TM 9-2350-277-20-4REPLACE COMMANDER’S CUPOLA VISION BLOCK LOCKS AND SEALS (M113A3 ANDM1059A3, M58 ONLY) — Continued0490 00INSTALLATIONNOTESurface on seal marked BOND THIS SIDE should be glued to cupola.1. Apply adhesive to cleaned mating surface around vision block opening. Allow adhesive to become tacky. Install newseal (5) on cupola.2. Install arm (2) and washer (4) in cupola bracket. Secure with new spring pin (3).3. Install thumbscrew (1) in arm (2). Deform first thread of thumbscrew to prevent easy removal.FOLLOW-THROUGH STEPS1. Install vision block (see your -10).END OF TASK0490 00-3/4 blank
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