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Isuzu NPR 4J Series - Timing Gear (4 JB1, 4 JB1 TC, 4 JG2 Gear Type) Installation

Isuzu NPR 4J Series
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6A1 – 26 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE
INSTALLATION
14 Crankshaft Gear
1) Install the crankshaft gear.
2) Use the crankshaft gear installer
!
to install the
crankshaft gear
"
.
The crankshaft gear timing mark ("X-X") must be
facing outward.
Crankshaft Gear Installer: 9-8522-0020-0
13. Camshaft Timing Gear
1) Install the thrust plate to the cylinder body.
2) Tighten the thrust plate bolts to the specified torque.
Nm (kgm/lbft)
18 (1.8/13)
3) Install the camshaft timing gear to the camshaft.
The timing gear mark ("Y-Y") must be facing outward.
4) Tighten the timing gear to the specified torque.
Nm (kgm/lbft)
64 (6.5/47)
12. Injection Pump
1) Install the O-ring !
to the injection pump flange
"
.
2) Install the injection pump to the timing gear case.
Align the idler gear "B"
#
"V-V" mark with the injection
pump timing gear
$
"V" mark.
3) Temporarily tighten the six injection pump nuts
%
.
The injection pump nuts will be finally tightened after
the injection pump rear bracket bolts.
6A1-26-1.tif
6A1-26-2.tif
6A1-27-2.tif
6A1-27-3.tif

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