Extra Information
Remove
the
packing
ring
(12)
on
the
turbine
shaft
and
the
two
packing
rings
(13)
on
the
oil
deflector
.
Clean
the
parts
carefully
.
Measuring
and
Inspection
Turbine
Wheel
and
Shaft
Unfasten
the
four
screws
which
hold
the
compression
bearing
(8)
.
Using
a
small
copper
mandrel,
tap
out
the
compression
bearing
and
the
bushing
(9)
.
Then
remove
the
circlips
(10)
inside
the
bearing
housing
and
remove
the
two
bearings
(11)
.
Check
that
the
turbine
wheel
and
shaft
are
free
from
mechanical
damage
.
The
vanes
must
not
be
worn
or
out
of
shape
.
Do
not
try
to
realign
the
vanes
.
Damaged
parts
should
be
replaced
.
Place
the
shaft
on
two
supports,
which
should
be
under
the
bearing
recesses,
and
check
the
throw
at the
end
of
the
shaft
.
The
maximum
permissible
throw
is
0
.011
mm
.
Check
the
diameter
of
the
shaft
bearing
recesses
.
The
minimum
permissible
diameter
is
7
.98
mm
.
Check
the
width
of
the
shaft
piston
ring
groove
.
Maximum
permissible
width
is
1
.29
mm
.
Compressor
Housing,
Turbine
Housing
Check
that
the
housings
are
free
from
cracks
or
other
damage
caused
by
excessive
wear
and
tear
.
Damaged
parts
should
be
replaced
.
Heat
Shield
Check
that
the
heat
shield
is
free
from
damage
caused
by
wear
and
tear,
heat
or
corrosion,
and
replace
it
if
necessary
.
Bushing,
Oil
Deflector,
Compressor
Bearing
Check
that
the
parts are free
from
wear
and
tear
and
discolouration
.
Damaged
parts
should
be
replaced
even
if
the
amount
of
wear
and
tear
is
within
the permitted
tolerances
.
Bushing
Oil
Deflector
Bearings
Check
measurement
(A),
which
should
not
be
less
than
4
.07
mm
.
Check
measurements
(B)
and
(C)
.
(B)
should
not
be
more
than
1
.31
mm,
(C)
shouldnot
be
more
than
1
.11
mm
.
Compressor
Bearing
Check
the
width
of
the
bearing,
and
replace
it if
the
amount
of
wear
and
tear
is
in
excess
of
the
permitted
tolerance
.
Minimum
permissible
width
is
3
.98
mm
.
Check
the
bearings
for
abnormal
wear
and
tear or
discolouration,
and
replacethem
where
necessary.Check
the
internal
and
external
diameters
of
all
bearings
.
The
external
diameter
should
not
be
less
than
12
.31
mm,
the
internal
diameter
should
not
be
more
than
8.04
mm
.