Yanmar 3TNV82A Service Manual page 250

FUEL SYSTEM
Note: To prevent "rounding" the fuel line nuts
always use a "line" or "flare nut" wrench.
When loosening the fuel line nuts,
always hold the fuel injection pump
delivery valves with a "back up" wrench
to prevent loosening.
• Loosen the fuel line nuts at the fuel injectors
and then at the fuel injection pump.
CAUTION
Remove or install the high-pressure fuel
injection lines as an assembly whenever
possible. Disassembling the
high-pressure fuel injection lines from
the retainers or bending any of the fuel
lines will make it difficult to reinstall the
fuel lines.
• Finish loosening all the fuel line nuts and
remove the high-pressure fuel lines as an
assembly being careful not to bend any of the
fuel lines. Be sure to protect the fuel system
from contamination by covering all open
connections.
3. Remove the return fuel hoses (Figure 7-45, (1))
from one side of each fuel injector.
4. Remove the bolts and washers that secure the
fuel injector retainers (Figure 7-45, (2)) to the
cylinder head.
5. Remove the fuel injector retainer.
7-32
(1)
(2)
0000047en
6. Remove the fuel injector.
Note: The fuel injectors can usually be
removed by manually pulling them out of
the fuel injector wells. If the fuel injectors
cannot be manually removed, use the
fuel injector removal tool, Yanmar Part
No. 129470-92305, and a slide-hammer
puller (Figure 7-46).
• Attach a slide-hammer puller to the fuel injector
removal tool using a 3/8-16 puller rod.
Fuel Injectors
(3)
(4)
Figure 7-45
TNV DI Service Manual
0002092A