TM 5-5420-228-24
VISION BLOCK REPLACEMENT (EARLY MODEL CUPOLA) (Sheet 3 of 3)
Using 7/8 inch socket, tighten
4.
jackscrew (C) to seat vision
block (A) in place.
5.
Using 7/8 inch socket, alternately
tighten two outer screws (D) to
10 lb-ft (13 N m).
6.
Using locking wire (E) and
slipjoint pliers, lockwire
three screws holding wedge (B).
7.
Using sealing compound kit,
apply sealant around outer
circumference of vision block
(A) to obtain a waterproof seal
between vision block (A) and
cupola (F).
NOTE
Sealant will be tacky when applied
but will harden to form a hard
rubber like seal.
Align bezel (G) with holes in
8.
cupola.
Using flat-tip screwdriver, insert
9.
and tighten fourteen screws (H).
End of Task
TA251413
3-12