Yanmar 3TNV82A-B Service Manual page 229

Crankshaft and Camshaft Components
Installation of Timing Gears
1. Set the No. 1 piston to top dead center.
2. Rotate the camshaft until the mark
(Figure 6-147, (C)) is approximately at the
9 o'clock position.
(1)
B
B
A
(7)
(6)
(5)
1 – Fuel Injection Pump Gear
2 – Camshaft Gear
3 – Optional Accessory Drive Gear
4 – Crankshaft Gear
5 – Direction of Rotation
6 – Oil Pump Gear
7 – Idler Gear
Figure 6-147
3. Lubricate the idler gear (Figure 6-148, (2)),
bushing (Figure 6-148, (3)) and idler gear shaft
(Figure 6-148, (1)) with clean engine oil.
Figure 6-148
4. Align the timing gears as shown in
(Figure 6-147).
TNV DI Service Manual
(2)
C C
A
(3)
(4)
0001709A
(2)
(3)
(1)
0001728A
5. Reinstall the idler gear and idler gear shaft. Be
sure the oil hole in the bushing is facing toward
the top of the engine.
6. Ensure all three timing marks
(Figure 6-147, (A, B, C)) are aligned.
7. When all gears are properly aligned, tighten the
idler gear retaining bolts to specified torque.
See Special Torque Chart on page 6-25 for
specifications.
Installation of Gear Case Cover
1. Apply a continuous bead of ThreeBond Liquid
Gasket No. 1212, Yanmar Part No. 977770-
01212 to the mounting area of the gear case
cover (Figure 6-149, (1)). Be sure to circle the
bolt holes.
IMPORTANT
3TNV84 - 4TNV88 engines: Be sure to
align the flats on the oil pump with the flats
on the crankshaft gear when installing the
gear case cover.
2. Reinstall and tighten the gear case cover bolts.
(1)
Figure 6-149
3. Reinstall the crankshaft pulley.
ENGINE
0001641A
6-97