Isuzu NPR 4J Series - Page 311

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