Yanmar 4TNV98 Service Manual page 153

20. Remove the pump drive gear and hub as an
assembly using an appropriate two-bolt gear
puller (Figure7-14).
Figure7-14
NOTE: On TNV98 models, the injection pump drive
gear can be removed through the gear case cover
opening.
21. Once the fuel injection pump drive gear and hub
assembly has "popped" loose from the tapered
fuel injection pump drive shaft, carefully remove
the drive gear nut (Figure 7-15, (1)) and lock
washer (Figure 7-15, (2)).
Figure 7-15
4TNV98 & 4TNE98 Diesel Engine
22. Locate the mark stamped into the upper outside
mounting boss of the fuel injection pump.
Highlight this mark and make a corresponding
mark on the gear case or front plate (Figure 7-
16, (1)).
NOTE: Some model engines may require the intake
manifold and fuel injection pump insulator (Figure
7-17, (2)) be removed to access the inner fuel
injection pump (Figure 7-17, (1)) retaining nuts.
23. If required, remove the intake manifold and fuel
pump insulator to access the fuel injection
pump mounting nuts.
151
Figure 7-16
Figure 7-17
Section 4. Fuel System