Toyota 1HD-FT Repair Manual page 178

ENGINE - FUEL SYSTEM
EG-165
16. CHECK HYSTERESIS
(0)
w/o
BAGS:
Compare the injection volume when the boost com-
pensator pressure is lowered from 79 kPa (0.81 kgfj
em'.
11.5
psi) to
0
kPa (0 kgf/cm
2
,
0 psi) and. con-
versely. when it is raised from zero.
(b)
wi
BAGS:
Compare the injection volume when the boost com-
pensator pressure is lowered from 127 kPa (1.25 kgf/
em', 18.3 psi) to 0 kPa (O kgf/cm'. 0 psi) and. con-
versely, when it is raised from zero.
HINT: Make measurements after moving the adjusting
lever between idle and maximum 3 times for each
lowering of the pressure.
Item
Pump Boost pressure No. of meesuring Injection volume of Hysteresis
'pm
kPa Ikgf/cm 2 • psll
sltokes 8ach cylinder cc (eu in.) cc leu 1n.1
121.911.24, 17.7)
14.04 - 15.64 (0.86 - 0.951
-
7910.81. '1.51 12.56 - 14.16 (0.76 - 0.861
-
wI BACS 720
200
8.02 - 9.22 (0.49 - 0.56) 0.6 (0.10) or less 41.2 (0.42, 6.0)
0(0,0)
7.14 - 8.34 (0.44 - 0.511
-
79 (0.81. 11.5) 14.04 15.64(0.86 - 0.95l
-
40 (0.41, 5.8) 12.70 14.3010.77 - 0.87)
-
wlo
BACS 720 200
15.7 to.16, 2.3) 8.80 - 10.00 (0.54 - 0.611
0.6 10.10l or less
010,0) 8.02 - 9.22 (0.49 - 0.56)
-
....,
If not within standard value. check each sliding part of
the boost compensator and check whether or not
there is any oil.
Starting point 01
the load sensing timer
AdjUlLIting lever
No. of meesuring
Pump rpm
position
strokes
1.«0
M'llimum .pe.cl side 200
1.800
ADJUST LOAD SENSING TIMER
Using a 5 mm hexagon wrench, adjust the starting
and end points of the load sensing timer by turning
the governor shaft.
Set the adjusting lever to maximum position.
Apply 67.2 kPa (503.7 mmHg, 19.83 in.Hg) of vacuum
to the SICS actuator.
w/o
BAGS:
Apply 79 kPa (0.81 kgfjcm'. 11.5 psi) of pressure to
the boost compensator.
wi
BAGS:
Apply 121.9 kPa (1.24 kgfjcm
2
•
17.7 psi) of pressure
to the boost compensator.
Measure the injection volume.
(I)
17.
(0)
(d)
(e)
(b)
(e)
.....
-i
5mm
'--1
Hexagon
* _
Wrench
I
,
\ c
,,,
End point of the
loaytimer
Idle
S';_;;;~-=====~MM;;;allimum
Side Speed Side
:~~{
Ad/ustlng
lever
Position