FUEL
SYSTEM
Fuel Injection Pressure
1.
Set the injection nozzle to a nozzle tester.
2.
Slowly move the tester handle to measure the pressure at
which
fuel begins jetting out from the nozzle.
3.
If
the measurement
is
not within the factory specifications,
replace the adjusting washer
(1)
in
the nozzle holder
to
adjust
it.
See the "Disassembling and Assembling" for nozzle holder.
13.73
to
14.71
MP.
Fuel
injection pressure Factory
spec.
140
to
150 kgffem'
1991102134 psi
(Reference)
• Pressure variation with
0.01
mm
(0.0004 in.) difference of
adjusting washer thickness.
Approx. 235
kPa (2.4 kgf/cm', 34 psi)
Nozzle Spraying Condition
1.
Set the injection nozzle to a nozzle tester, and check the
nozzle spraying condition.
2.
If
the spraying condition is defective, replace the nozzle piece.
Valve Seat Tightness
1.
Set the injection nozzle to a nozzle tester.
2.
Raise the fuel pressure, and keep at 12.75 MPa (130 kgf/cm',
1849 psi) for
10 seconds.
3.
If any fuel leak
is
found, replace the nozzle piece.
No fuel leak
at
Valve
seat tightness Factory
spec.
12.75
MP.
130 kgffem'
iB4~
psi
DISASSEMBLY
Nozzle Holder
1.
Sec.ure the nozzle retaining nut
(7)
with a vise.
2.
Remove the nozzle holder (1), and take out parts inside.
(When reassembling)
• Assemble the nozzle in clean fuel oil.
• Install
the push
rod
(4), noting its direction.
• After assembling the nozzle, be sure to adjust the fuel injection
pressure.
34.3
to
39.2
Nm
Nozzle holder 3.5
to
4.0 kgf·m
25.3
to
28.9 ft·lbs
19.6
to
24.5
N·m
Tightening torque Overflow pipe nut
2.0
to
2.5 kgf·m
14.5
to
18. I ft-Ibs
49.01068.6
N·m
Nozzle holder assembly
5.0
to
7.0 kgf·m
36.2
to
50.6 ft-Ibs
...,yo
WESTERBEKE
Engines & Generators
64
NOZZLE
HOLDER
(1)
GOOD
PRESSURE
TEST
DEFECTIVE
ADJUSTING
J....._-WASHER
(1)
RETAINING
NUT
(7)
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