Compressor Cover; Turbine Housing And Backplate; Flinger Sleeve - KIRLOSKAR DV Series O & M Manual

1. Bearing Housing
a. Inspect visually for evidence of cracks and fractures, pitting of gasket and other machined
surfaces, or distortion of the turbine end flange. Reject and replace if any of the above conditions
are severe.
b. Closely inspect the bearing bore visually for signs of damage or wear. The condition of the
removed bearings will be a good indicator of the bore condition. Refer to 'Service Limits Tables'
for maximum bore diameters. Reject and replace if bore condition is substandard.
c. Examine the turbine end seal bore for damage and replace bearing housing if wear is excessive.
N.B. Do not mistake the machined step and relief groove for a wear ridge.
2. Compressor Wheel
Inspect visually for evidence of bent, burred, nicked or eroded blades and for evidence of scuffing on
the back face. Dynamically balance the Compressor wheel and reject and replace if any damage has
affected wheel balance. Do not attempt to straighten bent blades.
3. Shaft and Wheel
a. Inspect visually for evidence of bent, burred, nicked or eroded blades and for evidence of scuffing
on the back face. Very minor damage is acceptable but reject and replace if the damage
appears sufficient to affect wheel balance. Do not attempt to straighten bent blades.
b. Inspect hub visually for evidence of smearing (as with high speed contact with the bearing
house bore) and for deterioration of the original rectangular configuration of the piston ring
groove. Reject and replace if the damage or wear is excessive.
c. Inspect journal diameter for wear. If this appears reusable the diameter should be checked with
a micrometer referring to the 'Service Limits Tables'.
d. Measure eccentricity between the large and small shaft diameters with a test dial indicator and
vee-block, referring to 'Service Limits Tables'.
e. Dynamically balance the shaft and wheel assembly, referring to the 'Service Limits Tables'. Do
not attempt to straighten a bent shaft.
4.

Compressor Cover

Inspect visually for evidence of contour damage (as from high speed wheel contact). Reject and
replace if damage is excessive. It is permissible to polish out minor surface damage in the contour.
5.

Turbine Housing and Backplate

Inspect visually for evidence of contour damage (as from high speed wheel contact) and for evidence
of overtemperature damage such as cracking, pitting, distortion or erosion. Reject and replace if
damage is excessive.
6. Insert
Inspect the insert bore for evidence of surface damage. If there is evidence of contact with rotating
components or if the piston ring wear has created a ridge the insert should be rejected and replaced.
7.

Flinger Sleeve

Inspect visually for evidence of surface damage from contact with stationary parts. If piston ring wear
has caused the ring groove to deteriorate from its original rectangular configuration reject and replace
the flinger sleeve.
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