SERVICE MANUAL
d.
Carefully expand and remove the piston
ring (Fig. 7) from the turbine wheel and
shaft.
INSPECTION
Before cleaning, inspect all the components for
signs of rubbing or other defects which might not be
evident after cleaning.
Submerge and soak all parts in a good metal
cleaner. The cleaning solution should be agitated to do a
satisfactory job, but special care should be taken to
insure the parts do not strike each other.
Never use a caustic solution for cleaning,
as this will permanently damage certain parts.
Use only a soft brush, plastic blade scraper or
compressed air jet to remove deposits. Never use a wire
brush or steel blade scraper for this purpose.
Be sure all wheel blades are thoroughly
cleaned, as any deposits left on the blades will
affect balance.
Clean all internal cavities of the center housing
thoroughly with compressed air.
Check both wheels of the rotor assembly for
damaged or distorted vanes and for possible contact with
their respective housings and air inlet. The spacing
between the vanes and the contour must be uniform.
Check for cracked, bent or damaged blades. Replace if
necessary.
Do not attempt to straighten blades.
Inspect the turbine housing for cracks or
excessive scoring in the outlet contour. Inspect the
compressor housing for damage.
On the DT-466 turbocharger, inspect the thrust
washer and collar for wear or damage. Inspect the thrust
spring in the back plate for wear or damage. This spring
need not be removed unless damage is evident.
TURBINE WHEEL AND SHAFT
Inspect the bearing surfaces for excessive
scratches and wear. If the shaft is only slightly
scratched, it may be reused. Never grind or polish the
shaft, as this will affect balance.
Inspect piston ring groove walls for scoring.
Minor scratches are acceptable.
Check carefully for cracked, bent or damaged
turbine blades.
Do not attempt to straighten blades.
BEARINGS
Inspect for scratches or worn surfaces. Replace
bearing if tin plate is worn off.
CENTER HOUSING
Inspect for worn or scored surfaces in bearing
bores.
CTS-4104
PRINTED IN UNITED STATES OF AMERICA
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