Isuzu engine 4j series. Service manual - part 75

6C - 44  ENGINE FUEL

IDENTIFICATION PLATE AND NUMBER

Use the data following the injection pump identification number
to adjust the injection volume.

F06LV002.tif

F06LV001.tif

F06LW002.tif

ENGINE FUEL  6C - 45

INJECTION VOLUME AND GOVERNOR PERFORMANCE DIAGRAM

Adjustment specification of injection
volume

Pump

rotation

rpm

Average
injection

quantity

mm

3

/ST

Uneven

amplitude

mm

3

/ST

Oil

temperature

°C

Remarks

500

(38.6)

48±2

700

34.9±2.5

50±2

1000

42.1±1.0

4.0

50±2

Standard

1450

44.5±2.5

50±2

1800

47.6±3.0

60±2

2100

12.9±3.0

4.0

52±2

390

6.7±3.0

2.0

48±2

100

60 - 100

48±2

Engine ; 4JB1
Injection pump assembly No. ;  8943616830 (104741-6410)

8943616850 (104741-6430)

Adjustment specification of timer and
pump case pressure

Timer piston

stroke mm

Air pressure

of pump

kPa (kg/cm

2

)

Solenoid timer

Solenoid timer

Pump

rotation

rpm

ON

OFF

ON

OFF

Standard

700

Over 0.5

—

—

—

1300

—

1.4±0.4

—

—

1600

—

3.9±2

—

490±20

(5.0±0.2)

Standard

1950

—

  7.0

—

—

Adjustment specification of aneroid
compensator

Pump

rotation

rpm

Altitude

m

Air

pressure

difference

kPa

(mmHg)

Amount of

reduction

mm

3

/ST

Rate of

reduction

%

0

0

0

0

(500)

-5.9±3.3

(-44±3)

Inflation

point

Inflation

point

1000

2000

-21.9

(-164)

-4.6±1

-11±3

6C-44-3.tif

6C-44-1.tif

6C-44-2.tif

+

 0.4

−

 0.3

6C - 46  ENGINE FUEL

+

 0.4

−

 0.3

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

Standard

700

Over 0.5

—

—

—

1300

—

1.4±0.4

—

—

1600

—

3.9±2

—

0.49±0.02

(5.0±0.2)

Standard

1950

—

  7.0

—

—

Adjustment specification of injection
volume

Pump

rotation

(rpm)

Average
injection

quantity

(mm

3

/ST)

Uneven

amplitude
(mm

3

/ST)

Oil

temperature

(°C)

Remarks

500

(38.6)

48±2

700

34.9±2.5

50±2

1000

42.1±1.0

4.0

50±2

Standard

1450

44.5±2.5

50±2

1800

47.6±3.0

50±2

2100

12.9±3.0

4.0

52±2

390

6.7±2.0

2.0

48±2

100

60 - 100

48±2

Engine ; 4JB1
Injection pump identification No. ; 104746-1230, 1240, 1250, 1260, 1280, 1290, 1370

Injection volume adjustment

Adjustment specification of aneroid
compensator (For 104746-1230,14746-
1280)

Pump

rotation

(rpm)

Altitude

(m)

Air pressure

difference

kPa

(mmHg)

Amount of

reduction

(mm

3

/ST)

Rate of

reduction

(%)

0

0

0

0

(500)

-5.9±3.3

(-44±25)

Inflation

point

Inflation

point

1000

2000

-21.9

(-164)

-4.6±1

-11±3

F06LV004.tif

F06LV019.tif

F06LV020.tif

Timer adjustment

ENGINE FUEL  6C - 47

6C-46-3.tif

Adjustment specification of injection
volume

Pump

rotation

rpm

Average
injection

quantity

mm

3

/ST

Uneven

amplitude

mm

3

/ST

Remarks

100

78±12

350

64±6.0

500

52±3.0

720

55.9±3.4

1000

62.6±1.0

4.0

1250

60.9±3.5

1700

574±3.5

4.0

2100

13±5.0

2250

Below 5.0

360

15.9±3.0

2.5

550

Below 3.0

Engine ; 4JG2 (For ’91/542B) (Belt drive)
Injection pump assembly No. ; 897138-8422 (196000-1042)

F06LV005.tif

F06LV004.tif

F06LV007.tif

F06LV006.tif

F06LV008.tif