Yanmar 3TNV88F Service Manual page 162

FUEL SYSTEM
1
Figure 7-18
1. Align the pump drive gear with the idler gear
using the reference marks made earlier.
(Figure 7-19, (1))
Figure 7-19
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 7-20, (A, B, C)) are
aligned.
7-16
K0002047
3. Install a new O-ring on the pump mounting
1
4. Align the key on the fuel injection pump shaft
K0000575B
5. Reinstall the fuel injection pump drive gear lock
1
B
B
C C
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
7 – Idler gear
Figure 7-20
flange. Apply grease to the O-ring to hold it in
place during installation of the injection pump.
Note: Ensure the tapered surface of the fuel
injection pump shaft is clean and dry.
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.
washer (Figure 7-21, (2)) and nut
(Figure 7-21, (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 7-5.
3TNV88F Service Manual
Fuel Injection Pump
2
3
4
K0001709A