Isuzu NHR 4J Series Workshop Manual page 109

6A – 42 GENERAL ENGINE MECHANICAL
NOTE:
Timing belt tension must be adjusted.
Failure to adjust the timing belt tension will result in
timing belt damage.
*
Tighten the tension bolt.
Rotate the crankshaft 45 degrees counterclockwise.
11
NOTE:
Never rotate the crankshaft clockwise when adjusting
the timing belt.
6A-42-2.tif
Readjust the timing belt tension.
12
Refer to Step 9
This will remove any remaining timing belt slack.
Tighten the tensioner bolt to the specified torque.
13
Tensioner Bolt Torque
6A-42-3.tif
Tighten the tension adjusting lever nut and bolt.
14
NOTE:
If on-vehicle timing belt replacement is performed, the
crankshaft must not be allowed to turn.
If the crankshaft is allowed to turn, piston and valve
damage will result.
6A-42-4.tif
5) Flange: Camshaft Pulley
4) Flange: Injection Pump Pulley
• Install the timing pulley flange to the camshaft and
injection pump timing pulley.
• Tighten the timing pulley flange bolts to the specified
torque.
Timing Pulley Flange Bolt Torque
6A-43-1.tif
N∙m (kg∙m/lb∙ft)
76 (7.7/56)
N∙m (kg∙m/lb∙ft)
19 (1.9/14)