Isuzu NPR 4J Series User Manual

4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 93
2) With the edge of the oil seal attached securely to the
crankshaft, tighten it with the center bolt until the
sleeve hits securely against the reference plane at the
front end of the crankshaft.
3) Remove the sleeve.
4) After pressing in the oil seal, check the measurement
of the oil seal.
Standard mm (in)
0.6 - 1.2 (0.024 - 0.047)
8. Piston and Connecting Rod Assembly
7. Piston Cooling Oil Pipe
Above works refer to “PISTON” Section in this manual.
6. Oil Pump Assembly
5. Oil Pan Assembly
Above works refer to “OIL PUMP AND OIL PAN” Section
in this manual.
4a. Timing Belt (Belt Drive Model)
12) Camshaft timing pulley
Above works refer to “CAMSHAFT AND TAPPET”
Section in this manual.
11) Injection pump
10) Injection pump timing pulley
Above works refer to “CYLINDER BLOCK
ASSEMBLY” Section in this manual.
9) Crankshaft timing pulley
• Use the crankshaft timing pulley installer to install the
timing pulley.
• The timing pulley flange must be facing the cylinder
body.
Crankshaft Timing Pulley Installer: 5-8522-0020-0
8) Crankshaft timing pulley center
• Install the crankshaft pulley center.
• Use the fixing wrench to prevent the crankshaft from
turning.
Fixing Wrench: 5-8840-0161-0
• Tighten the crankshaft pulley center bolt to the
specified torque.
Crankshaft Pulley Center Bolt Torque N∙m (kg∙m/lb∙ft)
206 (21/152)
7) Timing belt
6) Flange: camshaft pulley
5) Flange: injection pump pulley
4) Timing pulley lower cover
3) Timing pulley upper cover
6A1-93-1.tif
6A1-93-2.tif

Isuzu NPR 4J Series Specifications

General

Brand	Isuzu
Model	NPR 4J Series
Category	Engine
Language	English