Yanmar 3TNV82A Service Manual page 216

ENGINE
1. If removed, reinstall the camshaft end plate
(Figure 6-141, (1)), key, and timing gear
(Figure 6-141, (4)) onto the camshaft using a
press.
Note: Heat the gear to 356 - 392°F
(180 - 200°C) and press onto the end of
the camshaft.
2. Rotate the cylinder block so that gravity will
keep the tappets (Figure 6-141, (5)) in place
and out of the way of the camshaft lobes when
the camshaft is being reinstalled.
Note: If the engine is not installed on an engine
repair fixture, stand the engine upright on
the flywheel end mounting flange.
Note: The tappets are "mushroom" shaped and
must be installed from inside the engine
crankcase.
3. Lubricate the tappets with clean oil or assembly
lube. Reinstall the tappets in their respective
locations in the cylinder block. Push the tappets
fully into the tappet bores so they will not
interfere with the installation of the camshaft.
4. Lubricate the camshaft (Figure 6-141, (2)) with
clean engine oil or assembly lube. Slowly insert
the camshaft through the front of the engine.
5. Reinstall and tighten the cap screws
(Figure 6-141, (3)).
Figure 6-141
6. If removed, reinstall the fuel injection pump.
Adjust the fuel injection timing the engine after
installation. See Adjusting Fuel Injection Timing
on page 7-30.
6-90
(5)
(2)
(1)
(4)
(3)
0001966
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 6-142, (C)) is approximately at the
9 o'clock position.
(1)
B
B
A
(7)
A
(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 6-142
3. Lubricate the idler gear (Figure 6-143, (2)),
bushing (Figure 6-143, (3)) and idler gear shaft
(Figure 6-143, (1)) with clean engine oil.
Figure 6-143
4. Align the timing gears as shown in
(Figure 6-142).
TNV DI Service Manual
(2)
C C
(3)
(4)
0001709A
(2)
(3)
(1)
0001728A