Isuzu NPR 4J Series User Manual

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
(%)
0000
(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

Isuzu NPR 4J Series Specifications

General

Brand	Isuzu
Model	NPR 4J Series
Category	Engine
Language	English