KiSC issued 09, 2007 A
<:
'.?
,
Control
rack
position
(
*
1
)
Speed
(min
-
1
(rpm))
Amount
o-f
inj
-ction
(rnm
3
/st)
Allowance
(mm
3
)(
*3)
"
_,
"
0
Checking Fuel-Tightness of Fuel Injection
Pump Plunger
1)
)
Attach a pressu re ga uge to the pu mp.
2)
Rotate th e f
l
ywheel
to
i
ncrease the pressu re to 58.8 MPa. (600
kgf /cm
2
8532
l
b./sq.i n.)
.
3)
Al ign the pl u nger wi th the top dead center.
4)
Measu re the ti me needed to decrease the
i
n itial pressu re
f rom 58.8 MPa. to 49.0 MPa. (600 kgf /cm
2
to 500 kgf
I
cm
2
,
8532
l
b./sq.i n. to 7110
l
b./sq.i n.)
5)
I
f
the measu rement is not accepta ble, repl ace the pu m p
element.
I
n th is case, ask a repai
r
shop to do the repl ace-
ment. Be su re to give them adjustment reference data on
the
f
uel
i
njection pum p. (Shown
l
eft)
(A) Profile of fuel pump cam
9
sct
C
Ol 9 F036
•
Adjustment reference data of fuel injection pump
•
Test Conditions
Nozzle
. . . . . . . . . . . . . . . . . . . . . . . . .
DN12SD12
Opening pressure
. . . . . . . . . .
13.73 MPa (140 kgf/cm
2
)
Pipe
. . . . . . . . . . . . . . . .
6 mm in diameter x 2 mm in
diameter x 600 mm
Fuel feed pressure
. . . . . . . . . . .
19.6 kPa ( 0.2 kgf/cm
2
)
Cam profile
. . . . . . .
•
.
•
. . .
•
.
.
. . . .
See Fig. below.
Prestroke
. . . . . . . . . . . . . . . . . . . . .
2.2
±
0.05 mm
Test fuel
. . . . . . . . . . . . .
•
. . .
•
.
Diesel Fuel No.2-D
•
A
d
justment
of
i
n
jection
9
1400
23 ±
1 .5
± 1.5 or less
8
1400
18.5 7.5
± 3.8 or less
7
1400
13.5
±
7.5
± 3.8 or less
0 to 3.5
1550
0 ( *2)
*1 Travel distance from non-injecting point of control rack
*2 Zero opening pressure and no injection
*3 Allowance on the basis of standard cylinder
57
0
Checking Fuel-Tightness of Delivery Valve of
Fuel Injection Pump
1)
)
Attach a pressu re ga uge to t he pu m p.
2)
Rotate th e flywheel to
i
ncrease the pressu re to 9.8 MPa.
(100 kgf /cm
2
,
1422
l
b./sq.i n.) .
3)
A
l
ign the pl u nger w ith the bottom dead center.
4)
Measu re the t
i
me needed to decrease the
i
n
itia
l
pressu re
from 9.8
M
Pa. to 490.3 kPa.
(
100 kgf /cm
2
to 5 kgf /cm
2
1422
l
b./sq.i n. to 71.1
l
b./sq.i n.)
5)
If
the measu rement is not accepta ble, replace the del ivery
va
l
ve.
C
O J
9 F034
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