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Visual inspection of turbocharger
Only proceed when the engine is not turning over. Visually check that
the turbine and compressor impellers and the relative inlet and outlet
ducts are not obstructed or damaged, otherwise replace them.
Injector calibration
The injectors require periodic cleaning and calibration of the exact
injection pressure, by adding or replacing the shim washers inserted
under the spring; check the injection pressure by using a hand
operated pump equipped with a pressure gauge which, operated by
the lever, enables the injector calibration pressure to be obtained and
which is displayed on the pump pressure gauge at the moment in
which diesel delivery occurs. During the test it is also possible to note
whether the direction of the jet is correct and whether the injectors
show any signs of fuel leakage. Clean the injectors using a metal brush
to remove the carbon deposits from the nozzle tips.
Adjust valve/rocker arm clearance
The adjustment of the clearance between the rocker arms and the
intake and exhaust valve control rods must be strictly carried out using
an Allen wrench (1), box-end wrench (3) and a feeler gauge (2).
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