TM 9-2350-277-20-4
REPLACE COMMANDERS CUPOLA VISION BLOCK LOCKS AND SEALS (M113A3 AND
M1059A3, M58 ONLY) Continued
0490 00
1.
Remove thumbscrew (1) from arm (2).
2.
Remove spring pin (3) from arm (2). Discard pin.
3.
Remove arm (2) and washer (4) from cupola bracket.
4.
Scrape seal (5) from vision block opening.
0490 00-2