Inspection Of Parts For Re-Use; Bearing Housing; Compressor Wheel; Shaft And Wheel - KIRLOSKAR DV Series O & M Manual

15. Remove inner circlips.
Cleaning is generally done by soaking the components in commercially available non-caustic solvent,
wiping, brushing or scraping any residue off and then blow drying with clean compressed air. However,
vapour blasting is a good alternative if available, providing the vapour blasting equipment manufacturers
instructions are carefully followed and critical surfaces are appropriately protected (see details below).
If parts are to be stored for any length of time after cleaning then they should be stored in clean, dry
plastic bags and the surfaces of all potentially rusting parts should be oiled prior to storage.
1.

Bearing Housing

a. Scrape, brush or wipe as appropriate, to remove accumulations of residue from the exterior
surfaces.
b. Immerse briefly in safety solvent to remove any oily residue.
c. Blow dry with compressed air. N.B. If vapour blasting is used mask the bore with corks or
rubber stoppers.
2.

Compressor Wheel

a. Immerse briefly in safety solvent to remove any traces of oily residue.
b. Blow dry with compressed air. N.B. If vapour blasting then take care to mask the bore with
corks or rubber stoppers.
3.

Shaft and Wheel

a. Immerse briefly in safety solvent to remove any traces of oily residue.
b. Blow dry with compressed air. N.B. If vapour blasting then take care to mask the entire
shaft section with either appropriately sized rubber hose or adhesive backed cloth tape.
c. After cleaning mount the shaft and wheel between centres in a lathe and lightly polish the
journal section of the shaft at 300 to 600 rpm with 400 grit abrasive paper and clean oil.
NOTE: If the shaft and wheel shows any evidence of imbalance (bearing material smeared
on only one side of the shaft) - do not attempt to reuse.
d. After polishing re-immerse briefly in safety solvent and blow dry with compressed air.
4. Compressor cover
a. Scrape, brush or wipe, as appropriate, to remove accumulations of residue from the exterior
surfaces.
b. Immerse briefly in safety solvent to remove any oily residue.
c. Blow dry with compressed air. N.B.No masking necessary if vapour blasting.
5. Turbine Housing and Backplate
a. Blast with coarse sand or steel grit to obtain total interior and exterior cleanliness.
b. Immerse briefly in safety solvent to remove residues.
c. Blow dry with compressed air.
6. V Clamps
a. Immerse in safety solvent agitating moderately until foreign material deposits have been
softened or dissolved.
b. Blow dry with compressed air.
7. Small Internal Parts
a. Immerse briefly in clean safety solvent to remove oily residues.
b. Wipe dry with a clean cloth.

INSPECTION OF PARTS FOR RE-USE

It is recommended that all visual and dimensional checking of parts for re-use be done after parts have
been cleaned as described above. Critical dimensions mentioned below are given in the latest issue of the
'Hundred Series Service Limits and Torque Values' Data Sheet.
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