(4)
Pressure air-dry compressor blades.
(5)
Prepare graphite varnish anti-fretting coating.
NOTE: Mix one part corrosion preventive synthetic resin varnish (AMS3132) (SECTION VII) by weight to two parts alcohol dispersion of colloidal graphite solution containing 18 to 22 percent of graphite (SECTION VII) by weight, thinned with ester thinner alcohol (AMS3170) (SECTION VII).
(6)
Apply anti-fretting coating by spraying one or more coats to obtain film thickness of approximately 0.0002 inch (0,00508 mm).
NOTE: Air dry blades a minimum of 10 minutes between coats.
(7)
Heat blades for one to two hours at 290 to 300F (143 to 149C).
S. Method No. 203T: Cleaning Igniter Plug
WARNING: USE THE CORRECT PERSONAL PROTECTION. ABRASIVE BLASTING WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.
(1) Use a standard sandblast cabinet and 120 grit sand (MIL-A-22262) to remove hard carbon or lead deposits and corrosion and scale by subjecting parts to abrasive blasting. Proceed as follows.
WARNING: SOVENT IS TOXIC AND FLAMMABLE. DO NOT BREATHE THE FUMES. DO NOT PERMIT CHEMICAL TO TOUCH EYES OR SKIN. DO NOT USE NEAR OPEN FLAMES OR HIGH TEMPERATURES.
(a) Clean parts with solvent (MIL-PRF-680) spray in an outside ventilated spray booth to remove oil and grease contamination.
Cleaning
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WARNING: USE THE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. THE AIRFLOW CAN CAUSE CUTS. DO NOT POINT IT AT YOUR SKIN. SOVENT IS TOXIC AND FLAMMABLE. DO NOT BREATHE THE FUMES. DO NOT PERMIT CHEMICAL TO TOUCH EYES OR SKIN. DO NOT USE NEAR OPEN FLAMES OR HIGH TEMPERATURES.
(b)
Air-dry igniter plug with dry, filtered, compressed air.
(c)
Mask any surfaces that are subject to damage by blast cleaning
WARNING: USE THE CORRECT PERSONAL PROTECTION. ABRASIVE BLASTING WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.
CAUTION: KEEP NOZZLE IN MOTION TO PREVENT BLAST FROM DWELLING ON ONE SPOT, AS DAMAGE TO PART WILL RESULT.
(d)
Set blasting equipment air pressure at 15 to 30 psig (103 to 207 kPa), then subject parts to sandblast.
(e)
Reduce air pressure as required to control action on the base metal.
T. Method No. 203U: Removing Aluminum Particles From Titanium Parts Remove aluminum particles from titanium parts as follows: WARNING: USE THE CORRECT PERSONAL PROTECTION. THIS CHEMICAL SOLUTION CAN CAUSE SKIN, EYE AND LUNG DAMAGE. THE DANGER AND PRECAUTIONS FOR EACH CHEMICAL IS DIFFERENT.
(1)
Remove aluminum particles from the part by soaking in sodium hydroxide solution (Method No. 202H). Soak until all aluminum particles are removed. If necessary, use a nylon brush to remove particles.
(2)
Rinse parts in water at 80 to 110F (27 to 43C).
WARNING: USE THE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. THE AIRFLOW CAN CAUSE CUTS. DO NOT POINT IT AT YOUR SKIN.
(3)
Pressure air-dry (20 psig (137,895 kPa) maximum) to remove excess water from part.
(4)
Dry in oven at 160 to 250F (71 to 121C) for one hour.
(5)
Store parts in dry place.
Cleaning
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U. Method No. 203V: Aqueous Cleaning
(1) Remove Grease From Parts With Aqueous Cleaning
WARNING: USE THE CORRECT PERSONAL PROTECTION. THIS CHEMICAL OR SOLUTION CAN CAUSE SKIN, EYE, AND LUNG DAMAGE. THE DANGER AND PRECAUTIONS FOR EACH CHEMICAL IS DIFFERENT.
(a)
Put the part in a rack and into the solution (Brulin 815GD, Duraclean 282, Turco 5948 or Ecomate FN) (SECTION VII) so that all surfaces are touched by the solution.
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