Yanmar 2TNV70 Service Manual page 160

FUEL SYSTEM
After marking the position of the pump drive gear,
do not rotate the engine crankshaft. Rotating the
crankshaft will cause the fuel injection pump to
become misaligned.
Figure 7-11
Do not loosen or remove the four bolts retaining
the fuel injection pump drive gear to the fuel
injection pump hub. Do not disassemble the fuel
injection pump drive gear from the hub. Correct
fuel injection timing will be very difficult or
impossible to achieve.
15. Do not loosen or remove the four bolts
(Figure 7-12, (3)) holding the pump drive gear
to the hub. Only remove the single drive gear
nut (Figure 7-12, (1)) and washer
(Figure 7-12, (2)), leaving the hub attached to
the gear.
7-14
NOTICE
0002096
NOTICE
(1)
16. Hold the gear train stationary using a large
socket wrench on the crankshaft pulley bolt.
Loosen the fuel injection pump drive gear
retaining nut (Figure 7-12, (1)) and turn it out to
the end of the fuel injection pump shaft.
17. Remove the injection pump drive gear and hub
from the injection pump drive shaft as an
assembly using an appropriate gear puller
(Figure 7-13).
Note: The injection pump drive gear can be
removed from the gear case; however, it
is best to let it remain in the gear case.
Fuel Injection Pump
(2)
Figure 7-12
Figure 7-13
TNV IDI Service Manual
(3)
(1)
0002209