ARMY
TM 5-6115-612-34
NAVY
AG-320B-MME-00
8-3. MAINTENANCE OF TURBINE ASSEMBLY.
(cont)
b. Inspection.
(1)
The turbine assembly is disassembled and
inspected in accordance with paragraphs 8-4a and 8-4c.
(2)
Inspect oil supply and oil drain tubes for
cracks, leaking, or bends. Inspect flares on tubing for
integrity. Replace tubing if damaged.
(3)
Pressure test oil supply line to 60 psi.
(4)
Inspect fuel drain line for fraying or damage
Replace if damaged.
(5)
Inspect oil supply fittings and fuel and oil
drain fittings for damage threads, visible cracks, and
flaws in the mating surfaces. Replace fittings if
damaged.
(6)
Inspect bleed air connector for nicks, burrs,
and worn or damaged threads. Replace if damaged.
(7)
Inspect speed sensor for broken threads,
burned insulation, or other damage. Replace if
damaged.
(8)
Inspect speed sensor clip for damage.
Replace if damaged.
(9)
Inspect padeye for cracks. Replace if
cracked.
8-4. OVERHAUL OF TURBINE ASSEMBLY.
a. Disassembly.
NOTE
See Table 2-3, Fabricated Tools and
Equipment for fabricating dimensions
and specifications for all FT-21XXX
numbers referenced in the text.
(1)
Remove combustion chamber case
assembly in accordance with paragraph 8-2a.
(2)
Remove turbine assembly in accordance
with paragraph 8-3a.
CAUTION
To prevent damage, DO NOT use lead
or wax base pencils for marking on high
temperature alloy parts. Carbon/wax in
pencils Is detrimental to parts. Use red
ink felt pens or grease base pencils.
(3)
Matchmark turbine nozzle (1, Figure 8-6) to
diffuser (2).
(4) On front of compressor inlet housing (3) remove
lockwire, nuts (4), and washers(5) that hold bolts (6)in
the 2, 3, 5, 6, 8, 9, 11, 12, 14, 15, and 17 positions. (See
Figure 8-7.) Remove bolts (6, Figure 8-6) from turbine
nozzle (1).
NOTE
Knock bolts out with nylon rod and
hammer or nonmetallic hammer,
if
necessary.
(5)
Pry off turbine nozzle (1) with roll head pry
bars, if necessary and remove shim set (7). Measure
and record thickness of shim set. Remove six nuts (8)
and six bolts (9). Separate turbine nozzle assembly (1)
Change 4 8-19
