TM 5-5420-227-24
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
1.
parts.
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
2.
and dirt.
Inspect all parts for damage or wear. Replace defective parts.
3.
INSTALLATION:
With putty knife. apply adhesive to one side of
1.
new gasket (A) and new pad (B). Apply adhesive
mating surfaces on cupola cover (C) and plate
(D).
When adhesive is tacky, aline and apply new
2.
gasket (A) and new pad (B).
Place new lockwashers (E) on two screws (F)
3.
and apply sealing compound to screw threads.
NOTE
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
4.
cover (C) into latch mechanism (G).
Using 3/4 inch socket and torque wrench, tighten
5.
two screws (F) to 98-122 lb-ft (133-165 Nm).
Go on to Sheet 4
Change 1
3-32.3