Isuzu NPR 4J Series User Manual

GENERAL ENGINE MECHANICAL 6A – 41
6) Timing Belt
NOTE:
• When the timing belt is removed, be sure to replace it
with a new one.
• The tension of the timing belt may be affected by the
changes in temperature. Be sure to install it while the
engine cold.
• When the timing belt is bent forcibly, the cord may got
snapped, thus resulting in the reduced strength. Do
not bend it unnecessarily.
!
Check that the stopper bolts are properly installed to
the camshaft timing pulley and the injection pump
timing pulley.
"
Check that the timing pulley housing mark and the
crankshaft timing pulley mark are aligned.
The No. 1 cylinder should be at TDC on the
compression stroke.
Rotate the crankshaft damper pulley clockwise to align
the marks.
#
Install the timing belt to the crankshaft timing pulley
!
,
the camshaft timing pulley
"
, the tensioner idler
#
,
and the injection timing pulley
$
.
Follow the numerical order.
$
Install the timing belt tensioner
%
to the timing pulley
housing.
%
Temporarily tighten the tensioner bolt.
The tensioner should move freely
NOTE:
The timing belt is easily damaged. Be careful.
NOTE:
After completion of the installation of the timing belt,
check to see if the alignment mark of the crankshaft
timing pulley is in line with the alignment mark
provided on the housing.
• When the alignment marks are not in line with each
other, set them together and reinstall the timing belt.
&
Set the tensioner adjusting lever to the timing pulley
housing.
'
Remove the stopper bolts from the camshaft timing
pulley and the injection pump timing pulley.
(
Attach the spring balancer.
)
Adjust the timing belt tension by pulling straight down
on the spring balancer with the specified force.
Tension Adjusting Lever Force N (kg/lb)
98 - 118 (10 - 12/22 - 26)
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6A-42-1.tif

Isuzu NPR 4J Series Specifications

General

Brand	Isuzu
Model	NPR 4J Series
Category	Engine
Language	English