NIGHT VIEWER LATCH REPLACEMENT (Sheet 3 of 5)
CLEANING AND INSPECTION:
Using putty knife and steel wool, remove old sealant and adhesive from hatch and all
WARN I N G
Dry Cle a ning Solve nt P-D-6 8 0 is t ox ic a nd fla m m a ble . T o a void injury,
w e a r prot e c t ive goggle s a nd glove s a nd use in a w e ll-ve nt ila t e d a re a .
Avoid contact w it h skin, eyes, and clothes, and do not breathe vapors. Do
not use near open fire or excessive heat. The flash point for Type I Dry
Cle a ning Solve nt is 1 0 0 °F (3 8 °C). I f you be c om e dizzy w hile using Dry
Cle a ning Solvent, get fresh air immediately and get medical aid. If contact
w it h e ye s is m a de , w a sh your e ye s w it h w a t e r a nd ge t m e dic a l a id
im m e dia t e ly.
Using dry cleaning solvent and rags, remove remaining debris
Inspect all parts for damage or wear. Replace defective parts.
With putty knife. apply adhesive to one side of
new gasket (A) and new pad (B). Apply adhesive
mating surfaces on cupola cover (C) and plate
When adhesive is tacky, aline and apply new
gasket (A) and new pad (B).
and apply sealing compound to screw threads.
Before performing step 4, get
another person to help aline holes in
plate (D) and latch mechanism (G)
with holes in cupola cover.
Using fingers, start screws (F) through cupola
cover (C) into latch mechanism (G).
Using 3/4 inch socket and torque wrench, tighten
two screws (F) to 98-122 lb-ft (133-165 N·m).
Go on to Sheet 4