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TM 5-4320-305-24
3-16.
REPAIR TURBOCHARGER (Continued)
WARNING
Dry cleaning solvent P-D-680 (safety or Stoddard's Solvent) is potentially
dangerous. Avoid repeated and prolonged breathing of vapors and skin contact
with the liquid. Do not use near open flame, arcing equipment, or other ignition
sources. Always wear eye protection and protective clothing. The flash point of
P-D-680 is 100° to 138°F (38° to 59°C).
Death or serious injury could occur if compressed air is directed against the skin.
Do not use compressed air for cleaning or drying unless the pressure is/has been
reduced to 30 psi (2. 11 kgcm2 ) or less. When working with compressed air
always use chip guards, eye protection, and other personal protective equipment.
2
Soak all parts in dry cleaning solvent.
3
After soaking, use a stiff-bristle brush and remove all dirt particles.
4
Thoroughly clean deposits from compressor wheel and turbine wheel blades.
5
Dry all parts thoroughly with compressed air.
6
Clean bearing housing internal cavities and oil passages with compressed air. Be sure oil lines are
thoroughly clean according to paragraph 2-33.
INSPECTION/REPAIR:
1
Inspect all parts for corrosion, deterioration, signs of rubbing, and damage. Check for nicked, crossed, or stripped
threads. Inspect casings for cracks, foreign particles, and scoring. Burnish minor surface damage with crocus cloth
or emery cloth. Remove sharp edges caused by wear. Replace any severely damaged components.
2
Check turbine housing, shaft and turbine wheel assembly, and compressor wheel for damage from rubbing or
foreign material. Check that turbine wheel blades are not warped or defective. Check that compressor wheel bore
is not galled. Replace severely damaged components.
3
Inspect shaft of shaft and turbine wheel assembly for scoring, scratches, or bearing seizure. Check shaft for true
run. The maximum tolerance as measured 0. 7874 inch (20 mm) from threaded end is 0. 00028 inch (0. 007
mm). Replace severely damaged shaft and turbine wheel assembly.
3-76
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