DE08TS Diesel Engines
Maintenance of Major Components
Periodical checking and servicing
Make it a rule to check the turbocharger assembly for
condition and contamination periodically.
1. Guide for checking the rotor for rotating con-
dition
The inspection of the rotor assembly for rotating
condition should be performed by the degree of
unusual sound. If a sound detecting bar is used,
install its tip on the turbocharger housing and
increase the engine revolutions slowly.
If a high-pitch sound is heard continuously, it
means that the rotor assembly is not normal.
In this case, as the metal bearing and rotor are like-
ly to be in abnormal conditions, the turbocharger
should be replaced or repaired.
b. Rotor radial play
c. If the measured axial and radial plays are
beyond the limit of wear, replace or repair the tur-
bocharger.
2. Guide for checking rotor end play
Disassemble the turbocharger from the engine,
then check the rotor axial play and radial play.
When disassembling the turbocharger, be sure to
plug the oil inlet and outlet ports with taps, etc.
a. Rotor axial play
93
EA8M4003
Magnet vise
Dial gauge
Turbine wheel room
Move the turbine
shaft to axial
direction
Standard : 0.117~0.20mm
Limit of wear : 0.24mm
EA8M4004
Dial gauge
Magnetic vise
Oil inlet
Oil outlet
Move the turbine shaft
in both directions
simultaneously
Radial play
Standard : 0.075~0.11mm
Limit of wear : 0.12mm
