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. 3. Tighten screws (8) just enough so microswitch (6) is held in place. 4. Slowly unscrew adjusting screw (7) until microswitch (6) clicks. Slowly screw in adjusting screw until microswitch clicks. Screw in adjusting screw exactly three-quarters turn more. 5. Tighten screws (8). END OF TASK 21-78