Engine
SHOP MANUAL MT26-31 - 06.2005
Tier-3 710655-
Ch 1 page 71
Axial clearance
1.
Place the tip of the dial gauge 8014 against the end of the shaft.
2.
Press the shaft forwards and backwards and read the dial at
the end positions. The difference between readings is axial
clearance.
3.
Repeat measurements three times.
Wear limits for Holset:
Radial clearance 0.198-0.564 mm
Axial clearance
(after running in) 0.025-0.106 mm
If the turbocharger does not work:
1.
Check that there is no leakage or loose objects in the line
between the air cleaner and turbocharger.
2.
Check that there are no loose particles in the exhaust manifold
or intake manifold.
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 turbocharger 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 abnormal increase of vacuum in the intake
system.
8.
Check that engine output is correct. Excessively high output
reduces the life of the turbo.
Measuring axial clearance with
dial gauge 8014 and measuring
stand 8391
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