Chapter 4 Intake and Exhaust System
4. Turbocharger
4LHA Series
4 - 6 Cleaning and Checking Procedures
4-6-1
Cleaning
(1)
Checking
before
cleaning
Before
cleaning,
visually
check
each
part
for any
trace
of seizure,
wear,
foreign
matter
or
carbon
deposits.
When
parts
are
disassembled
because of any
trouble,
carefully
check
for
identifying
the
cause of
trouble
at
this
stage.
<Major
checking
items>
Check
item
Position
to be checked
Carbon
deposits
1) Turbine side seal ring of turbine shaft © and turbine wheel
backside
2) Mounting portions for bearing housing© and thermal insulation
plate
@
and
inner wall of bearing housing
Lubrication status
(wear, seizure,
discoloration,
etc.)
1) Journal of turbine shaftCD thrust bushing (2) and oil thrower @
2) Floating bearing® and thrust bearing@
3) Internal circumference of bearing
case
of bearing housing®
Oil
leakage
1) Inner wall of turbine housing®
2) Outer surface of bearing housing® and thermal insulation
plate ©mounting area
3) Turbine side seal ring © of turbine shaft ® and turbine wheel
backside
4) Inner wall of compressor housing®
5) Backside of compressor impeller ®
6) Surface of seal plate © and seal ring © inserting area
4-14