Isuzu engine 4j series. Manual — part 77
6C - 52 ENGINE FUEL
Timer adjustment
Adjustment specification of timer and
pump case pressure
Timer
piston
stroke (mm)
At pressure
of pump
(MPa (kg/cm
2
))
Solenoid timer
Solenoid timer
Pump
rotation
(rpm)
ON
OFF
ON
OFF
Boost
Pressure
kPa
(kg/cm
2
)
Remarks
750
Over 0.5
—
—
—
72.0 (0.73)
1600
—
1.8±0.4
—
—
72.0 (0.73)
1900
—
3.7±0.2
—
618
(6.3±0.2)
72.0 (0.73) Standard
2400
—
7.0
—
—
72.0 (0.73)
Adjustment specification of injection
volume
Pump
rotation
(rpm)
Average
injection
quantity
(mm
3
/ST)
Uneven
amplitude
(mm
3
/ST)
Boost
pressure
(kPa
(kg/cm
2
))
Oil
temperature
(°C)
Remarks
500
(37.0±4.0)
—
0
48±2
750
46.9±1.0
3.5
33.3 (0.34)
50±2
Standard
1150
(60.7±3.5)
—
72.0 (0.73)
50±2
1250
61.6±1.0
5.0
72.0 (0.73)
50±2
Standard
1250
(54.7±3.5)
—
0
50±2
1900
(65.6±4.0)
—
72.0 (0.73)
50±2
2100
24.8±3.0
4.5
72.0 (0.73)
52±2
Standard
375
9.0±2.0
2.0
0
48±2
Standard
100
60
—
0
48±2
+
40
−
0
+
0.4
−
0.3
Engine ; 4JB1T
Injection pump identification No. ; 104746-6311, 104746-6380
Injection volume adjustment
F06LW004.tif
F06LW001.tif
F06LW003.tif
ENGINE FUEL 6C - 53
+
40
−
0
+
0.4
−
0.3
Timer adjustment
Adjustment specification of timer and
pump case pressure
Timer
piston
stroke (mm)
At pressure
of pump
(MPa (kg/cm
2
))
Solenoid timer
Solenoid timer
Pump
rotation
(rpm)
ON
OFF
ON
OFF
Boost
Pressure
kPa
(kg/cm
2
)
Remarks
750
Over 0.5
—
—
—
72.0 (0.73)
1600
—
1.8±0.4
—
—
72.0 (0.73)
1900
—
3.7±0.2
—
618
(6.3±0.2)
72.0 (0.73) Standard
2400
—
7.0
—
—
72.0 (0.73)
Adjustment specification of injection
volume
Pump
rotation
(rpm)
Average
injection
quantity
(mm
3
/ST)
Uneven
amplitude
(mm
3
/ST)
Boost
pressure
(kPa
(kg/cm
2
))
Oil
temperature
(°C)
Remarks
500
(33.9±4.0)
—
0
48±2
750
43.8±1.0
3.5
33.3 (0.34)
50±2
Standard
1150
(57.6±3.5)
—
72.0 (0.73)
50±2
1250
58.5±1.0
5.0
72.0 (0.73)
50±2
Standard
1250
(51.6±3.5)
—
0
50±2
1900
(62.5±4.0)
—
72.0 (0.73)
50±2
2100
24.8±3.0
4.5
72.0 (0.73)
52±2
Standard
375
9.0±2.0
2.0
0
48±2
Standard
100
60
—
0
48±2
Engine ; 4JB1T
Injection pump identification No. ; 104746-6670
Injection volume adjustment
F06LW004.tif
F06LX014.tif
F06LW003.tif
6C - 54 ENGINE FUEL
Adjustment specification of injection
volume
Pump
rotation
(rpm)
Average
injection
quantity
(mm
3
/ST)
Uneven
amplitude
(mm
3
/ST)
Boost
pressure
(kPa
(kg/cm
2
))
Oil
temperature
(°C)
Remarks
500
60.5±1.0
5.0
0
48±2
Standard
800
67.4±1.0
5.5
52.0 (0.531)
50±2
Standard
800
76.8±1.0
6.0
80.0 (0.821)
50±2
Standard
1000
(83.8±6.5)
80.0 (0.821)
50±2
1250
(91.5±6.5)
80.0 (0.821)
50±2
1700
(105.7±6.5)
80.0 (0.821)
50±2
2075
34.0±3.0
7.0
80.0 (0.821)
52±2
Standard
375
13.9±2.0
2.0
0
48±2
Standard
100
60
0
48±2
Engine ; 4JB1TC
Injection pump identification No. ; 104746-6601
Injection volume adjustment
+
40
−
0
Adjustment specification of timer and
pump case pressure
Pump
rotation
(rpm)
Timer
piston
stroke (mm)
At pressure
of pump
(MPa (kg/cm
2
))
Boost
Pressure
kPa
(kg/cm
2
)
Remarks
1020
Below 0.5
80.0 (0.82)
1350
1.8±0.2
471±29 (4.8±0.3)
80.0 (0.82) Standard
1500
(3.0±0.4)
80.0 (0.82)
1800
4.5
80.0 (0.82)
Timer adjustment
Potentiometer adjustment
Pump
speed
(r/min)
Out-put
voltage
(V)
Average
injection
quantity
(mm
3
/st)
Boost
Pressure
kPa
(kg/cm
2
)
Remarks
1080
3.56±0.03
27.5±2.0
0
Standard
375
(0.93±0.45) 13.9±2.0
0
Standard
040LX001.tif
040LX002.tif
F06LW004.tif
+
0.4
−
0.3
ENGINE FUEL 6C - 55
FUEL TANK
REMOVAL
Preparation:
•
Disconnect battery ground cable.
•
Loosen fuel filler cap.
•
Drain fuel from drain plug.
•
After the drain fuel, tighten the drain plug to the
specified torque.
N∙m (Kg∙m/lb∙ft)
29 (3/22)
1. Evapo Fuel Hose
2. Fuel Feed Hose
3. Fuel Return Hose
•
Plug the hose to prevent fuel from getting spilt, and tie
it to the frame with the plugged end up.
4. Fuel Gauge Unit Connector
•
Remove the connector of the fuel gauge.
5. Band
•
Remove the nut of the fuel tank fixing band, and then
remove the band end on the frame side.
6C-54-1.tif
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