TM 5-6115-400-35
(2) Turbine End and other parts.
(a) The
turbocharger
must
be
completely
disassembled
to
satisfactorily clean the turbine end.
(b) Submerge and soak all parts in an
approved metal cleaner.
The
cleaning solution should be agitated
to do a satisfactory job, but take
special care that parts are not
allowed to strike each other.
(c) Make sure that all impeller blades
are thoroughly cleaned. Deposits
left on the blades will affect
balance.
(d) Carefully
inspect
parts
to
specifications detailed in paragraph
f.
(e) Using compressed air, blow out all
oil passages/internal cavities in the
center housing and center housing
thrust plate assembly to make
certain they are open and clean.
Note.
Bend a small screwdriver at right
angles near its end so it can-be used
as a scraper. The oil outlet (fig. 34)
must be completely cleared of
carbon so the lubricating oil from the
bearing can escape without going
around the turbine wheel.
f. Turbocharger Inspection. If lack of lubrication
results in bearing seizure, or if impellers are damaged
by foreign objects passing through the turbine or
compressor, the resultant damage will be extensive and
require replacement of the rotating parts or of both
rotating parts and center housing. To properly assess
the extent of damage/wear, it is recommended that the
turbocharger be completely disassembled and all parts
Figure 34. Center housing - sectional view.
inspected at time of engine overhaul. In general, parts
must not show signs of damage, corrosion, or
Caution.
deterioration. Threads must not be nicked, stripped, or
Do not allow cleaning fluid to get
crossed. Burnish or polish out minor surface damage
into the bearing area. Never use
using silicone carbide abrasive cloth for aluminum parts
caustic cleaning solution as this will
and crocus cloth for steel parts. At time of-- repair or
damage certain parts. Use only a
overhaul, replace preformed packing, sealing ring, spiral
soft brush, plastic blade scraper and
lockring, and locking plates. Make certain all parts are
compressed air jet for removing
thoroughly clean and work bench area is clean and free
deposits of dirt. Never use a wire
of any abrasive material before proceeding with
brush or a steel blade scraper for
inspection of individual parts.
this purpose.
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