Isuzu NPR 4J Series - Page 313

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