Toyota 1C Repair Manual page 146

FUEL SYSTEM - Injection Pump
FU-47 ·
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'-- P,-u _m_p_rpm_-::.. _____
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Boost
Pressure - -
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of
/ :.:':;: ~ons•og timer
End po!nl of lhe
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_y
k!Jo
S_., _ ___ _ Ma~
Side Adjustmg lever Posit">n Speed SideFuou 1
15 . INSPECT BOOST COMPENSATOR CHA RACTERISTIC
TENDENCY {CV)
(a)
Apply
0.27
kg/cm2
(3.8
psi.
26 kPa)
of pressure to
the boost compensator .
(b) Measure the injection vo lume.
Pump rpm
I
No. of measuring
strokes
Injection volume
cc lcu
inJ
1,500
I
200
9.4 - 10.3 (0.57 - 0.631
16. CHECK HYSTERESIS {CV)
Compare the injection volume when the boost compensa-
tor pressure is lowered from
0.48
to
0.27
and
0.14
to
0
kg /cm• and, conversely. when it Is raised from zero.
NOTE : Make measurement s after moving the adjusting
lever between idle and maximum three times for each
lowering of the pressure.
Pomp Prusure
No. of
lnjedjon
Hyst-
kg/cm
1
lpsi, kPa)
measuring
'VOiume
oc:
lc:u
lnJ
,pm
stroli.es
cc icu
In.)
0.48
10.1 - 10.S
16.8. 47)
(0,82 - 0 .64)
-
0.27
9.4 - 10.3
l us thin
13.8. 26)
10 .s 7 - 0 .631
0 .3 10 .02)
1,500
200
0. 14
8 ,4 - 9.2
12.0, 141
I0.5 1 - 0 .561 -
6.9 - 7.6
0
l0.42 - 0.461
If not within st anda rd value. check each sliding part of
the
boost compensa t or and check whether or not there is any
oil.
17 . ADJUST LOAO SENS ING TIMER
(a) Adjust the starting and end points of the load sensing
timer with the governor shaft.
(bl Measure the injec tion volume .
Adjusting
Pump rpm
No. of
lever position
measuring strokes
Maximum
1,800 200
speed side