Isuzu NHR 4J Series Workshop Manual page 313

6C - 54 ENGINE FUEL
Engine ; 4JB1TC
Injection pump identification No. ; 104746-6601
Injection volume adjustment
Timer adjustment
Adjustment specification of injection
volume
Average
Pump
injection
rotation
quantity
(rpm)
(mm
500 60.5±1.0
800 67.4±1.0
800 76.8±1.0
1000 (83.8±6.5)
1250 (91.5±6.5)
1700 (105.7±6.5)
2075 34.0±3.0
375 13.9±2.0
100 60
040LX001.tif
Adjustment specification of timer and
pump case pressure
Pump
rotation
stroke (mm)
(rpm)
1020 Below 0.5
1350
1500
1800
040LX002.tif
Potentiometer adjustment
Pump Out-put
speed voltage
(r/min) (V)
1080 3.56±0.03
375 (0.93±0.45)
F06LW004.tif
Boost
Uneven
pressure
amplitude
(kPa
3
(mm /ST)
3 2
/ST) (kg/cm ))
5.0 0
5.5 52.0 (0.531)
6.0 80.0 (0.821)
80.0 (0.821)
80.0 (0.821)
80.0 (0.821)
7.0 80.0 (0.821)
2.0 0
+40
0
− 0
Timer
At pressure
piston
of pump
2
(MPa (kg/cm ))
1.8±0.2 471±29 (4.8±0.3)
(3.0±0.4)
+ 0.4
4.5
− 0.3
Average Boost
injection Pressure
quantity kPa
3 2
(mm /st) (kg/cm )
27.5±2.0 0
13.9±2.0 0
Oil
temperature Remarks
(°C)
48±2 Standard
50±2 Standard
50±2 Standard
50±2
50±2
50±2
52±2 Standard
48±2 Standard
48±2
Boost
Pressure
Remarks
kPa
2
(kg/cm )
80.0 (0.82)
80.0 (0.82) Standard
80.0 (0.82)
80.0 (0.82)
Remarks
Standard
Standard