ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
NAVY
AG-320BO-MME-OOO
8-4.
OVERHAUL OF TURBINE ASSEMBLY.
(cont)
b.
Cleaning.
CAUTION
To prevent subsequent problems with
components, use caution in cleaning
so as not to remove evidence of
damage.
Inspect both before and
after cleaning.
(1) Steam clean oil supply and oil
drain tubes.
(2) Soak in soap solution and
steam clean oil supply, oil drain, and
fuel drain fittings.
(3) Soak in soap solution and
steam clean bleed air connector.
(4) Soak in soap solution and
steam clean bolts (6, figure 8-6).
(5) Soak turbine nozzle in soap
and carbon removal compound (MIL-C-
25107).
CAUTION
To prevent damage to the turbine
wheel, no abrasive blasting is
allowed.
(6) Hand clean turbine wheel with
bristle brush in alcohol.
(7) Chemically
clean
turbine
backshroud with P-D-680 Type I solvent.
(8) Vapor degrease, chemically
clean with P-D-680 Type I solvent, and
steam clean diffuser.
(9) Chemically clean with P-D-680
Type I solvent and steam clean com-
pressor wheel.
(10) Vapor degrease and steam
clean bearing housing.
(11) Chemically clean with P-D-680
Type I
solvent
and vapor degrease
compressor inlet housing.
c.
Inspection.
(1) Inspect bolts (6, figure 8-6)
for cracking, stretching, distortion,
necking, and damaged threads.
Inspect
bolt heads for hollows. Refer to table
8-3 and perform nondestructive test on
bolts.
(2) Inspect turbine nozzle for
nicks, scratches, and erosion damage at
vane passages.
(3) Visually check turbine nozzle
for cracks, signs of turbine wheel rub,
warps, or other visible damage.
(4) Refer to table 8-3. Perform
nondestructive test on turbine nozzle.
(5) Check dimensions of turbine
nozzle in accordance with table 1-1.
(6) Check all shims for distortion
or pinching.
(7) Inspect turbine wheel for
cracks and broken, missing, or cracked
blades.
(8) Inspect turbine wheel shaft
for worn or stripped threads, cracks,
and scoring.
(9) Check internal splines of
turbine wheel for wear and damage. Refer
to table 1-1 for acceptable wear limits.
8-26
