TM 10-4320-307-24
4-7
TURBOCHARGER (HC3-16) REPAIR (CONT).
6.
Place parts carefully in a clean basket to avoid damage or dirt.
7.
Inspect compressor wheel for the following:
a.
Signs of rubbing
b.
Damage from foreign material
c.
Signs of burning in bore area
d.
Signs of seals rubbing running surfaces.
8.
Inspect compressor housing for the following:
a.
Scoring due to contact with compressor wheel. If small scratches or chips are found they can be smoothed out
with crocus cloth.
b.
Cracks or distortion. Discard housing if cracked or distorted.
9.
Inspect turbine shaft and wheel assembly for the following:
a.
Signs of rubbing
b.
Vane edges worn to fine edge
c.
Scoring or scratches on shaft
d.
Seized bearings
e.
Cracks in turbine wheel. Check with dry penetrant.
f.
Scoring of turbine thrust shoulder.
10. Measure shaft bearing journal diameters. Replace wheel and shaft assembly if journal diameters are worn below
0.5612 inch (14.25 mm).
11. Inspect turbine housing for the following:
a.
Scoring due to contact with rotating parts
b.
Cracks or distortion. Discard housing if cracked or distorted.
c.
Cracking, distortion, or signs of burning at mounting flange.
12. Inspect bearing housing for cracks, pitting, and distortion. Pay particular attention to inlet and outlet parts of oil
passages. Discard bearing housing if damaged.
13. Measure bearing housing bearing bores. Replace bearing housing if bore diameter exceeds 0.8762 inch (22.255
mm).
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