Volvo 2001 - Page 25

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 .