Yanmar 3TNV82A-B Service Manual page 263

Fuel Injection Pump
Note: On TNV82 - 88 models the injection
pump drive gear will remain "captured" in
the gear case. On TNV94 - 106 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 7-18, (1))
and lock washer (Figure 7-18, (2)).
Figure 7-18
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 7-19, (1)).
Figure 7-19
TNV DI Service Manual
Note: Some model engines may require the
(1)
(2)
23. If required, remove the intake manifold and fuel
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Note: The MP2 fuel injection pumps
24. Remove the fuel injection pump
(1)
0000593 0000593A
intake manifold and fuel injection pump
insulator (Figure 7-20, (2)) be removed
to access the inner fuel injection pump
(Figure 7-20, (1)) retaining nuts.
(2)
(1)
Figure 7-20
pump insulator to access the fuel injection
pump mounting nuts.
(TNV82 - 88 model engines) are
fastened to the gear case with three (3)
studs and nuts. The MP4 fuel injection
pumps (TNV94 - 106 model engines) are
fastened to the gear case with four (4)
studs and nuts.
(Figure 7-20, (1)). For purposes of future
injection timing purposes, record the fuel
injection pump timing index number located on
the boss on the engine side (back) of the of the
fuel injection pump (Figure 7-21, (1)).
FUEL SYSTEM
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7-23