Yanmar 3TNV82A Service Manual page 240

FUEL SYSTEM
Figure 7-20
2. If installing the fuel injection pump on an engine
with the front gear case cover removed, the fuel
injection pump drive gear can be aligned with
the idler gear by aligning the stamped marks
(A, B, C) on the fuel injection pump drive gear,
idler gear, and crankshaft drive gear. Ensure all
three timing marks (Figure 7-21, (A, B, C)) are
aligned.
(1)
B
B
A
(7)
A
(6)
(5)
1 – Fuel Injection Pump Drive Gear
2 – Camshaft Drive Gear
3 – Auxiliary Drive Gear (Optional)
4 – Crankshaft Drive Gear
5 – Direction of Rotation
6 – Oil Pump Drive Gear (4TNV94L - 4TNV106)
7 – Idler Gear
Figure 7-21
3. Install a new O-ring on the pump mounting
flange. Apply grease to the O-ring to hold it in
place during installation of the injection pump.
7-22
(1)
0002096
(2)
C C
(3)
(4)
0001709A
Note: Ensure the tapered surface of the fuel
injection pump shaft is clean and dry.
4. Align the key on the fuel injection pump shaft
with the keyway in the fuel injection pump drive
gear hub. Reinstall the fuel injection pump into
the fuel injection pump drive gear and gear
housing. Reinstall the pump retaining nuts
finger tight.
5. Reinstall the fuel injection pump drive gear lock
washer (Figure 7-22, (2)) and nut
(Figure 7-22, (1)). Do not lubricate the threads
of the nut or shaft. Hold the crankshaft pulley
bolt with a socket wrench and tighten the drive
gear nut to the specified torque. See Special
Torque Chart on page 7-8.
Figure 7-22
If reinstalling the original fuel injection pump:
• Align the reference marks (Figure 7-23, (1))
previously made on both the fuel injection
pump mounting flange and gear case or front
plate.
TNV DI Service Manual
Fuel Injection Pump
(1)
(2)
0000162B