TM 9-2320-209-34-2-3 FRAME 3 1. Slide quartz rod (1) into tube (2) of flame detector switch (3). Place bow spring (4) on microswitch frame (5). Flip microswitch (6) down into place. 2. Screw in adjusting screw and washer (7) and push up on bow spring (4) while tightening adjusting screw (7). 3. Tighten screws (8) just tight enough so microswitch (6) is held in place. 4. Slowly unscrew adjusting screw (7) until microswitch (6) clicks. Slowly screw in adjusting screw (7) until microswitch (6) clicks. Screw in adjusting screw (7) exactly three-fourths of a turn more. 5. Tighten screws (8). END OF TASK 21-37