TM 55-2840-254-23
4-46 CLEAN FOURTH STAGE POWER TURBINE NOZZLE (AVIM)
4-46
INITIAL SETUP
Applicable Configurations:
All
Tools:
Compressed Air Source
Fiber Brush
Goggles
Materials:
Dry Cleaning Solvent (E17)
Gloves (E20)
Thermocouple Harness Assemblies Removed
(Task 4-20)
Third Turbine Nozzle and Support Removed
(Task 4-26)
No. 4 and 5 Bearing Package Removed
(Task 4-37, Steps 1 thru 15)
No. 4 and 5 Bearing Oil Tubes Removed
(Task 4-41)
Fourth Stage Power Turbine Nozzle Removed
(Task 4-45)
General Safety Instructions:
Personnel Required:
68B10 Aircraft Powerplant Repairer
Equipment Condition:
Off Engine Task
Engine Oil System Drained (Task 1-75)
Combustion Section and Power Turbine
Removed (Task 3-5)
Combustion Section and Power Turbine
Disassembled (Task 3-6)
Dry cleaning solvent (E17) is flammable
and toxic. It can irritate skin and cause
burns. Use only in well-ventilated area,
away from heat and open flame. In case
of contact, immediately flush skin or
eyes with water for at least 15 minutes.
Get medical attention for eyes.
1. Clean fourth stage power turbine nozzle (1).
a. Wear gloves (E20). Clean nozzle with dry
cleaning solvent (E17).
b. Remove contaminants by scrubbing with a
fiber brush.
When using compressed air for cleaning,
use approved protective equipment for
eyes and face. Do not use more than
30 psig air pressure. Do not direct air
toward yourself or another person. Fail-
ure to comply could result in injury to
eyes or skin. In case of injury, get medi-
cal attention.
c. Wear goggles. Blow dry nozzle (1), using clean,
dry compressed air.
GO TO NEXT PAGE
4-271
