Yanmar 4TNV94L Service Manual

FUEL SYSTEM
7-42
TNV DI Service Manual
Fuel Injectors
Installation of the Fuel Injectors
2-Valve Cylinder Head
1. Reinsert a new nozzle seat (Figure 7-59, (4))
and nozzle protector (Figure 7-59, (3)) in the
cylinder head for each injector.
2. Reinstall a O-ring on to each injector body.
3. Reinsert each fuel injector into the cylinder
head.
4. Reinstall the fuel injector retainers
(Figure 7-59, (2)) and torque the retaining bolts
to specification.
5. Reinstall the fuel return hoses
(Figure 7-59, (1)), one on each side of each
injector.
6. Reinstall the fuel high-pressure fuel line
assembly and tighten the nuts using a “line” or
“flare nut” wrench.
Figure 7-59
7. Prime the fuel system. See Priming the Fuel
System on page 4-15.
8. Operate the engine and check for fuel and
coolant leaks.
4-Valve Cylinder Head
1. Reinsert a new nozzle seat (Figure 7-60, (6))
and nozzle protector (Figure 7-60, (5)) in the
cylinder head for each injector.
2. Reinstall a O-ring on to each injector body.
3. Reinsert each fuel injector (Figure 7-60, (4))
into the cylinder head.
4. Reinstall the fuel injector retainers
(Figure 7-60, (3)) and torque the retaining bolts
(Figure 7-60, (2)) to specification.
5. Reinstall the fuel injector return line assembly
using new gaskets on each side of the injector
line screws.
6. Reinstall the fuel high-pressure fuel lines to
each injector and tighten the nuts using a “line”
or “flare nut” wrench.
Figure 7-60
7. Prime the fuel system. See Priming the Fuel
System on page 4-15.
8. Operate the engine and check for fuel and
coolant leaks.
0002092A
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
(5)
(6)
TNV_DI_SM_A4.book 42 ページ ２００７年１２月６日 木曜日 午前９時２３分

Yanmar 4TNV94L Specifications

General

Engine Model	4TNV94L
Number of Cylinders	4
Aspiration	Natural
Fuel System	Direct injection
Cooling System	Water-cooled
Bore x Stroke	94 mm x 110 mm
Lubrication System	Forced lubrication
Starting System	Electric
Rotation	Counterclockwise
Engine Type	4-cycle, water-cooled, direct injection diesel