Isuzu NPR 4J Series User Manual

00 – 48 SERVICE INFORMATION
7. Rotate the crankshaft to bring the piston in the No. 1
cylinder to a point 30 - 40° BTDC.
8. Set the timing gauge needle to zero.
9. Move the crankshaft pulley slightly in both directions
to check that the gauge indication is stable.
10. Turn the crankshaft clockwise and read the gauge
indication when the crankshaft pulley timing mark is
aligned with the pointer.
mm (in)
4JB1 BTDC 14°
4JB1T BTDC 11°
4JB1TC BTDC 4°
4JG2 ATDC 2°
Standard Reading mm (in)
0.5 (0.02)
If the injection timing is outside the specified range,
continue with the following steps.
11. Loosen the injection pump fixing nuts and bracket
bolts.
12. Adjust the injection pump setting angle.
When large than
standard value
When smaller than
standard value
Gear drive A B
A : Move the injection pump toward the engine.
B : Move the injection pump away from the engine.
Tighten the pump fixing nut, adjust bolt and pump
distributor head plug to the specified torque.
Pump Fixing Bolt N∙m (kg∙m/lb∙ft)
24 (2.4/17)
Adjust Bolt N∙m (kg∙m/lb∙ft)
19 (1.9/14)
Injection Pump
Distributor Head Plug N∙m (kg∙m/lb∙ft)
17 (1.7/12)
CAUTION
• When installing the distributor head/plug, be sure
to use new copper washer.
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Isuzu NPR 4J Series Specifications

General

Brand	Isuzu
Model	NPR 4J Series
Category	Engine
Language	English