I
FUEL SYSTEM
-
Injection Pump
FU-39
15.
(2L-T)
CHECK HYSTERESIS
(Austria)
Compare the injection volume when the boost compensa-
tor pressure
is
lowered from 0.74 kg/cm2 (10.5 psi, 73 kPa)
to
0
kg/cm2
(0
psi, 0 kPa) and, conversely, when
it
is
raised
from zero.
(Others)
Compare the injection volume when the boost compensa-
tor pressure
is
lowered from 0.78 kg/crn2 (1 1.1 psi, 77 kPa)
to 0.14 kg/cm2
(2.0
psi,
14
kPa) and, conversely, when
it
is
raised from zero.
HINT:
Make measurements after moving the adjusting
lever between idle and maximum three times for each
lowering of the pressure.
Boost pressure
kg/cm2
(psi, kPa)
No. of
measuring
strokes
Injection volume
cc
(CU
in.)
Hysteresis
cc (cu in.)
the load sensing timer
End point of the
Austria
Others
load sensing timer
Idle Speed
,
Maximum
Side
Speed Side
Adjusting Lever Position
~~2317
FU0251
1,400
1,400
500
500
1,200
1,200
1,200
1,200
If not within standard value, check each sliding part of the
boost compensator and check whether or not there
is
any
oil.
16.
(2L-T
and
w/o
HAC)
ADJUST LOAD SENSING TIMER
0.74 (10.5, 73)
0.68 (9.6,66)
0.41 (5.9,40)
O
(0, 0)
0.74 (10.5,73)
0.63 (9.0, 62)
0.41(5.9,40)
0.14(2.0,14)
(a)
Using
a
5 mm hexagonal wrench, adjust the starting
and end points of the load sensing timer by turning
the governor shaft.
(b) Measure the injection volume.
2 00
200
I
Maximum speed side
I
1,200
1
200
1
13.84
-
14.36 (0.84
-
0.88)
13.94
-
14.26 (0.85
-
0.87)
14.60
-
15.40 (0.89
-
0.94)
10.80
-
11.60 (0.66
-
0.71
)
13.84
-
14.36 (0.84
-
0.88)
13.94
-
14.26 (0.85
-
0.87)
12.90
-
13.50 (0.79
-
0.82)
1 1.20
-
12.00 (0.68
-
0.73)
-
-
0.3 (0.02) or less
-
-
-
0.3 (0.02) or
less
-
No. of
measuring
strokes
Adjusting
lever position
Pump rpm
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