TM 9-2320-209-20-3-3 c. Assembly. 1. Push pin (1) through upper hole in sheave mount assembly (2) and hole in swivel block assembly (3). 2. Push two cotter pins (4) through holes in pin (1). 3.. Push pin (5) through lower hole in sheave mount assembly (2). 4. Push two cotter pins (6) through holes in pin (5). 5. Using pliers, bend open ends of two cotter pins (4) and two cotter pins (6). GO TO FRAME 2 18-485