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TM 9-2330-272-14
4-62. MANHOLE COVER MAINTENANCE (M131A4 AND M131A4C) (Con’t).
b.
DISASSEMBLY
Remove vent valve (5), retainer (6), gasket (7), fill cover (8), and washer (9) from manhole cover (12). Discard
gasket.
c. CLEANING AND INSPECTION
WARNING
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flame or excessive heat.
The solvent’s flash point is 100°F-138°F (38°C-59°C). If you become dizzy while
using cleaning solvent, immediately get fresh air and medical help. If solvent contacts
eyes, immediately wash your eyes and get medical aid.
1.
Clean parts with dry cleaning solvent. Allow to dry.
2.
Inspect all parts for corrosion and damage, Replace any corroded or damaged parts.
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