TM 10-4930-220-13&P
l To avoid contamination, check your local installation procedures to properly dispose
of waste and to ensure compliance with Environmental Protection Agency guidelines.
l Clean parts in a well ventilated area. Avoid inhalation of solvent fumes and prolonged
exposure of skin to cleaning solvent. Wash exposed skin thoroughly. Dry cleaning sol-
vent used to clean parts is potentially dangerous to personnel and property. Do not
use near open flame or excessive heat. Flash point of solvent is 100°F. (38°C. to 50°C.).
Wear eye protection when blowing solvent from parts.
l Compressed air used for cleaning purposes should not exceed 30 PSI (2.1 kg/cm).
a.
Cleaning Exterior.
(1) Wash all exterior metal surfaces with a solution of trisodium-phosphate, FS-O-T-642D, and wa-
ter.
(2) Rinse thoroughly and dry.
(3) Parts removed on disassembly maybe cleaned by immersing or wiping with cleaning solvent,
(Appendix E, Section II, item 1 ).
b. Cleaning Interior.
The following safety precautions must be observed before welding tanks used
for flammable liquids.
Tank must have a static ground during all operations.
Use caution with all tools and metal objects to insure that no sparks will be created.
Combustible vapor tests must be performed before and immediately following purging
the tank Do not begin repair of the tank until declared safe by safety personnel.
Allow only thoroughly trained personnel to conduct vapor tests.
Discontinue all operations if an electrical storm is threatening or in progress.
Eliminate all conditions which could cause explosions.
Do not wear wool, nylon, silk, rayon or other static electricity generating clothing.
Wear clean cotton clothing with no metal buttons or fittings. Remove all contents from
pockets.
Rubber boots must be worn.
Use cotton rags for cleaning. Do not use cleaning material that will generate static
electricity.
Entry into the tank is prohibited unless the tank has been thorougly purged, and
the atmosphere has been tested for air contaminants and oxygen deficiency by
technicality qualified personnel.
Conduct combustible vapor test using an acceptable explosive meter.
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