Isuzu N-Series. Manual — part 622
6C-58 ENGINE FUEL
Adjustment specification of aneroid compensator
N6A3466E
Pump rotation
(rpm)
Altitude
(m)
Air pressure
difference
(kPa (mmHg))
Amount of reduction
(mm
3
/ST)
Rate of reduction
(%)
1000
0
0
0
0
(500)
-5.9
±3.3
(-44
±3)
Inflation point
Inflation point
2000
-21.9
(-164)
-4.6
±1
-11
±3
N6A3467E
ENGINE FUEL 6C-59
Engine ; 4JB1
Injection pump identification No. ; 104746-1230, 1240, 1250, 1260, 1280, 1290, 1370
Adjustment specification of injection volume
Adjustment specification of timer and pump case pressure
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
N6A3468E
Pump rotation
(rpm)
Timer piston stroke
(mm)
At pressure of pump
(MPa(kg/cm
2
))
Remarks
Solenoid timer
Solenoid timer
ON
OFF
ON
OFF
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
+ 0.4
-0.3
—
—
6C-60 ENGINE FUEL
Adjustment specification of aneroid compensator (For 104746-1230,14746- 1280)
N6A3469E
Pump rotation
(rpm)
Altitude
(m)
Air pressure
difference
(kPa (mmHg))
Amount of reduction
(mm
3
/ST)
Rate of reduction
(%)
1000
0
0
0
0
(500)
-5.9
±3.3
(-44
±25)
Inflation point
Inflation point
2000
-21.9
(-164)
-4.6
±1
-11
±3
N6A3470E
ENGINE FUEL 6C-61
Engine ; 4JG2 (For
′91/542B) (Belt drive)
Injection pump assembly No. ; 897138-8422 (196000-1042)
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
—
N6A3752E
N6A3753E
N6A3754E
N6A3755E
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