ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
T0 35C2-3-471-2
NAVY
AG-320B0-MME-000
8-4.
OVERHAUL
(cont)
d.
Repair.
turbine assembly
OF TURBINE ASSEMBLY.
Repair or replace the
components as follows:
(1) Replace bolts if signs of
stretching,
distortion, necking, or
damaged threads are present.
Replace
bolts if heads have hollows.
(2) Replace bolts if cracks are
visible or are revealed by nondestruc-
tive testing.
Repair of bolts is not
permitted.
(3) Replace the turbine nozzle if
cracks are visible or are revealed by
nondestructive testing.
(4) Replace turbine nozzle if
nicks, scratches,
or erosion damage is
present at vane passages.
(5) Replace
visibly warped or
rub damage.
(6) Replace
turbine nozzle if
if there is turbine
turbine nozzle if
dimensions as defined in table 1-1 are
outside acceptable tolerance.
(7) Replace all shims that show
distortion or signs of pinching.
(8) Replace turbine wheel if vanes
are broken, missing, or cracked.
(9) Replace turbine wheel if
cracks are visible or are revealed by
nondestructive testing.
(10) Replace turbine wheel if
shaft is worn or damaged.
(11) Replace wheel if shaft is
cracked or scored, or if threads are
stripped.
(12) Replace turbine wheel if
dimensions as defined in table 1-1 are
outside acceptable tolerance.
(13) Replace wheel if bearing
journal is out of round and undersize.
(14) Replace labyrinth seals if
defects are found.
(15) Replace turbine backshroud if
cracks,
erosion, or
nicks
exceed
acceptable limits.
(16) Replace
backshroud if
dimensions as defined in table 1-1 are
outside acceptable tolerance.
(17) Remove burrs and
surface
defects by grinding.
Blend ground areas
into surrounding surface using crocus
cloth, P-C-458.
(18) Replace diffuser if defects
are visible or are
revealed by non-
destructive testing.
(19) Replace diffuser if vanes are
broken or erosion exists, and if nicks
or scratches are deeper than acceptable
limits.
(20) Replace diffuser if dimen-
sions exceed acceptable tolerance.
(21) Using a fine abrasive stone
and following original contour, remove
surface defects on diffuser by grinding.
Polish ground area using crocus cloth,
P-C-458.
8-28
