Isuzu NPR 4J Series - Page 312

ENGINE FUEL 6C - 53
+
40
−
0
+
0.4
−
0.3
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 (33.9±4.0) — 0 48±2
750 43.8±1.0 3.5 33.3 (0.34) 50±2 Standard
1150 (57.6±3.5) — 72.0 (0.73) 50±2
1250 58.5±1.0 5.0 72.0 (0.73) 50±2 Standard
1250 (51.6±3.5) — 0 50±2
1900 (62.5±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
Engine ; 4JB1T
Injection pump identification No. ; 104746-6670
Injection volume adjustment
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