Isuzu NHR 4J Series Workshop Manual page 305

6C - 46 ENGINE FUEL
Engine ; 4JB1
Injection pump identification No. ; 104746-1230, 1240, 1250, 1260, 1280, 1290, 1370
Injection volume adjustment
Timer adjustment
Adjustment specification of aneroid
compensator (For 104746-1230,14746-
1280)
Pump
Altitude
rotation
(m)
(rpm)
0
(500)
1000
2000
Air pressure
Amount of Rate of
difference
reduction reduction
kPa
3
(mm /ST) (%)
(mmHg)
0 0 0
-5.9±3.3 Inflation Inflation
(-44±25) point point
-21.9
-4.6±1 -11±3
(-164)
Adjustment specification of injection
volume
Average
Pump
injection
rotation
quantity
(rpm)
3
(mm
500 (38.6)
700 34.9±2.5
1000 42.1±1.0
1450 44.5±2.5
1800 47.6±3.0
2100 12.9±3.0
390 6.7±2.0
100 60 - 100
F06LV019.tif
Adjustment specification of timer and
pump case pressure
Pump
stroke (mm)
rotation
Solenoid timer
(rpm)
ON
700 Over 0.5
1300 —
1600 —
1950 —
F06LV020.tif
Uneven Oil
amplitude temperature
3
(mm /ST) (°C)
/ST)
48±2
50±2
4.0 50±2
50±2
50±2
4.0 52±2
2.0 48±2
48±2
Timer At pressure
piston of pump
2
(MPa (kg/cm ))
Solenoid timer
OFF ON OFF
— — —
1.4±0.4 — —
0.49±0.02
3.9±2 —
(5.0±0.2)
+ 0.4
7.0 — —
− 0.3
Remarks
Standard
Standard
Standard
F06LV004.tif