figure 6-134, (2)) in the cylinder block and
main bearing caps. Apply a liberal coat of clean
engine oil to the bearings and crankshaft
journals.
3. Place the crankshaft into 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
(Figure 6-134, (3)).
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 6-23 for specifications.
(2)
Figure 6-134
TNV DI Service Manual
(1)
(3)
0001752A
6. Rotate the crankshaft to assure it turns freely.
7. Apply ThreeBond Liquid Gasket No. 1212,
Yanmar Part No. 977770-01212 to the mounting
flange of the seal housing (Figure 6-135, (2)).
8. Align the seal housing with the two dowel pins.
9. Reinstall seal housing and seal assembly.
10. Reinstall the flywheel (Figure 6-135, (1)) and
tighten the bolts to the specified torque. See
Special Torque Chart on page 6-23 for
specifications.
(1)
Figure 6-135
Installation of Pistons
IMPORTANT
Do not allow the connecting rod to contact
the crankshaft journal during piston
installation. Damage to the crankshaft
bearing journal may result.
1. Lubricate the piston, piston rings, and cylinder
with clean engine oil or assembly lubricant.
ENGINE
(2)
(3)
0001707A
6-87