NIGHT VIEWER ACCESS DOOR AND SEAL REPLACEMENT (Sheet 2 of 5)
Remove access door (A) from cupola (H)
and remove shim (J) and spring (K).
Remove and discard seal (L) from grooves
in access door (A). Use flat-tip screw
driver, if necessary.
Using 3/4 inch punch and hammer, drive
out bushings (M) and (N) from inside
Remove and discard preformed packing
(P) from groove in cupola.
CLEANING AND INSPECTION:
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 ne a r ope n fire or e x c e ssive he a t . T he fla sh point for T ype 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.
Clean all parts and bushing hole in cupola
of any foreign matter with dry cleaning
Clean seal and packing grooves of door assembly
(A) and cupola (H) with dry cleaning solvent.
Use screwdriver to remove old adhesive, if
Visually inspect all parts for cracks, damage,
and corrosion. Replace any defective parts.
Corroded metallic parts which cannot be
cleaned with crocus cloth or steel wool shall
Go on to Sheet 3