FUEL
INJECTION
AND
GOVERNOR
SYSTEMS 149
19. Connect the high-pressure fuel line to the injector.
20. Install the retainer plate so the side with bumps (Fig-
ure
32) is down and contacts the injector.
21. Install the retaining nuts. Tighten the nuts evenly to
20 Nem (14.5 fl.-lb.).
22. Connect the fuel return line.
23. Reattach fuel line retaining brackets.
24. Bleed the fuel injection system as described in this
chapter. Run the engine and check for leaks.
FUEL
INJ ECTION
PUMP
The fuel in
jec
tion pump is built to precise specifications
and is easily damaged by contamination from dirt or de-
bris. Due to the close tolerances in the pump and the spe-
cial tools and equipment required for overhaul and
testing, have a Yanmar dealership or diesel fuel injection
shop perform any unnecessary service .
Removal and Installation
WARNING
Serious fire hazards always exist around
diesel
fuel. Do not allow any smoking in ar-
eas where
fuel is present. Always have
afire
extinguisher. rated
for
fuel and electrical
fires, on hand when servicingany part
of
the
fuel
system.
I. Close the fuel shutoffvalve.
2. Thoroughly clean the fuel injection pump and the area
around the pump
of
all debris.
NOTE
Plug or cap
allfuel
openings to prevent the
entrance
of
debris.
3. Detach the fuel supply line from the fuel injection
pump (A, Figure 33).
4. Unscrew the fuel line retaining brackets. Remove the
fuel injection line(s) between the fuel injection pump and
fuel injector(s)
(8,
Figure 33).
5. Remove the injection pump retaining nuts (C,
Figure
33).
NOTE
Removing the oil fill cap on
lGM
and
IGMI0 models provides access to the
gov-
7
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