Yanmar 3TNV88F - Test and Adjustment Specifications

FUEL SYSTEM
7-6
3TNV88F Service Manual
Fuel System Specifications
Test and Adjustment Specifications
Note:
• Fuel injection pressure of a new fuel injector is reduced approximately 72.5 PSI (0.5 MPa; 5.0 kgf/cm
2
)
after about 5 hours of operation due to the initial break in of the engine. When adjusting a new fuel
injector or after it has been disassembled for service, adjust the fuel injector 72.5 PSI (0.5 MPa; 5.0
kgf/cm
2
) higher than the above standard.
• All fuel injectors have a three character identification mark (Figure 7-2 (1)). The first character starts with
“V”, “W”, “R” or “S”.
Figure 7-2
Note: Fuel injector identification is critical as each engine has a unique fuel injection pressure. The fuel
nozzle is specifically matched to the fuel injector by engine model and/or engine speed.
Injector ID mark* Fuel injector pressure Fuel injection timing
W
2843 - 2988 PSI
(19.6 - 20.6 MPa, 200 - 210 kgf/cm
2
)
See Checking and Adjusting Fuel Injection Timing
on page 7-20
V
3133 - 3278 PSI
(21.6 - 22.6 MPa, 220 - 230 kgf/cm
2
)
S
2702 - 2845 PSI
(18.6 - 19.6 MPa, 190 - 200 kgf/cm
2
)
R
3058 - 3200 PSI
(21.1 - 22.1 MPa, 215 - 225 kgf/cm
2
)
K0004105
1
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