When maintaining radioactively illuminated fire control equipment, follow radiation
hazard procedures in warning summary (M137 only).
Use sealing compound in well-ventilated area away from open flame. Sealing
compound is harmful to skin and clothing and may give off harmful vapor. Exercise
care whenever sealing compound is used.
Apply a light coat of sealing compound (item 13, WP 0152 00) to threads of safety relief valve (1) and install
in optical element cell (2).
1 fc 5 8 3
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