S.4
FUEL
SYSTEM
92.4mm
STROKE
SERIES
WSM, 01093
Fuel tightness of
pump element
I
C112F059
Allowable
150
kgflcm?
limit
14.7
MPa,
2
133
psi
Fuel tightness
of
delivery valve
[Z]
INJECTION
NOZZLE
5
seconds
14.7- 13.7bPa
2133- 19OOtxi
Allowable
150- 140
k
f/Cm2
limit
I0087F082
(1)
Adjusting
Washer
0087F026
(1)
Injection Pump Pressure Tester
Fuel Tiahtness of Deliverv Valve
1.
Set
a
pressure tester to
the
fuel injection pump.
2.
Rotate
the
flywheel and raise the pressure to
155-
160 kglcm2.
3.
Now turn the flywheel back about half a turn (to
keep the plunger free).
Maintain
the flywheel
at
this
position and clock
the
time taken for the
pressure to drop from the 150 kglcm2 down to 140
kglcm2
4.
Measure
the
time needed to decrease
the
pressure
from
150
to
140
kgf/cm2
(14.7
to
13.7
MPa,
2133
to
1990 psi).
5.
If
the
measurement
is
less
than
allowable limit,
replace
the
delivery valve.
CAUTION
0
Check
the
nozzle injection pressure and condition
after confirming that there
is
nobody standing in
the
direction
the
fume goes. If
the
fume from the
nozzle directly contacts the human body,
cells
may be destroyed and blood poisoning may be
caused.
Nozzle Injection Pressure
1.
Set
the
injection nozzle to the 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, disassemble
the
injection nozzle,
and change adjusting washer
(1)
until
the
proper
injection pressure
is
obtained.
(Reference)
0
Pressure variation with
0.025
mm
(0.00098
in.)
difference of adjusting washer thickness.
Approx.
6
kgf/cm2
(588.6
kPa,
85.32
psi)
I
140
to
150
kgfkm2
13.73
to
14.71
MPa
1991 to2133
psi
Fuel
injection
pressure
I
S-107
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