WARNING: USE CORRECT PERSONAL PROTECTION.  ALKALINE CLEANING SOLUTIONS ARE HAZARDOUS. AVOID INHALING FUMES OR MIST.  AVOID CONTACT WITH SKIN. AFTER USE, WASH HANDS AND FACE THOROUGHLY.

(2)  
Immerse parts in alkaline cleaner solution (Method No. 202A) at temperature of 160 to 180F (71 to 82C) for three to five minutes minimum.

(3)  
Scrub part surface with a stiff plastic fiber bristled brush to remove surface contamination.

NOTE:  If old gaskets or sealing compounds are present, carefully lift softened gaskets with a knife blade and scrape surface clean.

(4)  
Rinse parts in water at 80 to 110F (27 to 43C).

WARNING: USE CORRECT PERSONAL PROTECTION.  COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.

(5)  
Pressure air-dry (20 psig (137,895 kPa) maximum) to remove excess water from part.

(6)  
Dry in oven at 160 to 250F (71 to 121C) for one hour.

(7)  
Store parts in dry place.

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K. Method No. 203L: Cleaning Electrical Components Clean electrical component parts as follows: WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE.  DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
(1)  
Wipe with clean, lint-free cloth dipped in methyl-ethyl-ketone (MEK) (ASTM D470) (SECTION VII) or solvent (Federal Specification P-D-680, Type I) (SECTION VII).

(2)  
Clean electrical connectors using degreaser and cleaner (MS-941/CO2) (SECTION VII) and remove oily type soil with cotton swab dipped in aqueous cleaner/degreaser solution (SECTION VII).

L. Method No. 203M: Cleaning Fittings and Plumbing Clean fittings and plumbing as follows: WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE.  DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
(1)  
Spray tubes and fittings externally and internally with solvent (Federal Specification P-D-680, Type I) (SECTION VII) in an outside-ventilated spray booth.

WARNING: USE CORRECT PERSONAL PROTECTION.  COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.

(2)  
Pressure air-dry (20 psig (137,895 kPa) maximum) to dry parts.

(3)  
Insert protective plugs and caps in each end of plumbing and fittings.

M. Method No. 203N: Cleaning Electronic Components Clean electronic components as follows: NOTE: Do not use ultrasonic or vapor degreasing on electronic components.  Avoid excessive use of solvent. In all cleaning, a final drying of components with compressed air is recommended. Do not clean for the sake of appearance only. Clean only as required to facilitate function and/or inspection.
(1)  
Clean "mechanical" surfaces such as chassis, housings, etc, with abrasive paper (Federal Specification P-P-101) (SECTION VII), or abrasive cloth (Federal Specification P-C-451) (SECTION VII), followed by a final cleaning with a lint-free cloth dipped in isopropyl alcohol (Federal Specification TT-I-735) (SECTION VII) and compressed air.

(2)  
Clean printed circuit boards using an eraser (Pink Pearl No. 101) (SECTION VII) with extremely light pressure. Use eraser dry, then finish off with a lint-free cloth dampened with isopropyl alcohol (Federal Specification TT-I-735) (SECTION VII).

(3)  
Clean connector pins/sockets with a fiber bristled brush dipped in isopropyl alcohol (Federal Specification TT-I-735) (SECTION VII).

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(4) Clean temperature sensors and exposed wire elements as follows:
(a) Sealed-probe type
Use 120 or finer grit abrasive paper (Federal Specification P-P-101) (SECTION VII) or abrasive cloth (Federal Specification P-C-451) (SECTION VII).
　
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