22
©
Scania CV AB 1997 01:01-02
Program 96
Axial clearance
1. Place the point of the dial gauge against the
end of the shaft.
2. Press the shaft forwards and backwards and
read the dial at the end positions. The differ-
ence between readings is axial clearance.
3. Repeat measurements three times.
Wear limits for Holset:
Radial clearance 0.329 -0.501 mm
Axial clearance
(after running-in) 0.038 -0.093 mm
If the turbocharger is not working
1. Check that there is no leakage nor any loose
objects in the line between the air cleaner and
turbocharger.
2. Check that there are no loose objects in the
exhaust manifold or intake manifold.
Change the charge air cooler.
3. Check that all valves are intact.
4. Check the lubrication oil return pipe from the
turbocharger for blockage or deformation.
5. Check the oil delivery pipe to the turbo-
charger for any blockage, deformation and
leakage under pressure.
6. Check the condition and part number of the
oil filter.
7. Check that the air filter is not blocked and
that there are no other reasons for the abnor-
mal increase of vacuum in the intake system.
8. Check that engine output is correct. Exces-
sively high output reduces the life of the
turbo.
9. Check that the exhaust brake, if fitted, works
correctly.
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