TM 5-5420-227-24
CUPOLA TOP AND VISION BLOCK REPLACEMENT (Sheet 2 of 3)
NOTE
Removal and installation are the same for all
seven blocks except two rear blocks. Rear
blocks have only three retainers.
6.
Using side cutters, remove lockwire (E).
7.
Using 1/2 inch wrench, remove screws
(F) and retainers (G).
8.
Using chisel and hammer, remove vision
block (H).
Using putty knife, remove sealant from vision block (H) and cupola body (J).
9.
INSTALLATION:
Using brush, coat sides, top, and bottom
1.
of vision block (A) with sealing compound.
Place vision block (A) in position.
2.
Place retainers (B) in position.
3.
Manually install screws (C) to secure
4.
vision block (B).
5.
Using 1/2 inch wrench, tighten screws
(c).
6.
Using pliers, install lockwire (D).
TA170241
Go on to Sheet 3
3-11
