Renault Magnum engine. Manual — part 103
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Engine equipped with "Optibrake +"
Check the clearance between the valve yoke and the exhaust rocker arm piston. Turn the piston to ensure that it is properly seated in its housing.
Use a feeler gauge corresponding to the recommended clearance.
See pages .
In the event of rocker arm play or sticking, make the check with a thicker or thinner feeler gauge in order to determine the thickness of the new adjusting
shim.
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In the event of incorrect clearances.
Remove bolt.
Remove adjusting shim .
Hold the caliper in place when unbolting.
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Note down the thickness
X engraved on adjusting shim.
Determine the thickness of the new adjustment shim, in order to obtain the recommended clearance.
See pages .
You can superimpose a maximum of 2 adjusting shims, provided that they have the same thickness. Adjusting shims are available with thicknesses of
0.05 by0.05 mm.
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Fit shim.
Fit bolt.
Tighten to torque.
See pages .
Hold the caliper in place when tightening.
Again check the clearance between the valve yoke and the arm piston.
For adjusting the brake rocker arm, leave the feeler gauge in place.
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